Piping Engineering / Design Blog.



Posted by Antony Thomas at Friday, June 29, 2012




Keywords: pipe fitters manual, fitters manual, pipe fitters hand book

Typical Process Vent / Hydro Test Vent & Drain Assemblies

Posted by Antony Thomas at Wednesday, June 27, 2012

Typical Process Vent / Hydro Test Vent & Drain Assemblies

Classification of Vent Assembly:

Vent assemblies can be broadly classified as Process Vents and Hydrostatic Test Vents.

Process Vent:

During the process of a system, some vents needs to be operated very often (e.g start-up, shutdown and maintenance, etc.).  So there should be a proper venting assembly for the whole life cycle of the piping system.  This assembly should have valve so that after venting, the valve can be closed and continue the normal operation. Air must also be released from pipe to allow filling and admitted to permit draining or pumping out liquids. Selection of Process vent assembly is based on the piping class. Some of the typical Process Vent assemblies are shown below.

Process Vent Assembly-1 & 2
Process Vent Assembly-1 & 2

Process Vent Assembly-3 & 4
Process Vent Assembly-3 & 4

Process Vent Assembly- 5 & 6
Process Vent Assembly-5 & 6

Hydro Test Vent:

During the Hydro Test of a piping system, the air inside the pipe will be trapped at higher elevations when supplying the water inside the pipe. This trapped air needs to be removed before testing. For these purpose Hydro Vents will be provided at each higher elevations of a piping system. Vents are needed to let air in and out of systems.  Some type of hydro test vent caps are seal welded after the testing. Typical Hydro Test Vent assemblies are shown below.

Hydro Test Vent Assembly-1 & 2
Hydro Test Vent Assembly-1 & 2

Hydro Test Vent Assembly- 3 & 4
Hydro Test Vent Assembly- 3 & 4

Hydro Test Vent Assembly-5
Hydro Test Vent Assembly-5

Drain Assembly:

Normally drain assemblies are provided in a piping system to drain out the process liquid as well as the water after the hydro test. The Hydro test drains are used as process drains during the process cycle. Typical Drain assemblies are shown below.

Drain Assembly-1 & 2
Drain Assembly-1 & 2

Drain Assembly- 3 & 4
Drain Assembly- 3 & 4

Drain Assembly- 5 & 6
Drain Assembly- 5 & 6

Hydro Test Vent/Drain Assembly Locations:

PIDs show only Process vents such as vacuum breakers and process drains. Positions of the required vent and drain points are established on the piping drawings. Typical hydro test vent assembly and drain assembly locations are shown below for reference purpose.

Hydro Test Vent/Drain Assembly Locations

Hydro Test Vent/Drain Assembly Locations

If you like the above post please click the Google +1 rating and share the vital info among other pipers. Please feel free to comment.

Sr. PDMS Piping Layout Designers–Norway

Posted by Antony Thomas at Thursday, June 21, 2012

Senior PDMS Piping & Layout Designers – Aker Solutions

Job ID #: 3679

Country: Norway

Job category: Technical/Engineering

Location: Stavanger

Position type: Employee

Department: GG-085-Piping & Layout SVG

Experience required: 3 - 5 Years


Education required: Bachelors  Degree



Aker Solutions provides oilfield products, systems and services for customers in the oil and gas industry world-wide. The company's knowledge and technologies span from reservoir to production and through the life of a field. Aker Solutions brings together engineering and technologies for oil and gas drilling, field development and production. The company employs approximately 23 500 people in more than 30 countries. They apply the knowledge and create and use technologies that deliver their customers' solutions. 

We are looking for individuals who are prepared to take a position. Not only a position within Aker Solutions, but also a position on the exciting challenges the global oil and gas industry face now and in the future 

We have open permanent/staff positions as Senior PDMS Piping & Layout designers in the business area "Maintenance, Modifications and Operations" within Aker Solutions. 

The Piping & Layout department in Stavanger consists of approximately 150 well qualified and experienced staff engineers. They work in various small and large projects which give each employee several career opportunities both onshore and offshore.
We are looking for candidates with minimum 5 years of relevant experience.

