Pig Launcher & receiver Design Code for 4" Pipeline 1

[MIANCH]

Hi,
Can anyone from your experience guide me for 4" dia (22 km long) pipeline for hydrocarbon condensate whether pig launcher & receiver is mandatory or not. API 31.3 and other codes explain only components requirement but no specific guidelines for minimum pipe size.
Please explain.

 

[LittleInch]

B31 3 is a piping code.

You need a pipeline code like b31.4 (liquid) or b31.8 (gas) or other pipeline code depending on where you are.

A pig trap is not mandatory in any code I know of but is usually a very good idea.

At the least make the pipeline piggable by using min 3D bends, barred tees, that sort of thing and then end with a flange to which you can attach a pig trap if you need to for commissioning or inspection.

You often see this on flowlines when you don't need permanent pig traps.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[pierreick]

Hi,
Consider this brochure where codes are stipulated .
Note : you may want to contact them.
Good luck.
Pierre

 

[MIANCH]

Then pig launcher and receivers are selected based on pig requirement. if service is clean then no need to include pig in pipeline.

 

[LittleInch]

Correct. If you only need to pig during testing and commissioning and then inspection once every 5-10 years, I wouldn't add a permanent trap, but I would make it piggable and leave an end flange so you can add one later on.

The smallest pig trap I ever saw was a 3" one and it looked really dinky...

You could also consider a pigging valve? Look them up but I've seen these used on flowlines before.

But if this is clean, water free condensate then I would agree - don't bother.



Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[MIANCH]

LittleInch, Many thanks, I appreciate you much for your time & experienced advice.
Best regards