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PIPING COMPONENTS CODE

Posted by Antony Thomas at Friday, December 17, 2010

DOWNLOAD THE PIPING COMPONENTS CODE DEMARCATION.

ASME/ANSI CODES FOR

PIPES

FLANGES

FITTINGS

VALVES

PSVs

Piping Codes

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PIPING DESIGNER REQUIRED FOR OMAN

Posted by Antony Thomas at Thursday, December 16, 2010

Dear All,

We are looking for a the following professionals for our client in Oman, details of the same can be found out below

Position 1

:

Sr. Piping Designer

Work Location

:

Interior of Oman, in any of the PDO sites.

Work Schedule

:

3 Months working, 28 Days Off Unpaid

Accommodation

Duration

:

:

Food & Accommodation provided by the Client

5 Years

Qualification Requirement

  • Diploma or ITI
  • Minimum of 12 years of Experience in Designing with special focus on Oil & Gas Industry
  • Must have proficiency in using AutoCad

Position 2

:

Piping Designer

Work Location

:

Interior of Oman, in any of the PDO sites.

Work Schedule

:

3 Months working, 28 Days Off Unpaid

Accommodation

Duration

:

:

Food & Accommodation provided by the Client

5 Years

Qualification Requirement

  • Diploma or ITI
  • Minimum of 8 years of Experience in Designing with special focus on Oil & Gas Industry.
  • Must have proficiency in using AutoCad

Position 3

:

Sr. Electrical Designer

Work Location

:

Interior of Oman, in any of the PDO sites.

Work Schedule

:

3 Months working, 28 Days Off Unpaid

Accommodation

Duration

:

:

Food & Accommodation provided by the Client

5 Years

Qualification Requirement

  • Diploma or ITI
  • Minimum of 12 years of Experience in Designing with special focus on Oil & Gas Industry
  • Must have proficiency in using AutoCad

Position 4

:

Electrical Designer

Work Location

:

Interior of Oman, in any of the PDO sites.

Work Schedule

:

3 Months working, 28 Days Off Unpaid

Accommodation

Duration

:

:

Food & Accommodation provided by the Client

5 Years

Qualification Requirement

  • Diploma or ITI
  • Minimum of 8 years of Experience in Designing with special focus on Oil & Gas Industry
  • Must have proficiency in using AutoCad

Position 5

:

Sr. Civil Designer

Work Location

:

Interior of Oman, in any of the PDO sites.

Work Schedule

:

3 Months working, 28 Days Off Unpaid

Accommodation

Duration

:

:

Food & Accommodation provided by the Client

5 Years

Qualification Requirement

  • Diploma or ITI
  • Minimum of 12 years of Experience in Designing with special focus on Oil & Gas Industry
  • Must have proficiency in using AutoCad

Position 6

:

Civil Designer

Work Location

:

Interior of Oman, in any of the PDO sites.

Work Schedule

:

3 Months working, 28 Days Off Unpaid

Accommodation

Duration

:

:

Food & Accommodation provided by the Client

5 Years

Qualification Requirement

  • Diploma or ITI
  • Minimum of 8 years of Experience in Designing with special focus on Oil & Gas Industry
  • Must have proficiency in using AutoCad

Interested Candidates can send their CVs along with the following Details

  • Current Salary
  • Expected Salary
  • Mobilization Period

Attn: Mr. Haider Ali Ansari

Mobile: +91-9870236781

Email: ali@uroojcareer.com

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QATAR TECHNIP- SR. PIPING DESIGNER

Posted by Antony Thomas at Thursday, December 02, 2010

Greetings from Projex Engineering Management Services...............
We would like to inform you, regarding our current requirement of Senior Piping Designer on Contract Basis at Technip – Qatar. Kindly fill the following the details.
1. Current company:
2. Current location:
3. Total exp in oil n gas:
4. Current salary:
5. Expected salary:
6. Notice period:
Since the Requirement is on urgent basis, we request you to send your updated CV at the earliest.
PAYROLL - M/S PROJEX ENGINEERS PVT LTD
Terms - Position purely on 3 – 6 months contract (Secondment)
Extension – As per Clients approval
Client - Technip Qatar TPME an EPC Engineering & Construction company, for their on going project in Oil & Gas, Offshore, Onshore, Refinery, Petrochemical, Chemical on Permanent Basis OR Contract Basis.
Project - RAS GAS - Onshore / Offshore
Position – Senior Piping Designer
Discipline – Design Experience – 10 + Years
Location - Middle East ( Doha - Qatar )
Date of Joining - Immediate
Qualifications: Diploma in Mechanical Engineering
Introduction to Our Organization - Project Management /Manpower Supply
Projex Engineers Private Limited provides pre-project services like vendor selection and approval, design coordination and engineering support, procurement assistance, project management, inspection and expediting, construction supervision, and commissioning support.. It has extensive experience in the fields of Petrochemical, Refinery and Oil and Gas Projects.
Pragati Engineering Management Services :- We are Skilled Engineering Manpower Consultant engaged in providing manpower consulting services to leading Organization On Lump-sum turnkey projects related to Oil & Gas, offshore, onshore, LNG plant, Down & Up Stream, Refineries, Petrochemicals, Chemicals, Sectors in Design, Construction, Process, Operation & Maintenance, Commissioning & Erection, Shut-Down & Plant Start-Up.
Thanks & Regards,
Kishor J Ranaware
Head-Operation
Projex Engineers Pvt Ltd.
Pragati Engineering Management Services
306, Hamilton A Wing,
Hiranandani Business Park , Hiranandani Estate,
Ghodbunder Road , Thane 400607 /Mumbai - India
Off. no: +91-22- 40128209 /40128509

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PDMS DESIGNERS REQUIRED FOR SMOE SINGAPORE

Posted by Antony Thomas at Tuesday, November 09, 2010

PDMS DESIGNERS(ELECTRICAL, INSTRUMENTATION, MECHANICAL, PIPING, STRUCTURAL OR ARCHITECTURAL) 

SMOE Pte Ltd

SMOE Pte Ltd, a wholly owned subsidiary of Sembcorp Marine, is a recognised leader in the engineering and construction of offshore production platforms and floating production facilities for the global oil and gas industry.

We are capable of delivering a full range of turnkey solutions in engineering, procurement and construction through to transportation, installation and commissioning. Our offshore engineering expertise also includes the construction of fixed platforms and offshore installations, and the fabrication, integration and pre-commissioning of topside production modules for FPSOs and floating systems.

Equipped with one of the finest fabrication facilities in the region, SMOE operates a 20.7-hectare fabrication yard situated adjacent to Sembawang Shipyard on the north-eastern shore of Singapore, with clear access to the open sea. We also operate a 30-hectare fabrication yard in the Kabil Industrial Zone on Batam Island, Indonesia.

Visit our website at
www.smoe.com.

PDMS DESIGNERS(ELECTRICAL, INSTRUMENTATION, MECHANICAL, PIPING, STRUCTURAL OR ARCHITECTURAL)

RESPONSIBILITIES:
The successful candidate is responsible for developing detailed drawings and related specifications for large modules/topsides offshore oil & gas facilities.  He/she will use design tools software such as PDMS and AutoCAD to accomplish assigned tasks with design quality within allotted schedule and budgeted hours.
REQUIREMENTS:
·                     Diploma in related field (electrical, instrumentation, mechanical, piping, structural or achitectural) preferred;
·                     Minimum 5 years experience in the preparation of design and drafting activities for FPSO, EPC and LQ projects;
·                     Demonstrated ability with PDMS Design and Draft, AutoCAD and/or Micro station;
·                     Knowledge of 3D to 2D drafting will be highly advantageous;
·                     Practical knowledge of Smart Plant Instrumentation & Smart Plant Electrical;
·                     Excellent interpersonal skills with a willingness to take ownership over tasks.
Career Level
Middle
Yr(s) of Exp
5 years
Qualification
Diploma
Industry
Engineering - Others
Job Function

60 Admiralty Road West, 759947, Sembawang Enlarge Map
Salary
Not Specified / Negotiable
Employment Type 

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PDMS PIPING DESIGNER - OMAN

Posted by Antony Thomas at Thursday, November 04, 2010

Please be advised that we currently have the following opportunity available that may be of interest:

PDMS Piping Designer - Oman

Location: To be based in Contractors Head Office in Muscat
Duration: Long Term (12 month renewable contract)

Salary: Negotiable

Single or family status available

12 month renewable contract

4 weeks holiday per annum

Flights, Accommodation, Transport at Client expense

Minimum 10 years experience in FEED within the Oil and Gas industries

Unfortunately we have been given no further information at present, however, should the above position be of interest and you feel you have the relevant experience please do not hesitate to contact me to advise your availability and we will submit your Cv to our client for review.

