ASME B31.3-PWHT on the same joint twice
ASME B31.3-PWHT on the same joint twice
(OP)
Dear Friends
Process Piping - Carbon Steel Piping - 6" Sch XXS ( 21.9mm )- PWHT done on the same butt joint twice. RT done after 1st PWHT-It passed.Is it acceptable to ASME B31.3?
What harm done to the joint ( weld metal & HAZ ) undergone PWHT twice, in terms of Mechanical Properties.... etc.
Thanks
Process Piping - Carbon Steel Piping - 6" Sch XXS ( 21.9mm )- PWHT done on the same butt joint twice. RT done after 1st PWHT-It passed.Is it acceptable to ASME B31.3?
What harm done to the joint ( weld metal & HAZ ) undergone PWHT twice, in terms of Mechanical Properties.... etc.
Thanks





RE: ASME B31.3-PWHT on the same joint twice
If your material is A106 no harm done.
Please comeback with the piping specification for a more definitive answer..
RE: ASME B31.3-PWHT on the same joint twice
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: ASME B31.3-PWHT on the same joint twice
RE: ASME B31.3-PWHT on the same joint twice
RE: ASME B31.3-PWHT on the same joint twice
RE: ASME B31.3-PWHT on the same joint twice
MATERIAL - ASTM A106 / ASTM A53 x 6" x 21.95mm.
Pls explain "QW-407.8(b)a change of more than 10% in the no of PWHT heat cycle following the welding cyscle"
Thanks
RE: ASME B31.3-PWHT on the same joint twice
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: ASME B31.3-PWHT on the same joint twice
I don't get your points. Pls explain Thanks
RE: ASME B31.3-PWHT on the same joint twice
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: ASME B31.3-PWHT on the same joint twice
Material - ASTM A106/A3
I've been going through ASME B31.3 Chapter VI- Try to confirm extent of MPI if any required beside RT/UT for Process Piping Butt Welds.
If MPI required, please advise respective section(s).
I've concluded RT as per ABS Rules.ABS Rules do not require MPI.
Thanks in advance.
RE: ASME B31.3-PWHT on the same joint twice
For MPI, refer to 341.4.3(b) and 302.3.3 (for castings).