Responsibilities and tasks 

* Design and 3D modelling of piping systems
• Area layout and 3D modelling of equipment
• Estimation of piping activities
• Offshore surveys as required by the various projects
• Communication with client
• Ensure that interfaces towards other disciplines are handled in an efficient way
• Generate drawings and other documents according to project requirements

Qualifications & personal attributes 

• Relevant technical education
• Ability to work independently in all phases of the project; study, execution 
• Experience from modification projects in the  offshore industry, preferably from the North Sea
• Experience from performing site-surveys, pipe-routing through existing areas and locating tie-in positions to achieve a clash-free design is mandatory
• Good knowledge of PDMS, general computer technology and experience from piping design 
• Knowledge to governing regulations and standards; ASME, NORSOK etc
• Applicants must have good oral and written skills in the English language and new employees from foreign countries must be willing to attend training in the Norwegian language
• All Aker Solutions employees must have a permanent address in Norway

We offer 

•Friendly colleagues in an industry with a bright future
•An environment where you are encouraged to develop your skills and share your knowledge with your colleagues
•Competitive benefits and strong focus on work-life balance

Contact information 

For more information please contact Dept. Manager tel. (+47) 51 89 79 84

Please attach your CV, cover letter and diploma when applying online


Renaming Elements and their Offspring in PDMS

Posted by Antony Thomas at Wednesday, June 20, 2012

Renaming Elements and their Offspring in PDMS


Command: RENAME

Description: The name of the current element and offspring can be modified where a standard name part occurs.




In the below example if you Copy & Paste STRU /PS-202-001 then

STRU /Copy-of-PS-202-001 will be created.


Renaming Elements and their Offspring in PDMS


To rename this type the below command in Command Window


PDMS command window


RENAME ALL /Copy-of-PS-202-001 /PS-202-002


Renaming Elements and their Offspring in PDMS


The above snapshot shows all occurrences of /Copy-of-PS-202-001 in the names of the current element and its offspring changed to


Senior Piping Designer Qatar–QP

Posted by Antony Thomas at Tuesday, June 19, 2012

Sr. Piping Designer Job in Qatar Petroleum

Industry Type

Recruitment / Placement Firm

Functional Area


Location of Job


Job Description

Preparation of Piping as-built / conceptual / detail drawings for offshore and onshore oil and gas facilities. Compile and consolidate project drawings to core as-built drawings on CAD with respect to deletion/addition to the facility, as part of Master Engineering Record verification and update process. Assist specialist engineers in applying designs for FEED by active participation and site survey of existing engineering asset information.

Desired Candidate's Profile




Minimum of 8 years experience in Oil and Gas sector, using intelligent 3D modeling solutions from Inter graph, Bentley, or AVEVA with hands on experience in Catalogs and Spec Creation, Sketches,Piping/Equipment layouts, isometrics, Nozzle schedules, Datasheets etc. Experience in Auto CAD, Micro Station, and exposure to Database linked software tools usage. Knowledge of Equipment and Process Piping Standards and PFDs/P & IDs is necessary. Exposure to Document Management System at an advanced level preferred.


8 - 9 years


Basic - Bachelor of Technology/Engineering


Sr. PDS Piping Designer–Mustang

Posted by Antony Thomas at

Sr. Piping Designer (PDS) – Mustang

Al Khobar - Saudi Arabia

Responsible for: 
Delivering piping design input for projects.
Main purpose of job:
To provide support to a project in all aspects of piping design and layout
• Production of designs for piping systems and equipment layouts for procurement, construction, installation, commissioning and safe operation
• Produce construction deliverables for piping systems and equipment layouts using 2D and 3D CAD systems
• Ensures compliance with piping and layout specifications and guidelines as well as applicable code requirements and national/international standards
• Reports on work status/ problem areas/ needs
• Develop and maintain discipline project documentation and design data records
• File and maintain project records (engineering sketches, layouts, studies etc)
• Assists in the development of discipline project documentation and design data records
• Manages Deliverables issue and transmittal records
• Track deliverable status, model progress, studies, co-ordination and any other design tasks not tied directly to deliverables
• Attend project model review meetings
• Attend project meetings as applicable and keep notes of same
• Interface with other disciplines as required
• Liaison with and reporting to Piping Lead Designer