Best regards,

Joe Doherty
Manager - RSL

Tel +44 1903 820303
Fax +44 1903 821414

E-mail joe@rsljobs.com

www.rsljobs.com

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Designer / Senior Designer / Lead Designer Job in Singapore

Posted by Antony Thomas at Tuesday, November 02, 2010

Designer / Senior Designer / Lead Designer

Aibel AS is one of the largest Norwegian oil service companies that engineers, builds, maintains and modifies oil and gas production facilities. With our long experience, skills and expertise, we help our customers to achieve increased oil and gas production.



The Singapore office, Aibel Pte Ltd, is the engineering hub for the region. As part of our expansion plans, we are currently looking for dynamic, committed individuals to join us. Opportunities exist for suitable candidates to be trained in Norway.



Disciplines:
· Piping
· Electrical
· Instrumentation
· Mechanical
· Process
· Project / Planning
· Structural
· Technical Safety




Requirements:

1. Diploma in Engineering with PDMS

2. 1 to 15 years experience in the OGP industry and discipline engineering experience from large projects or base organization.

3. Possess good knowledge of international regulations, codes and standards and be well versed in the standard engineering tools used in the OGP industry is essential.

4. Well versed in standard 2D and 3D drafting tools such as PDMS/PDS is required for designer position.

5. Fresh graduates are welcomed to apply for Designer positions.



With our 4000 employees, we work at new and existing fields and production facilities, offshore and land-based, on fixed and floating installations. We are located close to our customers and operate from the most important oil and gas centres in Norway. Aibel is committed to creating value for its customers and be a progressive and interesting workplace for all our employees.



http://www.aibel.com/

Previous Job Post: PIPING DESIGNER JOB IN NORWAY

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Piping Welding Symbols: Download PDF

Posted by Antony Thomas at

Download the Piping Welding Symbols PDF directly from here. These sysmbols are usefull when you need to make steel member pipe support

Piping Welding Symbols

PIPING GENERAL ARRANGEMENT SYMBOLS

Posted by Antony Thomas at Monday, November 01, 2010

PIPING DRAWING GA SYMBOLS ARE VERY USEFUL AND IT IS ATTACHED HERE FOR THE PIPERS.

Piping GA symbols for Gate Valve, Globe valve, Butterfly Valve, Globe Valve, Control valve, Pressure relief valve, Needle valve, Angle valve, Needle valve and the Piping components like elbow, Tee, Lateral Tee and much more symbols.

Piping GA Symbols

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Piping Drawings Checking Procedure

Posted by Antony Thomas at Tuesday, October 26, 2010

CHECKING PIPING DRAWINGS PROCEDURE


http://piping-info.blogspot.com
For Piping Tips and Info Visit http://piping-info.blogspot.com

DISCLAIMER

This Procedure is intent to prepare for the Piping Checkers perfection. Piping Info accepts no
liability or responsibility whatsoever for it in respect of any use of or reliance upon this procedure
by anyone or any entity.

1.0 PURPOSE

The purpose of this design procedure is to ensure accuracy and completeness of piping drawings
issued by the Mechanical Design Department; and identify responsibility, criteria, and specific items
to be checked by the Mechanical Design Checker.

2.0 MECHANICAL DESIGN CHECKER RESPONSIBILITY

2.1 Responsible that the piping drawings are complete, accurate, interference free,
constructible, maintainable, in compliance with System Design and Checking Guides,
standards, standard deliverable drawings, project design criteria, vendor data, Process
and Instrument Diagram (P&ID), project contract, and engineering requirements.
2.2 Responsible to verify the location and limits of drawing HOLDs to areas that are
incomplete or can not be verified and approved by the checker prior to issue due to
insufficient engineering, vendor, client or other discipline information.
2.3 Responsible to verify that all reference data and documents used to perform the check
are the most current available. This includes vendor drawings, P&ID’s, design criteria,
thermal analysis, other discipline drawings and models. Use the Designed Piping
System Folder that contains design information gathered by the Designer and Lead
Designer for each system.
2.4 Use a hard copy “check print” of the drawings for marking comments in red for
correction that include additions, changes, or deletions. Graphics, dimensions, and
notes that are verified to be correct shall be highlighted in yellow. Comments, notes,
references, etc that are not for correction shall be made in black graphite pencil.
2.5 Upon completion of the initial drawing check, the Checker shall return the check prints
to the originator or Lead Mechanical Designer for correction along with the Designed
Piping System Folder. After correction, the Checker is responsible to “back check” the
drawing to assure all corrections and engineering comments were incorporated
accurately.
2.6 Responsible to check the complete content of the drawing and piping system design
including but not limited to all items contained in this procedure. The checker shall
contact the Mechanical Lead Designer or Engineer for additional project specific
requirements.
2.7 Responsible to maintain check prints, records, and information until the piping system is
fabricated, installed, and operating.
CHECKING PIPING DRAWINGS PROCEDURE
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3.0 DRAWING INFORMATION CHECK

