As the fabricator of a vessel(Drum).We finished it and the data report is signed by our AI...now comes the engineer wanting to add an attachment clip. Its still in our shop. Is this a routine repair that requires an R stamp? Secondly, Is it reasonable to wave the re-hydro after welding on the...
A vendor declined to bid on 2-1/4 Cr vessel because they say they've had too many cracking issues in the past. Does anyone have experience with this material 1" to 3" thick? Issues such as weldability, cracking, HIC, delayed HIC, Pre-heat sensitivity, PWHT issues etc... If so what...
The vendor is fabricating P11 and P22 piping. Spools are placed in an oven for PWHT so the whole part. Afterwards they installed weld-in type thermowells so a second local PWHT was done. Now I find the welds on the thermowells in this B-31.3 piping were installed as a fillet welds and not full...
Other threads have approached the subject and in my case a client used 309 filler metal to weld about 25 different 316ss Thermowells in crude and reformer sections of their refinery. Some lines are CS and others are 1-1/4cr and 2-1/4cr. They have lots of cracking issues after startup and first...
Where can I find the requirements for hardness testing of vessels after PWHT and/or the maximum hardness values of various metals typical to pressure vessel fabrication (P4, P5 etc..)
My vendor wants to claim an exemption to PWHT of some attachment clips to A335 P9 (P5C piping). (8-10% Cr) He is saying B31.3, Para 331.1.3 tells you what thicknesses to use with Table 331.1.1 with the end of that Para ending with “…except as follows:” where Para (b) states “…for attachment of...
