Acceptance Criteria for Excess Penetration
Acceptance Criteria for Excess Penetration
(OP)
Hi friends
Well in Pipeline Radiography of a butt joint what is the acceptance criteria for Excess Penetration.
Kindly note that , we are not able to check weld joint from Inside and code we are following is API 1104.
Well in Pipeline Radiography of a butt joint what is the acceptance criteria for Excess Penetration.
Kindly note that , we are not able to check weld joint from Inside and code we are following is API 1104.





RE: Acceptance Criteria for Excess Penetration
RE: Acceptance Criteria for Excess Penetration
Thanks for your comment but BT ( Burn Through ) come due to excess penetration but its not classified as excess penetration.
What API 1104 says - A burn-through (BT) is defined as a portion of the root bead where excessive penetration has caused the weld
puddle to be blown into the pipe.
RE: Acceptance Criteria for Excess Penetration
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Acceptance Criteria for Excess Penetration
You are right that if code is silent then no need to ask , but excess penetration is a defect , and the same code is giving range for Re-inforcement ( outer ).
yes Density difference is a concern based on that we can take a decesion. But is there any thing specific ?
Thanks for your sugetion.
RE: Acceptance Criteria for Excess Penetration
If you are looking for an acceptance criteria, 1104 will not be any help because the only criteria for reinformement is for the outside surface.
RE: Acceptance Criteria for Excess Penetration
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Acceptance Criteria for Excess Penetration
Well i have to look for pigging requirements
thanks , thanks to all
RE: Acceptance Criteria for Excess Penetration
I got the requirement for excess penetration from Shell DEP - DEP 61-40-20-30 1993 amendments to API 1104
6.3.6 Burn through
Change title to:
6.3.6 Burn through and excessive penetration
Add the following:
6.3.6.4 Root penetration shall not exceed 3 mm.
RE: Acceptance Criteria for Excess Penetration
"The maximum depth of root pass penetration shall be 1.6 mm."
RE: Acceptance Criteria for Excess Penetration
Thanks Eyec
RE: Acceptance Criteria for Excess Penetration