3.1 Drawing Number. Check that the drawing number is in accordance with the project
numbering system, client numbering system.
3.2 Drawing Revision Number/Letter and Description. Check that the drawing revision
number/letter is correct in the title block and revision description block according to
project revision numbering system. Check that the revision description in the revision
block describes the purpose for the drawing issue or changes.
3.3 Drawing Title Block Information. Check that the text in the drawing title block is correct
in accordance with the project standards Deliverable Drawings.
- Project Description
- Drawing Type Description (Piping Isometric, Underground Piping Isometric, Small
Bore Piping Isometric, Analyzed Small Bore Piping, etc)
- Piping System Description
- Scale
3.4 Drawing Signatures. Check that drawing signatures are correct in the title block.
3.5 Back Circles. For revised drawings only, check that back circles are place around
revised areas to identify changes since the previous drawing issue. Check that back
circles from previous revisions have been removed.
3.6 Drawing Notes. Check that general and specific notes are in accordance with the
example on WorleyParsons’ Standard Deliverable Drawings and are applicable to the
drawing content and project specific requirements.
- Check drawing number references listed within the general notes.
- Check Technical Specification number listed within the general notes.
- Check Insulation Specification number listed within the general notes.
3.7 Drawing Attributes. Check that the line graphic and text attributes meet the
requirements of the Project Cadd Specification.
3.8 Spelling and Abbreviations. Check the spelling of all text and abbreviations within the
drawing. Periods after abbreviations are not required.
3.9 North Arrow. Check that a north arrow is on the drawing, including at detail plan views.
3.10 Project Specific Requirements. Check with the Lead Designer and Project Design
Criteria for any project specific drawing or pipe system requirements.
4.0 PIPING SYSTEM INFORMATION CHECK
4.1 System to P&ID Check. Check that the pipe system matches the approved system P&ID
including comments found on the project’s Master Set of P&ID’s. The checker is
responsible that the piping drawing and the P&ID are in agreement for the following:
CHECKING PIPING DRAWINGS PROCEDURE
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- Pipe Line Number
- Pipe Sizes
- Pipe Line Specifications and locations of Line Spec changes within the pipeline.
- Pipe Insulation Class
- Branch and Component sequence
- Equipment Tag Numbers and Descriptions
- Component Tag Numbers
- Flow direction
- Heat Tracing limits, type, and thickness
4.2 Equipment Location, Description, Tag Number. Check the coordinate (n/s, e/w, and
elevation) locations of all equipment to which the pipe system is connected in the model.
The location shall match the general arrangement, equipment setting plan, and
civil/structural drawings. Check that the equipment description and tag number match the
P&ID and Mechanical Equipment List.
4.3 Equipment Nozzle Location, Tag Number and Data. Check the equipment model nozzle
location, size, connection end preparation, flange rating, pipe schedule are in accordance
with the latest equipment vendor drawing.
- Check that nozzle information on piping drawing is correct
- Butt Weld nozzles shall include the nozzle pipe schedule or wall thickness
4.4 Piping Connection to Equipment Nozzle. Check the pipe connecting to the equipment
nozzle matches the nozzle attributes and is compatible.
- Flat Faced or Raised Faced Flanges
- Butt Weld Nozzles requires matching material and pipe wall thickness. Identify
dissimilar metal welds and wall thickness between nozzles and pipe.
- Non-USA vendor may provide nozzles that do not comply with ASME B16.25 weld
bevel standards. Identify locations of any pipe joint that requires a bevel different than
the ASME standard.
4.5 Flow Direction Arrow. Check that each pipe line contains one flow direction arrow. Each
sheet of a piping isometric shall contain a minimum of one flow direction arrow.
4.6 Completeness. Check that all dimensions, notes, information, and details that are
required for the construction and installation of the piping are included.
- Compliance with System Design Guides. Check that the piping system is designed in
accordance with the Mechanical Design Department specific system design guides.
4.7 Project System Design Criteria Documents. Check that the piping system is designed in
compliance with project/client design criteria documents.
4.8 Valve and In-Line Components. Check all valves and in-line pipe components (flow
elements, expansions joints, orifice plates, restricting orifices, etc) end to end dimensions
and connection attributes from approved vendor drawings. Check that the connection
size, type and schedule match the attributes of the pipe. Check all valve actuators for
correct size, orientation and that they are accessible for operation and maintenance.
CHECKING PIPING DRAWINGS PROCEDURE
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- Standard end to end dimensions per ASME/ANSI B16.10 for valves 600 lb class and
below may be approved without approved vendor drawings for gates, globe, and
check valves. All other valves shall be on hold until approved vendor drawings are
available.
- Butterfly, control, ball, plug, and relief valve end to end dimensions do not conform to
end to end standards and shall be on hold until approved vendor drawings are
available.
- Identify dissimilar metal welds and wall thickness between component and pipe.
-
- Check that chain wheel operators are provided on non accessible valves.
4.9 Valve, Flow Element, and In-Line Component Installation Requirements.
Check vendor drawings and installation instructions for installation requirements of
valves, flow elements and in-line components within the pipeline.
- Straight pipe upstream and downstream requirements
- Valve stem orientation (especially butterfly valves)
- Clearances for valve maintenance and disassembly.
- Lugged butterfly valves shall be noted on drawings for proper bolting procurement.
- No gaskets required at low pressure butterfly valves and expansions joints.
- Flat face flanges required at flanged expansion joints
- Flat face flanges are required at cast iron equipment flanges
- Flow element upstream and downstream straight pipe requirements according to the
Control System Engineer requirements.
4.10 Vents and Drains. Check quantity and location of vents and drains. Check that all vent
and drain connections reference the correct standard detail number.
4.12 Minimum pipe spool lengths. Check that there are adequate pipe spool lengths
between pipe line components. Use the following as a guide. Large Bore Butt Weld:
Minimum spool length equivalent to the length of a butt weld reducer. Small Bore
Socket Weld: Minimum exposed pipe length between socket weld components ends
shall be 2”.
4.13 Separation Distances for Branches. Check that there is adequate separation distance
between pipe branches and adequate separation distances between branches and
pipe line ends or components.
4.14 Instrument Connection Orientation and Access. Check that instrument connections
that require access are accessible and that the orientation on the pipe is correct.
Check for proper connection type and size. Check that all Instrument connections
reference the correct standard detail number, and there are sufficient clearances for
element removal from pipe.
- Temperature connections shall be located downstream of pressure connections.
- Temperature thermowells cannot be installed in pipes smaller than 3”.
4.15 Insulation and Insulation Support Lugs. Check insulation requirements to Project
insulation class codes and thickness. Add insulation support lugs on vertical runs of
alloy pipe.
CHECKING PIPING DRAWINGS PROCEDURE
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4.16 Heat Tracing. Check that piping is Heat Traced as identified on the system P&ID and
in accordance with the Project Heat Tracing Criteria.
4.17 Pipe Penetrations symbols. Check that all concrete floor, platform grating, wall, and
grade penetrations are indicated and labeled on piping isometrics. Callout core drilled
openings in existing walls when required.
4.18 Waterstops. Check that water stops are provided on underground piping at floor and
wall penetrations.
4.19 Slope. Check that pipe systems that require slope have the proper minimum slope
and the correct slope direction. For hot piping verify pipe does not reverse slope in hot
position.
4.20 Pipe Supports and Welded Attachments. Check that pipe supports are shown when
required and locations, quantity, and tag numbers have been review and approved by
the Piping Engineering department. Check that shop welded pipe support attachment
details are provided on alloy piping for shop welding before shop stress relieving.
4.21 Material List on Isometrics. Check that all pipe and pipe component material
descriptions in the isometric drawing material list matches the engineering pipe line
specification.
4.22 Insulating Flange Kits. Check that insulating flange kits are identified on aboveground
piping systems connecting to underground pipe systems where required by the
pipeline specification.
4.23 Dissimilar Metal Welds. Check that dissimilar metal welds that may occur at valves,
equipment nozzles, and material spec changes are identified and transition pieces are
provided if required.
4.24 Dissimilar pipe and/or component wall thickness. Check that dissimilar pipe and
component wall thicknesses that may occur at valves, equipment nozzles, and at
material spec changes are identified and transition pieces or taper bores are provided
if required. ASME Power Piping Code B31.1 Section 127.3C allows a 1/16” (.0625”)
internal pipe wall misalignment (each side) for welding without taper boring the
connecting pipe. Example of piping drawing identification of dissimilar wall thickness
taper bore: TAPER BORE SCH 160 PIPE TO MATCH SCH 80 VALVE
5.0 PIPING SYSTEM ROUTING AND LAYOUT CHECK
5.1 Interference Check. Check that the system is interference free by a visual review of the
model and that a recent electronic interference report from the model had been reviewed
and cleared. If a non 3D project, review all discipline reference drawings. If the pipe
routing is within an existing plant area, verify a field interference check was performed.
For hot piping verify pipe clearances in hot positions.
5.2 Thermal Analysis. For hot piping verify WorleyParsons Piping Engineering Department
has approved the thermal flexibility of the pipe. Checker is responsible to obtain pipe
CHECKING PIPING DRAWINGS PROCEDURE
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thermal movements and verify clearances in hot position and that pipe does not reverse
slope causing low point pockets. Thermal movement’s direction and distance shall be
noted on check prints in blue for future reference.
5.3 Hazardous Areas. Check that no electronic instrument, valve actuator, or other electronic
component within the pipe or attached to the pipe falls within a Hazardous Area of the
plant.
5.4 Plant Personnel Access, Construction Access, Maintenance Areas, and Safety. Check
that the pipe system layout does not obstruct plant personnel access, construction
access, and maintenance areas of the plant. Check that the pipe system lowest
appendage (including pipe support clamps) is above 6’-8” headroom and does not affect
plant safety.
5.5 Pump and Equipment Requirements. Check that the pipe system layout meets the
requirements of the connecting equipment vendor requirements or common practice.
The checker shall read all vendor criteria. Examples:
- Pump suction straight diameters, eccentric reducers
- Steam Turbine vendor requirements
- Check pipe system against Equipment Vendor P&ID if applicable
- Installation and Maintenance Manuals
5.6 System Discharge Points. Check that safety valve discharges, gas vents, etc are
discharged in a safe location that will not be harmful to personnel, structures, or
equipment. Confirm safety valve discharges do no impact noise abatement requirements.
Confirm gas (fuel gas, hydrogen) discharge points are indicated on hazardous area
location drawings.
5.7 Underground Pipe Burial Depth. Check that underground pipe has adequate cover to
protect from crushing from vehicle, railroad, and crane loads and is below frost depth.
5.8 Pipe Lanes. Check that pipe system layout is within established pipe north/south,
east/west pipe lanes and elevations established within the plant. Underground piping shall
have common bottom of pipe elevations for trenching.
5.9 Structural Gusset Plates. Check that the pipe system does not interfere with areas to be
occupied by structural gusset plates. Not all gusset plates are in the model and those
that are modeled may not represent the actual structural fabricators detail and
requirements. Checkers must do a visual model interference check at gusset plate areas
and interface with structural design to assure sufficient clearances.
5.10 Circulating Water Branch Component Reinforcement Plate clearance. Check for
potential interferences in the area of large pipe component reinforcement plates,
especially at crotch areas of laterals.
5.11 Underground Potable Water and Waste Water Separation. Check local and state
codes for separation requirements between underground potable water and waste
water systems to prevent pollution of potable water.
CHECKING PIPING DRAWINGS PROCEDURE
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5.12 HDPE Pipe Fitting Separation and Butterfly Valves. Check that there are pipe spools
between all HDPE pipe fittings to accommodate differences in physical dimensions
between HDPE fitting manufactures. Check that Butterfly Valves discs are not
obstructed from opening when connected to heavy wall HDPE pipe. Pipe spacers
may be required between the flange and valve body.
5.13 Clearance from vertical structural columns and walls. Check that pipe routing
maintains approximately 9 inches of clearance from vertical structural columns and walls
(including hot position) to allow space for field routed utilities.
5.14 ‘Olet Branch Dimensions. ‘ Olet type pipe branch fittings (weldolet, sweepolet, etc)
dimensions (run pipe centerline to the fitting outlet) are approximate because the
dimension varies by manufacture. Check that fitting to fitting design on the outlet of
the ‘olet branch fittings is not used. A pipe spool is required for adjustment by the pipe
fabricator to suit actual fitting dimensions while maintaining the overall geometry of
the pipe system.
5.15 Miscellaneous Items for Checking List. Includes commonly found piping isometric
Isogen software errors requiring manual annotation.
a) Orifice Flange pressure tap orientations incorrectly shown by Isogen.
b) Dimensions or dimension strings starting at pipe caps. Isogen dimension is
from cap work point (center of cap where blue line stops) but dimensions
on drawing appears to be from end of cap.
c) Eccentric Reducer offset dimensions incorrectly shown by Isogen do not
match actual fitting offsets as manufactured and should be deleted.
6.0 HOLDS CHECK
6.1 Holds. Check the location and limits of drawing HOLDs to areas of the drawing that are
incomplete or can not be verified and approved by the checker prior to issue due to
insufficient engineering, vendor, client or other discipline information. See Section 2.2.
6.2 Hold List. Check that all drawing holds are included in the Holds List for the project.
7.0 PIPING DRAWING CHECK LIST
7.1 Check List. A summary of the items identified in this procedure is provided in
ATTACHMENT 1 “Piping Drawing Check List”.
This list may be printed and used as a checking tool or record at the discretion of the
Mechanical Design Checker.
CHECKING PIPING DRAWINGS PROCEDURE
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ATTACHMENT 1

