NDT and PWHT - ASME I / B31.1 6

[FernandoL]

Due to my little knowledge and also based on the need to use ASME I and ASME B 31.1 for the construction of a boiler and its power piping, in which items of these codes are defined the correct time to apply the non-destructive tests. In other words, before or after post weld heat treatment?

 

[david339933]

It is not hard to satisfy the conditions of 131.6. Preheat maintenance is an essential variable for most processes. I have seen countless P5A welds done to B31.1 with none having preheat maintenance. Near impossible with any commute to a Heat Treat Facility.
All were RT after PWHT per 136.4.1

 

[0707]

Fernandol

As beeing a prof. I invite you to learn to teach, otherwise you attendants will give up ear you.

regards

luis

 

[r6155]

Fernando
The time has come for you to ask the question, WHY are NDE made after PWHT?
I am sure that some student will ask you.

Regards

 

[DekDee]

David,
Agree 100% with your comments.
My mistake was quoting from an old edition of B31.1.
After hunting down a later edition (still not the latest) it is evident the answers to the OPs question are in 136.4.1 as you noted.
Cheers,
Shane

 

[0707]

ai ai FERNANDOL! FERNANDOL!