pwht of dissimliar weld
pwht of dissimliar weld
(OP)
welding 304l to carbon steel, over 3/4 inch at the joint.Is it a requirement of b31.3 to pwht?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
pwht of dissimliar weld
|
pwht of dissimliar weldpwht of dissimliar weld(OP)
welding 304l to carbon steel, over 3/4 inch at the joint.Is it a requirement of b31.3 to pwht?
Red Flag SubmittedThank you for helping keep Eng-Tips Forums free from inappropriate posts. Reply To This ThreadPosting in the Eng-Tips forums is a member-only feature.Click Here to join Eng-Tips and talk with other members! |
ResourcesWhat is rapid injection molding? For engineers working with tight product design timelines, rapid injection molding can be a critical tool for prototyping and testing functional models. Download Now
The world has changed considerably since the 1980s, when CAD first started displacing drafting tables. Download Now
Prototyping has always been a critical part of product development. Download Now
As the cloud is increasingly adopted for product development, questions remain as to just how cloud software tools compare to on-premise solutions. Download Now
|
RE: pwht of dissimliar weld
RE: pwht of dissimliar weld
RE: pwht of dissimliar weld
RE: pwht of dissimliar weld
As a safety measure, you may wish to PWHT if the weld is sufficiently thick (> 2"). You will of course make the weld using E/ER309 weld filler metal.
RE: pwht of dissimliar weld
RE: pwht of dissimliar weld
The P No 1 material will not be used in service and over 35 years experience in engineering B31.3 piping systems as Owner, Owner's Engineer, and Contractor. We have done this countless times.
Why would you believe that a temporary cap used for hydrotest and removed there after would be subject to B31.3 PWHT requirements?
RE: pwht of dissimliar weld
RE: pwht of dissimliar weld
especially since you should have an inch or two excess of stainless steel past the final cut and bevel point, that is this temporary weld is not at the same point of your final weld.
at least that's the way we always do temp hydrotest welds.
RE: pwht of dissimliar weld
RE: pwht of dissimliar weld
Because temporary welds may be poorly made (low concern by the welder) and you are performing a high pressure pneumatic test with probably mega ft-lbs of stored energy, I would require the temporary weld to be examined using RT or UT methods to ensure weld integrity.
RE: pwht of dissimliar weld
RE: pwht of dissimliar weld
RE: pwht of dissimliar weld