PIPING DRAWING CHECK LIST
DRAWING INFORMATION CHECK
3.1 Drawing Number
3.2 Drawing Revision Number/Letter and Description
3.3 Drawing Title Block Information
3.4 Drawing Signatures
3.5 Back Circles
3.6 Drawing Notes
3.7 Drawing Attributes
3.8 Spelling and Abbreviations
3.9 North Arrow
3.10 Project Specific Requirements
PIPING SYSTEM INFORMATION CHECK
4.1 System to P&ID Check
4.2 Equipment Location, Description, Tag Number
4.3 Equipment Nozzle Location, Tag Number, and Data
4.4 Piping Connection to Equipment Nozzle
4.5 Flow Direction Arrow
4.6 Completeness (All required dimensions, notes, information, details required for
construction)
4.7 Compliance with System Design Guides
4.8 Project Design Criteria Documents
4.9 Valve and In-Line Components
4.10 Valve, Flow Element, and In-Line Components Installation Requirements
4.11 Vents and Drains
4.12 Minimum Pipe Spool Lengths
4.13 Separation Distances for Branches
4.14 Instrument Connection Orientation and Access
4.15 Insulation and Insulation Support Lugs
Heat Tracing
Pipe Penetration Symbols and/or callout of core drilled openings
Waterstops
Slope
Pipe Supports and Welded Attachments
Material List on Isometrics
Insulating Flange Kits
Dissimilar Metal Welds
Dissimilar pipe and/or component wall thickness
CHECKING PIPING DRAWINGS PROCEDURE
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For Piping Tips and Info Visit http://piping-info.blogspot.com

ATTACHMENT 1 (CONTINUED)

PIPING DRAWING CHECKLIST
PIPING SYSTEM ROUTING AND LAYOUT CHECK
5.1 Interference Check
5.2 Thermal Analysis
5.3 Hazardous Areas
5.4 Plant Personnel Access, Construction Access, Maintenance Areas, and Safety
5.5 Pump and Equipment Requirements
5.6 System Discharge Points
5.7 Underground Pipe Burial Depth
5.8 Pipe Lanes
5.9 Structural Gusset Plates
5.10 Circulating Water Branch Component Reinforcement Plate clearance
5.11 Underground Potable Water and Waste Water Separation
5.12 HDPE Pipe Fitting Separation and Butterfly Valves
5.13 Clearance from vertical structural columns and walls
5.14 ‘Olet Branch Dimensions
5.15 Miscellaneous Items for Checking List
HOLDS CHECK
6.1 Holds
6.2 Holds list

http://www.scribd.com/doc/40176904/Checking-Piping-Drawings-Procedure#

Piperack Design Guidelines

Posted by Antony Thomas at Monday, October 25, 2010

Piperacks - General

whenever possible the Piperack shall be single level. On single level pipe racks, process piping shall be placed outsides with utility and service piping on the middle. Where multilevel racks are required, generally process lines shall be placed on the lower rack levels, and utility and service piping shall be placed on the upper rack level. However, draining considerations shall be taken into account when placing process lines on multilevel racks, by applying the following rules of thumb:

· If both ends of a process line are lower than the lower level, the line should be run in the lower level.

· Process lines that connect two nozzles elevated higher than the top level should be located in the top level.

· Process lines having one end lower than the lower level can run in either the lower or upper level.

Specific elevations shall be established and maintained for lines running the north/south direction, and different elevations for lines running east/west. North/south and east/west pipe racks shall intersect midway between deck levels. At every change of direction the piping should change elevation, but care should be taken to minimise pockets.

Sloping lines may be supported on the side of rack.

Piping should enter from above or below the rack level. Piping should not flat turn on or off the rack closing out space for installation of future lines. Lines requiring expansion loops should be located close to piperack columns and should be grouped together to enable use of common supports.

Onshore piping laid on sleepers at grade shall have minimum clearance of 400mm between bottom of pipe and finished grade.

Piping carrying caustic materials, chemicals, acids or similar services shall not be located near equipment or other piping with service temperatures exceeding 95°C and where avoidable should not be run over escape routes.

Piping smaller than DN50 shall not be run in pipe racks or sleeper ways. Where pipe sizes on racks require a support spacing which is less than the bent spacing, intermediate support beams shall be installed. Generally, small piping shall not be supported from larger piping. On sleeper ways, sleepers shall be spaced to suit the pipe requiring the smallest support span, but should not be spaced less than 3000mm apart.

Hot insulated lines should be grouped together and separated from cold lines.

