Tear of Head weld
Tear of Head weld
(OP)
Dear experts,
The issue is about tearing along long seam weld of SS (304L) head.this head is formed from 3 segments.along with forming action the L.W's were torn to a length of about 20 mm exactly at the place of weld seam.Fortunately the base metal is sound. What I want to know is the needed test after repair of weld such as ferrite checking and hardness(criteria) and NDT ? could you please help me?
The issue is about tearing along long seam weld of SS (304L) head.this head is formed from 3 segments.along with forming action the L.W's were torn to a length of about 20 mm exactly at the place of weld seam.Fortunately the base metal is sound. What I want to know is the needed test after repair of weld such as ferrite checking and hardness(criteria) and NDT ? could you please help me?





RE: Tear of Head weld
Is this PV head in operation, or ebing built?
Why do you think you can save the PV head by re-welding at a previously and badly distorted head seam at the failed weld, instead of replacing the head? Or cutting out the failed area completely, and using new material?
RE: Tear of Head weld
Once all of the ruptured weld metal has been removed, and verify as being removed using LPT, you will need to re-solution anneal the head material to remove the affects of cold working. Once this is completed re-weld the long seams. Perform final LPT on the welds.
RE: Tear of Head weld
MJCronin
Sr. Process Engineer
RE: Tear of Head weld
RE: Tear of Head weld
RE: Tear of Head weld
If the rupture happens due to poor quality of weld such as brittleness or hot cracking of weld isn't it enough to just reweld and do NDE?
RE: Tear of Head weld
The re-solution anneal would only be necessary if a significant amount of cold work had been introduced during forming to rupture an acceptable quality long seam weld.
If the weld was defective as you believe and is possible, removal of the entire weld could be done with no re-solution anneal to the base material. You will need to proceed with caution on re-use and you need to make this call because this is a nonconformance.
RE: Tear of Head weld
RE: Tear of Head weld