cold weld repair on P91 material?
cold weld repair on P91 material?
(OP)
Is cold weld repair on P91 acceptable? If its so, please give some ASME reference?
Performing weld repair on P91 in As welded condition (without performing PWHT). If its done what worst things may happen?
If you have some intersting papers/literatures pls share it.....
Performing weld repair on P91 in As welded condition (without performing PWHT). If its done what worst things may happen?
If you have some intersting papers/literatures pls share it.....





RE: cold weld repair on P91 material?
The folks in the UK have done significant work on cold weld repair of Grade 91. In most of their data, it would appear the creep life of cold weld repaired tube material approaches that of the fine grained heat affected zone in PWHT Grade 91 material. So, basically the remaining creep life of cold weld repaired Grade 91 material approaches that of the fine grained heat affected zone in PWHT material.
More work is being done by EPRI for heavier wall Grade 91 material using various weld joint configurations and filler metals to achieve an "engineered weld repair".
RE: cold weld repair on P91 material?
Temperbead Repair of T91 Using EPRI P87 Filler Metal
Author: John A. Siefert and John P. Shingledecker, Electric Power Research Institute
"Whom the gods would destroy, they first make mad "
RE: cold weld repair on P91 material?
http://www.epri.com/abstracts/Pages/ProductAbstrac...
RE: cold weld repair on P91 material?
I just wish people like EPRI would cease and desist from referring to any form of arc welding as "cold welding". This goes for you too, Fronius.
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"
RE: cold weld repair on P91 material?
What happens to your equipment and people if this repair fails catastrophically? That is your answer.
There is a lot of R&D going on in this area, but what I have seen takes very detailed welding engineering and careful qualification (exact materials and configurations). This is not a forgiving situation.
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
RE: cold weld repair on P91 material?
I didn't know that about the NBIC metengr , I'm going to have to check that out.
RE: cold weld repair on P91 material?