Electrical and Instrument Cable trays will normally be run in or off the side of the piperacks. Piping Designers shall liaise with these disciplines to allocate these areas. Cable trays systems shall be kept away from hot lines.

SEE ALSO:

Piping Arrangement Around Piperack

PIPING DESIGNER JOB IN NORWAY

Posted by Antony Thomas at Friday, October 22, 2010

Ladies and Gentlemen,

MCL have a vacancy for 15 no Piping Designers as follows;

Details :                                                                                For our international drilling client, a world leader in the oil and gas industry

Location :                                                                             Stavanger Norway

Duration of Contract :                                                     6 months in Stavanger. 10 and 4 rotation is available. Start ASAP

Rate :                                                                                      Please provide me with your expected all inclusive hourly rate in GBP or NOK

Experience required                                                     Our client is seeking candidates with strong drilling rig design experience working on a green field drilling facility project to be located in UK waters

If this is of interest to you or to anyone you know, please send me your updated CV along with your availability (In a word format)

Many thanks,

Kind regards,

Donna.

MCL are expanding. We have worldwide vacancies for all disciplines and we are always looking for new CV's. If you have any colleagues/friends who maybe interested in registering with us then please do pass on my details. Many thanks.

Donna Voice -  Lead Recruitment Consultant
Metroworth Consulting Limited

Tel:0033 (0)553 012614  mobile 0033 608453510
E-mail donna@metroworth.com

Head Office Tel 0044 (0) 1252 792020, e-mail julian@metroworth.com)
Unit 6, Riverside , Omega Park , Alton , Hampshire , GU34 2UF .

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HOW TO MAKE SLOPE LINE IN PDMS

Posted by Antony Thomas at Saturday, October 16, 2010

SLOPING A PIPE 1/8” TO A FOOT
MAKE SURE THAT YOU DO A SAVE BEFORE START THIS PROCESS. THIS WILL ALLOW YOU TO
ABORT YOUR SESSION WITH OUT A SAVE.
1. SELECT THE PIPE THAT NEEDS TO BE SLOPED
 http://piping-info.blogspot.com/2010/10/how-to-make-slope-line-in-pdms.html
2. LAUNCH MENU OPTION “ORIENTATE – COMPONENT ‐ SLOPE

http://piping-info.blogspot.com/2010/10/how-to-make-slope-line-in-pdms.html
PDMS ---> Orientate -->> Component --> Slope

3. LOOK AT THE SLOPE DIALOG BOX NOTE THE FOLLOWING:
http://piping-info.blogspot.com/2010/10/how-to-make-slope-line-in-pdms.html
a. FALL IS SELECTED
b. THE VALUE IS 1/100 WHICH IS EQUIAL TO 1/8”
c. SLOPE IS SHOWN TO BE DOWN
d. SELECT APPLY TO EXCEPT THE VALUES – IF NEED BE YOU CAN DO A RESET WHICH WILL
REVERSE WHAT YOU HAD SET IT TO.
4. NOTE THAT THE LINE BETWEEN THE 90 ELLS IS NOW DASHED. THIS IS INDICATING THAT THE
ELBO’S ARE NOT ALLIGNED ANY LONGER.
http://piping-info.blogspot.com/2010/10/how-to-make-slope-line-in-pdms.html
5. NEED TO CONNECT POINT TWO ELBO TO POINT ONE ELBO
image
6. AFTER YOU DO THE CONNECT THIS IS WHAT IT WILL LOOK LIKE
http://piping-info.blogspot.com/2010/10/how-to-make-slope-line-in-pdms.html
7. WHILE KEEPING THE POINT 2 ELBO YOUR CE DO A “THRU ID CURSOR” YOU WILL BE RELOCATING
image THE RED ELBO WHICH IS OUR CURRENT ELEMENT “CE”
a. MAKE SURE THAT YOU CHANGE YOUR BRANCH DIRECTION BACK TO THE FLOW
DIRECTION.
8. THE LINE IS NOW SLOPED BUT NEEDS TO BE FIXED DUE TO THE DASH LINE BETWEEN THE TWO
ELBO’S
image
9. FIXING THE LINE IS EASY JUST NEED TO LINE UP THE ELBO’S BUT DOING A “THRO ID CURSOR”
SELECTION DOES NOT LINE THEM UP DUE TO THE SLOPING LINE. SO YOU WILL NEED TO DO A
MENU OPTION ORIENTATE – COMPONET – LEAVE TO CHECK TO MAKE SURE THAT THE LEAVE
OF THE SELECTED ELBO IN THIS CASE IS POINTING DOWN.

http://piping-info.blogspot.com/2010/10/how-to-make-slope-line-in-pdms.html

10. MAKING SURE THE DIRECTION OF THE SELECTED ELBO IN THIS EXAMPLE IS POINT DOWN
TOWARDS THE ELBO THAT WE ARE WANTING TO RECONNECT.
image
11. NOW WE WILL MEASURE THE OFFSET TO SEE HOW MUCH WE WILL NEED TO MOVE THE ELBO.
image
12. AT THE COMMAND YOU WILL TYPE THE FOLLOWING “BY E 17/32” WHILE KEEPING THE ELBO
YOUR CURRENT ELEMENT “CE”
image
13. AFTER YOU ENTER THE INFORMATION ON THE COMMAND LINE YOUR LINE SHOULD LIKE LIKE THE FOLLOWING
image
14. SNAP SHOT OF THE ISO SHOWING THAT THE LINE IS TRULY SLOPING 1/8” PER FOOT
http://piping-info.blogspot.com/2010/10/how-to-make-slope-line-in-pdms.html

PIPING QUESTIONS AND ANSWERS

Posted by Antony Thomas at Tuesday, October 12, 2010

Steam Piping Questions and Answers for the Piping Designers/Engineers

1. When installing steam traps, what is the ideal distance between the heat exchanger and the trap outlet?
12-36 inches (0.3-0.9 m).

2. After piping has been completed in a new steam system or branch, what should be done next?
Blow down the system.

3. Should a check valve be provided to allow automatic drainage of a portion of the steam system when pressure has been turned off?
No.

4. When should an automatic drain valve be used in conjunction with steam traps?
When the traps may be subjected to freezing conditions.

5. Will reduced differential pressure reduce trap capacity?
Yes, it will.

6. How much will 1 PSI (0.68 bar) of positive differential pressure lift condensate?
2 feet (0.6 m).

7. What do I need to consider for an outdoor installation?
Keep three things in mind: Do not oversize a steam trap; keep discharge lines as short as possible; and insulate all supply, discharge and return lines.

8. Two identical steam coils are in parallel in an air handler. Under those circumstances, can one trap serve both coils?
No

9. Should trap by-passes be a part of every trap installation?
Not necessarily.

10. Is it always best to oversize steam traps, just to be sure?
No.

11. Unions usually make it easy to replace a trap quickly. But when does a union slow down the replacement?
When it is installed in-line and the piping is well anchored.

12. What is "syphon drainage?"
Syphon drainage refers to installation of a trap above the device being drained.

13. Safety drain traps are often used when condensate must be lifted to an overhead return. Since they are connected in parallel, it stands to reason that the same pressures reach the primary trap and the safety drain trap. Why doesn't the safety drain discharge at the same time as the primary trap?
Because the safety drain discharge is installed above the primary trap.

14. A large heat exchanger is operated with a modulated steam pressure. Maximum steam pressure is 30 psig (2 bar). The condensate return line is located 12 feet (3.7 m) overhead. What trap is recommended?
A pumping trap plus F&T in series.

15. Is installing freeze-proof all-stainless traps a valid method to protect outdoor traps from freezing?
No.

16. When syphon drainage is necessary, should the syphon pipe be sized one size smaller than the nominal size for the trap?
Yes, but never less than 1/2" (15 mm).