Contact Details



Posted by Antony Thomas at Saturday, June 09, 2012


Check valve is used to stop back flow in a piping system. This is also called Non return Valve (NRV)
Check valves are available in the following designs:
ü  Swing Check Valves
ü  Tilting Disk Check Valves
ü  Wafer Check Valves
ü  Disk Check
ü  Piston Check
ü  Ball Check
ü  Duo-Check Valves
ü  Non-Slam Check Valves


Swing Check Valve DiagramSwing Check Valve Picture
Swing Check Valves are available in straight body design and y-pattern design. The disk is suspended from the body by means of a hinge pin and seals against the seat which is integral with the body. These valves are typically used in sizes 2 inches and over. Swing check valves can be installed in both horizontal and vertical position. They are not suitable for pulsating flow.
Closure response of swing check valve is slower compared to lift check valve due to longer disc travel and inertia of disk.
Industry Codes and Standards
·         Valve Design:     BS 1868 / API 6D
·         Pressure Testing:             BS 6755-I
·         Face To Face:     ANSI B 16.10
·         Flange Drilling:   ANSI B 16.5 / BS 10 Table / DIN / IS / JIS Std.
·         Butt Weld End:  ANSI B 16.25
·         Face to Face: ANSI B 16.10
·         Socket Weld End: ANSI B 16.11
·         Screwed End: ANSI B 1.20.1(BSP/NPT)



Tilting Disk Check Valves fit between two flanges and provide a compact installation for large diameter applications. These valves can be installed in horizontal and vertical lines. They provide a quick closing response and are particularly suited for pulsating flows with compressible fluids.
· Face to Face: ANSI B 16.10


Wafer Type Check Valve has short face-to-face dimensions and low weight allows a simple space saving installation between the companion flanges. The valves are suitable to mounting between weld neck or slip on type companion flanges of different standards.
They are specially developed for applications where a low-pressure loss is essential. Opening and closing of the valve will take place at an extremely low-pressure difference over the valve disc. The eccentric disc shaft combination with the disc seat guarantees a positive shut off returning media. Wafer check valves are becoming the preferred type of check valve for most applications, due to their compact design and relatively low cost.

· Face to Face: ANSI B 16.10


The Single Disc Check Valve (Wafer Type Disc Check Valve) consists of four main components: the body, a disc, a star guide and a spring. The Disc check valves are opened by the pressure of fluid and closed through compression spring as soon as flow stops thus preventing reverse flow.
The design of Wafer Design, Sandwich Type Single Disc Spring Loaded Check Valves allows them to be installed between any flanges of different standard and in any position; including vertical pipelines where the fluid flows downwards.


Piston Check valves are generally used to protect pumps or similar equipment, allowing the flow only in one direction and preventing flow reversal due to back pressure. The piston check valves are designed with globe valve bodies, producing an increased drop pressure in the pipeline. This design provides a tight seal as well as a fast reaction to the closure impulse. Metal seated check valves may not provide drop tight sealing when used in gas system or fluid system with low back flow pressure or fluids containing particles.
· Face to Face: ANSI B 16.10


The ball check valve is one of the few check valves that works well in both water and wastewater applications. Ball check valves are simple in operation and commonly used on small pumps and in low head systems. Consider adding an optional roll-bar to the piping system for safety; ball check valves have the highest tendency to slam due to the ball's high inertia long stroke. When ball check valves encounter high pressures and dynamics, severe slamming may result.
· Face to Face: ANSI B 16.10


dual plate check valveDuo CHECK VALVE PICTURE
The Dual Plate, Wafer Check Valve employs two-spring-loaded plates hinged on a central hinge pin. When the flow decreases, the plates close by the action of torsion spring before flow reversal takes place. All features put together make the Dual Plate Check Valve as the most efficient & versatile design. It is also referred to as SILENT CHECK VALVE. It is much easier to install between standard gaskets and line flanges, and therefore is more cost effective to install and to maintain. Its design complies with API 594 and API 6D, testing with API 598. It is also called as Butterfly Check Valve.


