gap is to allow for shrinkage of the joint thus minimizing residual
stresses after completion of welding. It is not the intention of this
requirement to have a gap after welding of the joint. In fact there
more than likely will be no gap between the socket and the tube end
after welding. If you need positive proof that the gap existed prior to
welding, I suggest you use mechanical devices such as a gap-o-let which
will show up on an X-ray or have your QC (or the customer's QC) verify
each joint is properly gapped prior to welding. This is one of the
crazy issues which show that the individual requiring the RT has no clue
what the initial gap is for or the properties of materials that may make
it "go away".
By the by, the EPRI NDE center has done considerable work to show that
the gap is one of those "good" ideas with no actual benefit. But that
is beside the point.
John
-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of ELAMARAN RAJAN
Sent: Sunday, August 21, 2011 9:55 PM
To: materials-welding@googlegroups.com
Subject: [MW:12291] SOCKET WELD RT
Dear friends
Can any one explain me about the socket weld gap checking with
radiography
Does its requires one shot on three shots(super impose method)
any code reference for this
maran
QC
TCM
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to
materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at
http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views
and meant for educational purposes only, Users must take their own
decisions w.r.t. applicable code/standard/contract documents.
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
Comments