Is post weld heat treat required wh

[Jeff Ding]

Is post weld heat treat required when welding schedule 80 carbon steel pipe?

 

[MJCronin]

There are many responses on "eng-tips" to PWHT requirements for piping..

https://www.eng-tips.com/viewthread.cfm?qid=365438

https://www.eng-tips.com/viewthread.cfm?qid=389287

https://www.eng-tips.com/viewthread.cfm?qid=381691

The need for Piping PWHT is determined by your selected "Code of Record", materials selected, wall thickness etc. etc.

(you have selected a piping code that you are building to... right ?)

MJCronin
Sr. Process Engineer

 

[SWComposites]

Depends what the pipe is used for.

 

[0707]

if your service is reach amine, sour water or caustic, maybe it will be required PWHT.

luis

 

[Dhurjati Sen]

PWHT would do no harm, if done as per B 31.3 or any other code. However, could be unnecessary hence wasteful.

DHURJATI SEN