It is essential to see the closing characteristic of the valve with the dynamics of the pumping system.

non-slam check valve 

The swing check valve closes abruptly because of gravity, and causes pressure surge resulting in shock waves. These high pressure waves causes sever stress on the piping system. This problem can be minimized by installing a Non-Slam type check valve. Non-Slam check valve do not rely on gravity. As the upstream velocity of the fluid slows the spring assist on the valve start to close the disc. By the time the upstream velocity comes to 0, the disc is completely closed. With the reverse flow eliminated, the force necessary to produce water hammer on either side of the valve are substantially reduced.


If you like this article.. please press g+ below..Thanks

Check valve disc type, weighted check valves, wafer type check valve, swing type non slam valve, piston type check valve, nozzle type check valve, duo check valve wafer type.

Onshore PDS Piping Designer- Bellaire, TX

Posted by Antony Thomas at Monday, June 04, 2012

Job Title: Senior Principal Designer-PDS
Job Type Full-time
Location of Job: US - TX - Bellaire Bellaire,US 77401
Job Description •Onshore Piping Designer

•Provide technical support, clarification and interpretation of task, code and standards requirements for all discipline design and drafting activities.

•Reviews assigned projects discipline deliverables for technical quality, accuracy and compliance with Company standards.

•Monitors assigned projects discipline manpower requirements to support established budgets and schedule. Assure that all assigned discipline personnel are indoctrinated and current with Company, department, discipline, and project standards and procedures.

•Review and approve assigned project discipline work scopes, work approaches, and estimates.

•Review and approve submitted discipline Work Share Packages for assigned projects. With the Production Unit Lead Discipline Engineer, prepares man hour estimates and clarifications/exceptions in support of Company project bid proposals.

•Develops and maintains discipline design standards, procedures, and guides.

•Prepares performance appraisals for assigned personnel and administers salary adjustments per approved plan.

•Participates in the interviewing and hiring of new discipline design personnel.

•Provides mentoring, Company orientation, and on-the-job training for assigned personnel.

Job Requirements
•Knowledge of brown field onshore  work. Minimum 2 years experience using PDS.

•Typically fifteen years progressively responsible discipline related design experience; BS degree or completion of technical courses with 10+ years of relevant experience, including supervisory or lead position experience.

•Senior Principal level design position responsible for supervising teams as well as performing difficult and complex work assignments involving independent judgment to determine a course of action consistent with established functional and organization's policies and goals. Strong understanding of basic engineering and/or design/drafting concepts. Has general understanding of other disciplines' roles in the design process. Able to complete tasks in accordance with project procedures and recognized codes and standards. Able to discuss routine technical problems and communicate effectively with immediate supervisor and other project personnel.

•Able to utilize advanced PC, 2D CAD, and 3D CAD tools (if applicable), and other applicable hardware and software to perform duties. Understand and oversee advanced design as well as providing technical direction and training. Ability to meet deadlines and manage priorities is critical. Strong organizational and presentation skills as well as the ability to effectively communicate and take a leadership role over the group for which they have supervisory responsibilities.

•Commitment to customer service and ability to assist others in applying knowledge and understanding in solving functional problems within area of expertise. Ability to maintain confidential information critical.

•Generally characterized as a "Senior Principal" with ability to discover issues and recommend solutions to business problems uncovered during course of performing assignments. Has less independent contributor responsibilities and more supervisory responsibilities. Provides increasing levels of oversight, expertise, guidance and counseling. Responsible for assigning lead role, scheduling, checking, technical training, progress reports, performance evaluations, etc.

•Typically will regularly interface with departmental staff and upper management, and frequently with outside customers.

•General attributes required of all WorleyParsons employees involved in leadership include: Zero Harm, Action Orientation, Building Effective Business Relationships, Commitment, Customer Focus, Dealing with Change, Drive for Results, Integrity and Trust, and Leadership Skills including Strategic Ability, Managing Vision & Purpose, Command Skills, and Global Business Knowledge.

•Willingness to travel or to accept field assignments preferred.

•Ability to work effectively in teams.

•Onshore piping design experience

•PDS  Piping designer

Designer, Senior Principal-PDS - Req. # : 22542

Related Posts Plugin for WordPress, Blogger... follow us in feedly

Popular Posts

Piping Info