17. Whenever possible, should condensate be pumped versus gravity drainage?
No.

18. What might result when two steam-consuming units are drained by a single trap?
Short circuiting.

19. When condensate is returned overhead, can a check valve sometimes be used?
Yes.

20. Does every 2 feet (0.6 m) of lift in syphon drainage increase pressure differential by 1 PSI (0.68 bar)?
No.

21. Should a steam trap be located as close to the drip point as possible?
Yes.

22. If a safety drain trap is used, should it be located below the primary trap?
No.

23. What is recommended when installing steam systems in freezing environments?
Keep trap discharge lines as short as possible, insulate all supply, discharge and return lines; and be sure there are no low points in the system that aren't drained.

24. Is it best to locate a steam trap below the drip point?
Yes.

25. If unions are used on both sides of the steam trap, should they be in-line?
No.

26. Does trapping by the letters apply only to IB traps?
No.

27. Can there be a problem draining two heat exchangers with a single trap?
Yes.

28. Should the diameter of the piping on the outlet of the heat exchanger always be reduced?
No.

29. What is a good way to provide an area where dirt and scale can fall out?
An extended drip leg below the takeoff to the trap.

30. Is syphon drainage when the trap must be installed above the drip point?
Yes.

31. What should I do when I have an elevated return line or modulating pressure service with insufficient positive pressure to evacuate the condensate?
Install a safety drain upstream of the primary trap, install a pumping trap downstream of the primary trap, and install a vented receiver and pump downstream of the primary trap.

SEE ALSO:

Piping Questions and Answers

PIPING QUIZ & ANSWERS

Labels:

PIPING AND PIPE SUPPORT SYSTEM -DOWNLOAD

Posted by Antony Thomas at Friday, October 08, 2010

DOWNLOAD THE BOOK PIPING AND PIPE SUPPORT SYSTEM

USEFUL PIPING GUIDE

TECHNICAL PIPING DOCUMENTS

PIPING LAYOUT

PIPING DESIGN DRAWINGS

PIPING ISOMETRIC DRAWINGS

STRESS ISOMETRICS

PIPING DESIGN LOADS

SUSTAINED LOADS WEIGHT

OCCASIONAL LOADS

LOAD COMBINATION

VIBRATION

DOWNLOAD THE FILE

Labels:

PDS 3D MODEL PIPING CHECKING

Posted by Antony Thomas at Wednesday, October 06, 2010

Table of Contents

  1. Introduction
  2. General
  3. General Safety
  4. Lines
  5. Valves
  6. Heat Exchangers/Reboilers
  7. Pumps and Compressor
  8. Vessels/Columns
  9. Furnaces/Boilers
  10. Relief System
  11. Electrical
  12. Instrumentation
  13. Civil/Structural
  14. Attachments
1. INTRODUCTION

The purpose of this document is to lay down a review procedure to ensure that the desired level of quality for the creation of a piping 3D is carried out in the engineering office and that sound design criteria for operability, safety and maintenance have been observed.

This check list may also be used for the recording of the check, appropriate space is left for any comments against a checked item in column “remarks”.

Additionally the form “Internal 3D Model Review” (see Attachment 1) and the form “Approved 3D Model Revisions from Internal 3D Model Review” (see Attachment 2) may be used for reporting purposes.

2. GENERAL

Check if “Interference Checking” facility has been run, if so, ask to see a printout of the report.

Check the 3D model against the latest issue of the plot plans, engineering and utility flow diagrams and line tables.

Follow the line up systematically and pay strict attention to details since many accidents are caused by seemingly minor items.

Mark on the engineering flow diagram all the lines, fittings and instrumentation which have been checked.

Make sure that when a modification, addition, elimination or reduction is considered, that is suits its purpose, is practical and also economical. When is doubt consult others.

Use this procedure for a number of items which can not be shown on diagrams. Please note that the checklist does not pretend to be complete and under no condition it shall overrule sound judgment.

Check that the color code has been used correctly.

Check if construction can build the unit(s) economically as designed.

Check that start up and shutdown problems have been considered and drain and let-down facilities have been provided.

Check the accessibility for operation, maintenance with mobile equipment and inspection.

Check location of future equipment.

Check location of drop out areas.

Check platforms and ladders.

Check that access ways and roads provide ample head room for vehicles, mobile equipment, etc. required for efficient and safe construction, operation and maintenance of the plant.

The policy of access to valves, blinds, manways, instruments, etc. shall been established during 3D model creation. Check 3D model for consistency of approach.

Package units are not normally modelled in detail and are usually show as a block. Ensure adequate space is available for access and for removal of components of package unit.

Check location of particularly noisy equipment, valves, etc. in relation to the frequency of visits by operating and maintenance personnel to the area.

Check the space required around fired heaters for soot blowing and decoking and clearance for burner removal.

Check that air fine coolers can be installed or handled during maintenance of plant by means of a mobile crane.

Check that adequate clearance and maintenance access is provided for plug removal tube cleaning, motors, V-belts, fans.

The 3D model shall also indicate junction boxes, cable trays and trunks, switch gears and power stations, control room, local panels, analyzer houses.

Check at final stage the package units, if vendor information has been included in the 3D model (use certified vendor drawings of lay out and detailed piping showing all instruments and local panel).

3. GENERAL SAFETY

Check that fire hydrants are not positioned at the ends of, or in the line with the ends of, horizontal vessels.

Check elevated equipment’s and platforms for the proper escape routes. Ensure unobstructed and short escape routes at grade.

Check that ladders and staircases have been installed on the outside of structures. Are staircases provided with turnaround landings?

Does escape traffic have to pass through structures? Check companies and/or governmental regulations for safety.

Check that remote shutdown and valve closing devices are installed at safe locations. Check that equipment concerned can be seen from these locations.

Check for “chimney gasp” between platforms and/or table tops.

Check that safety showers and eye baths are located near equipment containing aggressive chemicals (e.g. caustic, ADIP, MEA, HCl, h4SO4, etc.).

Check accessibility of the unit for mobile fire-fighting equipment and rescue work.

Avoid head bumpers, shin splitters and tripping hazards.

Check that emergency/smothering steam header block valves are at safe distance from protected equipment (e.g. in hydrogen service or near fired heaters). A steam header block valve station could be fire shielded, if required, by brick or concrete wall.

Make sure that operators manipulating drain valves can see the emerging affluent. The required level gauges shall be visible and funnels must be provided.

Check that water trapped in goosenecks cannot be displaced by hydrocarbons.

Check that utility stations have been provided, including those at the main operation platforms, e.g. for the connection of steam lances.

Check barometric seal height of vacuum for liquids other than water. Ensure that the liquid can be drained as well. Important for the design of the structure elevation.

Check that platforms have been provided at places where work is expected between maintenance stops.

Check that steam exhaust cannot cause personnel hazards either from spraying droplets of hot water or causing icy or wet surfaces.

Check that steam rings are foreseen at flanges in overhead lines of thermal cracking units and for lines in hydrogen service.

Be alert for equipment supported on continuous platforms when sections of these platforms are supported on structures subject to different thermal expansion.

Check that continuously operating vent stack are higher than the highest nearby structure (within a safe distance).

Check the location of liquid relief valves, since its actual height influences the required set pressure.

Check the location of toxic gases (h4S, VCM etc.) monitoring points if applicable.

Check that drains of light hydrocarbons (propane, butane) are protected against freezing (e.g. double valves).

Check that firewalls have been located correctly.

Check that levers of plug-and ball valves are not hampering operators on walkways or platforms, levers shall move in the same plane as the piping lay out.

Check that steam for purging of lines and equipment (e.g. snuffing steam, emergency steam) is dry, provide automatic trap stations with drain assembly upstream of last block valve in steamline.

Check that process ventlines are routed and oriented to safe locations, (3 meter above highest platform), watch nearest platforms and prevailing wind direction.

Check location of manholes with platforms and ladders in respect to safe escape route.

In case of location of water cooled equipment at high elevated platforms, check if the normal cooling water pressure is suitable for this duty, otherwise a booster pump shall be installed.

To prevent vacuum in equipment located at high elevations, due to siphon operation of the fluid, install a vacuum breaker to suck in air or a process gas.

