"J" weld of P91 pipe with SS316 backing

By Swapan Date 07-28-2005 03:25

With regards to the above mentioned subject I have following queries.

1) Whether PWHT has to done after completion of the weld?

2) What electrode and filler metal to be used for the welding process?

3) Whether butterring is required to have a sound weld joint ?

I will be very thankful to receive a early response from forum.

By Jim Hughes (***)

Date 07-28-2005 16:14

Where are you doing the work? What part of the world? What code are you welding to?

By Swapan Date 07-29-2005 10:46

Dear Mr Hughes

The replies are as follows.

1) The job relates to welding of P91 pipes for steam flow service with SS 316 backing .
2) We are located in western part of India .
3) Followed Code is ASME section IX

Expecting a reply on the same.

By Jim Hughes (***)

Date 07-29-2005 17:02

I'm still not clear.
1. You want ot use 316 s.s for backing material on a P91 weld? Why?
2. What are you builing in western India?
3. Are you testing welders? (ASME Sec. IX is for testing welders)

You need to give more detail.