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How do you Calculate the Width of the Pipe Rack?

pipe rack

Answer: W=(fXnXs)+A+B. Where, f : Safety factor =1.5 if pipes are counted from PFD. =1.2 if pipes are counted from P&ID. n : number of lines in the densest area up to size 450NB =300mm (estimated average spacing) =225mm (if lines are smaller than 250 NB) A : Additional width for =Lines larger than 450NB =For instrument cable tray/duct. =For electrical ... Read More »

What is the Difference between Pipe &Tube?

oilandgasclub pipe and tube

Pipe a. Specified by NB b. Thickness mentioned by Sch c. No size limitation Tube a. Specified by OD b. Thickness mentioned by BWG (Birmingham wire gauge) c. Size limitation exists Top Courses in Engineering Design PDMS Training 3+ Live Projects 700+ Interview Questions 24/7 E-learning Access SP3D Training Certified Trainer 700+ Interview Questions Job Assistance PDS Training 40+ Mock test ... Read More »

Process Piping Interview Questions

process piping

These are the important thing in piping 1) What is the minimum distance to be maintained between two welds in a pipe? The thumb rule is that the minimum distance between adjacent butt weld is 1 D . if not, it is never closer than  1 – 1/2 “ . this is supposedly to prevent the overlap of HAZs. minimum spacing ... Read More »

Pipe Stress Analysis


1)  Some of the pipes are subjected to high pressure and high temperature also pipes carry of the flowing fluid 2) We nee to check and confirm the pipe is not going to fail with these loading. 3) This process of checking the stress developed in the piping due to various loading is called PIPE STRESS ANALYSIS/FLEXIBILITY ANALYSIS 4) In ... Read More »

Piping Design Engineers – Check Yourselves


For those independent designers that work on there own, or that preliminary work that goes out for bid, there is no substitution for perfect work. Incomplete work and errors, all cost extra. Here are some useful tips to reduce what a checker would find to almost nothing. As a first step, check all of the information in the title block for conformance with ... Read More »

Role of an Quality Control Inspector

Quality Control Inspector roles

Quality Control Inspector Roles Offshore structures To carry out the inspections at specified stages of construction as per the approved quality control plan. Carry out inspections using suitable and precise methods. To ensure that the construction confirm to the contractual documents, quality system instructions, fabrication /erection procedures, drawings, standards, codes and specifications prescribed for the project. To prepare inspection records ... Read More »

Valves (Valves are Used for Main Three Purposes Listed Below)


Valves are used for main three purposes listed below. For Isolation of flow. For Regulation of flow. For avoiding the reversal of the flow. The valves used for isolation cannot be used for regulation but other way round is possible. Various types of valves. 1) Gate valve 2) Ball valve 3) Plug valve 4) Butterfly valve 5) Globe valve 6) ... Read More »

A P&ID Should Include and Should not Include

p&id diagram

This figure depict a very small and simplified P&ID: P&ID shows all of piping including the physical sequence of branches, reducers, valves, equipment, instrumentation and control interlocks. The P&ID are used to operate the process system. A P&ID should include: Instrumentation and designations Mechanical equipment with names and numbers All valves and their identifications Process piping, sizes and identification Miscellaneous ... Read More »

Control Valve (Handled by Instrumentation Department)

oilandgasclub.com-piping -design-course-in-chennai

These valves are self operated type. They have actuators. Actuators operate on the signal received from an instrument. They are used for very fine throttling and to have desired process parameters (pressure, temperature, flow) of fluid. Control valves can be of the following types based on parameters to be controlled: 1) Pressure control valve – Receives signal from pressure indicator ... Read More »

Process Flow Diagram Symbols – Valves

Piping codes and standards

Gate valve is a device used to control the flow of liquids and gases. Check valve also known as one-way valve, is to prevent the line of medium back. Globe valve is a mechanism used to control or stop the flow of liquid or gas through a pipe. Ball valve is a valve with a spherical disc, the part of ... Read More »

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