4. LINES

Check that piping entering and leaving the unit is logically grouped together.

Check that valves, blinds, flushing/drain and instrument connections are properly located. Check especially so called manifolds and large control valves. Check in cases where spades are used ISO spectacle blinds, that piping system are flexible enough to insert these spades.

Check that piping subject to thermal expansion is anchored at plot limits.

Check elevation of overhead piping and horizontal clearance of access and/or walkways.

Check that start-up/circulation lines are short.

Check that dead ends have been avoided. Check if system can be flushed and drained.

Check that vapor lines (inclusive steam) branch off from the top of main lines. Prevent pockets in vapor lines. Keep lines sloping to a drum or install drainpoints (driplegs).

Check that piping subject to thermal expansion is flexible enough. Are supports adequate?

Check if nozzles and branches on expanding piping are not installed near obstructions, support beams, etc. (to avoid ripping off). Are these lines properly anchored. Are stresses on equipment nozzles within limits.

Check for pockets in vapor lines where condensation may occur. Has external heating been applied on those pockets which can not be avoided?

Check that long lines attached to small bore nipples are properly supported to prevent breakage due to vibration.

Check that lines do not pass through table top, but run alongside. If impossible group lines together passing via a sleeve.

Check that dead end sections have been avoided (e.g. in water lines).

Check that piping has been designed to permit easy drainage, venting, flushing, testing, maintenance, insulation, painting.

Check position of eccentric reducers. Normally straight side on bottom of horizontal lines except in pump suction lines where vapor pockets may cause calibration in the pump.

Check that compressor suction lines slope toward knockout drum.

Check that small bore cooling water lines branch off from top of the header. (This to prevent plugging).

Check that stripping steam lines are short and horizontal or sloping from the last valve.

Ascertain that two phase flow vertical piping has been checked for flow stability.

Check that hydraulic (water) hammer conditions have been checked.

Check that all lines have been properly numbered.

Check that high temperature and special material lines have been stress analyzed.

Check that gas is prevented from entering cooling water system.

Check absorber gas feed inlets for pockets near the inlet to avoid absorbent in the gas line.

Check that piping with instrument connections has been laid so that these connections are easily accessible. Check if necessary platforms and walkways have been provided.

Check anchoring of piping discharging to atmosphere. Pay special attention to screwed piping.

Check that vacuum equipment steam jets has been hooked up directly to the steam mains, i.e. without any intermediate connections which may suck in air. This is not applicable for vacuum pumps.

Check (for the same reason) that venting of the gas compressor suction piping has been avoided.

Check all coordinates on piping for correct configuration and clearances.

Check that service stations have been properly located. Design also for winterizing (water/steam/air in one insulated box).

Check for rotary equipment that suction and discharge piping are properly supported.

Check clearance between piping and structural steel with fireproofing.

Check that thermosiphon reboilers have been located such that minimum pipe distances and equal vapor distribution are achieved.

Check required straight piping runs to distributor piping in distillation columns. Only in vertical plains are bends allowed within this straight run.

If a vent is required on an exchanger for periodically purging of noncondensable vapors, this vent valve shall be accessible, vent plus line shall be shown on 3D model.

Check piping arrangements on shell and tube side of exchangers carefully for correct flow of fluids and proper operation of exchangers.

If symmetrical piping hook up is required to exchangers, airfines or double suction of pump, check this carefully.

Keep length of suction piping to pumps to a minimum and prevent pockets.

Check location of break flanges on piping at shell and tube exchangers and aircoolers to facilitate bundle removal.

Check that number of passes in a heater are shown and if necessary check that piping is symmetrical.

Check that location of isolating valves and valves of snuffing steam and emergency steam are at 15 meter distance from the heater at grade and accessible.

Avoid dead legs in heavy fuel oil lines and waste gas lines.

In case of steam jacketed sulphur lines provide T-pieces or cross pieces at the end for cleaning the sulphur lines by rigging.

Check location of relief valves and their good accessibility for servicing.

Check location of local panels for safe operation and good accessibility.

5. VALVES

Check that valves in overhead pipe tracks have been avoided to the maximum extent.

Check that chain operated valves have been avoided where possible.

Check that all valves are installed with the steam installed with the stem pointing upwards or horizontally.

Check that hand wheels are easily accessible for operation and yet not obstructing walkways or platforms.
Check also steams, especially in open position.

Check that valves for emergency operations are workable grade level.

Check that valves that need frequent attention are easily accessible.

Check valves in vertical lines for possible water traps.

Check when reduced port valves are installed, that piping is self draining on both sides of the valve.

Check that hot oil block valves are well accessible in view of fire risk.

Check that control valve assemblies are located at ground level or on first platform (except when required otherwise for process reasons).

Check that installation of valves outboard of elevated platforms has been avoided.

Check that valves or double block and bleeders have been installed in utility connections to process equipment and lines.

Check that spring loaded and/or extra block valves have been used where valves may freeze-up when draining or sampling.

Check that process vents and drains are shown.

Check location /installation of check valves in ditch. lines of pumps or near connection of lines, for example connection of condensate lines from traps to condensate collecting header near to the header.

Check levers of plug-or ball valves, these shall not obstruct walkways, platforms etc. Levers shall move in the same plane as the piping lay out.

6. HEAT EXCHANGERS/REBOILERS

Check that piping arrangement is acceptable with respect to the removal of shell and channel covers as well as the withdrawal of tube bundles.

Check whether bundles can be pulled and lowered safely from platforms and stacked arrangements (obstructions, hydrants).

Check stacked heat exchangers for the possibility of oil spills on hot equipment beneath it, especially during maintenance work.

Check accessibility to exchangers for maintenance, bundle removal/cleaning, etc.

For a thermosiphon check reboiler check the elevation difference between draw-off pan and reboiler for driving force

If a vent is required on the exchanger for periodically purging of noncondensable vapors, this vent valve shall be accessible. Vent also to be shown on 3D model

Cold fluid enters the exchanger at the bottom and leaves it from the top

Check crane access to airfin coolers for maintenance or construction.

Check symmetrical piping hook-up to several bundles in an airfin cooler or to exchangers in parallel operation. Dead legs in capped headers shall be kept to a minimum or be avoided, use elbow ISO tees at the end of the header. Pockets in outlet piping of aircooled or water cooled condensers must be avoided as well as in the hot vapor bypass lines.

7. PUMPS AND COMPRESSOR

Check that flow in suction piping is as smooth as possible

Check that high points in pump suction lines have been avoided

Check that valving around pumps is logical and operable

Check volumes which must be drained when a filter or a pump needs to be opened

Check that pumps can be safely and easily handled for maintenance

Pay special attention to spading-off possibilities

Check that priming facilities are adequate

Check that facilities have been provided for gradual heating prior to start

Check hookup of suction line on double suction pump. Piping layout to be as follows for side inlet:

  • Straight length from suction flange until bend to be 3D (D = diameter nozzle pipe), no reducer allowed.

  • In vertical pipe reducer, strainer and valve can be installed.
  • For top inlet straight length = 5D if suction line runs in length direction of pump motor and 3D if suction line runs in same plane as pumps impeller(s). Upstream of the bend in the suction line the strainer, valve etc. can be installed.

Check that pump operating under vacuum are provided with high point vents, which are connected via a vent line to the top of suction vessel

For a vertical pumps no straight length is required.

If pump handle liquids with temperatures above auto-ignition, this pumps shall be located in safe-areas (not underneath pipe rack) and widely spaced from other pumps. Good accessibility for fire fighting is required and above pumps a sprinkler system shall be installed

Piping to compressors. Pockets shall be prevented, lines shall be slope to suction drum and suction line shall mostly be steamtraced. Check vendor drawings carefully

Check all flushing, cooling, quenching requirements of pumps and compressors

Check that sufficient space is available for removal of filters from strainers

Suctions lines of pumps to be of minimum length

Check NPSH of pumps

If two pumps are parallel operating the piping hookup at suction and discharge side shall be symmetrical.

  • On reciprocating compressors safety valves must be located upstream of the discharge block valve.

8. VESSELS/COLUMNS

Check location of vents as well as direction of outcoming streams

Check positions of drain nozzles. Keep them clear from areas where heavy equipment such as fork lift trucks may work

Check that manways are within reach of hoisting equipment

Check that instrument tappings and local instruments are readily accessible

Check that the lines can follow the expansion when heating up/ cooling down. Pay special attention to supports on hot respectively cold structures. Check free movement of platforms

Check that staircases, platforms, ladders etc. are logically located

Check that the layout of platforms , ladders, piping, relief sets, etc. is in accordance with the specified basis for wind and earthquake load calculations

Check location and elevation of all piping- and instrument nozzles against requisition of equipment and drawing

Check that spectacle blinds or spades are installed (indicated) at the nozzles for pressure test or isolation purposes. Normally required with columns

Stripping steam to the columns shall be dry; install KO pot at grade provided with automatic steam traps and drain valve and provide a minimum distance insulated steamline in vertical run without pockets to the steam inlet nozzle of the column.

Check that sufficient space is available for column erection activities

Check that consideration has been given to loading and unloading of catalysts, packing, internal etc.

9. FURNACES/BOILERS

Check that piping does not obstruct observation windows, access doors, header box covers, etc

Check that space is available for tube withdrawal and cleaning

Check that piping at burners is arranged so that insertion/removal of lighting torches and burner guns is not hampered

Pay special attention to safety of fuel system:

  • Check that heavy fuel and LBF system are sufficiently segregated

  • Check that provisions are made to adequately prevent liquid fuels from entering steam and gas system

  • Are locations of flame arrestors, straight pipe length etc. of low pressure and waste gas in accordance with specifications?

Check that emergency/smothering steam valve manifolds are at safe distance. Steam shall be dry. Install upstream of manifold at low point a drain valve and automatic steam trap

Check that dry emergency steam is available

Check that :

  • Branch off nozzles are positioned on top of main

  • Steam line are under continuous slope (no pockets)

  • Sufficient steam traps and drain points are provided

Check that fuel and atomizing steam cocks are within hand reach when looking at the burners through the observation windows

Check that the local emergency shutdown switch is at a safe location

Check that safety logic (for heater start-up and shut-down) is not located below (vertical) furnace. Normally such a logic is located in a local panel at safe distance (15 meter) from a fired heater

One complete burner hookup shall be shown per heater including all instruments and all provisions for safe startup, operation and shutdown of the heater with associated equipment (e.g. fans).

Check final certified vendor drawings for equipment correctness.

Check prescribed safety distances, e.g. for example:

  • 12 meter to catch basins

  • 15 meter to process equipment exclusive airfin coolers

  • 22 meter to airfin coolers

Check that the damper can be operated from grade.

Check that the flue gas oxygen analyzer is located at grade.

Check heater or boiler location for maintenance and construction accessibility and also for decoking, regeneration or soot blowing activities.

10. RELIEF SYSTEM

Check that inlet lines to relief valves are self draining into process equipment.

Is its proper functioning not hampered by the nature of the process fluid? The allowable pressure drop across the inlet line of relief valve is limited to 3% of the set pressure (at maximum capacity). If pressure drop is too high, the line size shall be increased.

Check accessibility of the relief valves for maintenance and inspection. Check if relief valves have been installed at proper elevations. Distinguish between valves releasing to atmosphere or relief deader.

Check pressure relief discharging to atmosphere for safe location and direction.

Check that discharge pipe is drainable. If so, does drain not impinge on other equipment? Have measures been taken to avoid freezing of moisture on relief valve seats in low temperature service?

Check tail pipes for adequate support against reaction forces.

Check that the tail end of vent pipe is within the action radius of fire extinguishing equipment. If not, has a snuffing steam connection been provided?

Check that length of piping is minimized for safety relief valves discharging into a closed system.

Check that outlet line from relief is self draining into flare header. Check if connections are made on top of the flare header.

Check that flare lines have no pockets and that they are sloping to the flare knockout drum.

The back pressure on the relief valves (calculated during the design) shall be checked with the actual layout of the flare system.

Check destination of outlets from 1 ”x 1” thermal relief valves to atmosphere or grade for safety.

In case hooked up to the vessel, check if steamtracing is required to prevent plugging.

Check locking devices of the valves at inlet/outlet of the relief valves.

Check that valves with Castell lock system (or other system) are properly installed.

Check that safety relief valves and inlet/outlet lines adequately supported.

Check that tail pipes of relief valves require weather protection cap.

Check that the proper type of the relief valve has been specified, for example in waxy service piston type in view of plugging.

In case of 1 ”x 1” thermal relief valves, the inlet of the relief valve shall be self-draining to the process line, the discharge line can be connected to a collecting header which shall be discharging under slope without pockets to a vessel. Check if inlet and outlet lines of relief valves shall be steamtraced.

11. ELECTRICAL

Check that cable trunkings are properly located and not obstructed by equipment etc.

Columns of pipe racks are normally used to install junction boxes for both electrical and instrumentation purposes.

Check that orientation and access is not hampered by location of control valve station, steamtracing stations, utility stations or other piping lay-outs.

12. INSTRUMENTATION

Check that all instruments are on 3D model and have been correctly tagged.

Check that instrument cable trunkings are properly routed and in accordance with applicable instrument drawings.

Check that local control panels, main junction boxes, etc. are properly located.

Check location and accessibility for operation and maintenance of all instruments. Mind removable piping on both sides of reactors (swing elbow), here special design is required.

Check straight length of orifice runs.

Check clearance above external displacers for removal of floats.

Check platform clearance around level gauges, control valve stations, relief valve station, especially for Camflex type control valves with bypass.

Show all personnel protection, gas detection points (sniffing points).

13. CIVIL/STRUCTURAL

Check that all structures with bracing and pipe racks are shown, inclusive fireproofing.

Check that all plinths for equipment and structures are shown.

Check that all table tops are shown.

Check location of analyzer house(s), if fast loop requirements for correct measurements (samples) will be met.

Check that bracing of steel does not form an obstruction.

14. ATTACHMENTS
  1. Internal 3D Model Review

  2. Approved 3D Model Revisions from Internal 3D Model Review

  3. Definition of Percentage Completion

Internal Model Review

attachment not available ??

Approved Model Revisions From Internal Model Review

attachment not available ??

Definition of Percentage Completion

The following description is a definition of each percentage complete stage of the piping 3D model. Company practice normal practice is to make 3D model reviews at 30, 60, 90 and 100% completion.

Definitions
BASIC

  • Plot Plan Attached to 3D Models
  • Battery limits located
  • All major equipment located
  • Major structure shown
  • Major pipe rack shown

30% Completion

  • Comments from Client BASIC 3D model review incorporated
  • Large bore critical process lines studies on the 3D model
  • Piping studies 15 - 20% complete
  • Location of unit access ways for mobile maintenance and fire fighting equipment shown
  • Comments from Client for operation and maintenance incorporated

60% Completion

  • Comments from Client 30% 3D model review incorporated
  • Ready for Client’s comments for operation and maintenance
  • All equipment located
  • Piping studies 70% completed
  • All large bore process lines and utility mains shown
  • In-line instruments shown for lines installed
  • Instruments on equipment located. Local panels shown
  • Main cable trays installed
  • All structures (concrete and steel), ladders and platforms shown
  • All pipe racks shown

90% Completion

  • Comments from Client 60% 3D model review incorporated
  • All piping shown
  • Safety showers, eye baths or jump-in baths shown
  • Piping studies 100% complete
  • Instrumentation, including cable trays 100% complete. Electrical cable trays 100% complete
  • All major pipe supports located

100% Completion

  • Client’s final comments from 90% 3D model review incorporated
  • 3D model updated to latest issue of PEFS’s, PEUFS’s, line tables, arrangement drawings and final equipment drawings
  • All sprinkler mainheaders shown

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