we are about making PWHT for a c.s vessel of 133 mm thickness by internal burner technique.
of course saddles will not reach temperature for PWHT process,the question is where can i find the exemption from PWHT for non-pressure parts like saddles in ASME VIII DIV.1
we are about to fabricate a a claded carbon steel tower
when welding edges of integrally claded plate joints the clade will be removed and carbon steel welded then reclad the joint ,we would like to radiograph the joint before cladding (i.e carbon steel only) as ASME VIII DIV.1 permits that but...
when a vessel is to be radiographed (full) according to design drawings and ASME VIII DIV.1,the vessel is 30 mm
wall thickness,should i include nozzle to shell in radiography,and if it is impractical should i use UT in lieu?
finally can any body tell me or give me a simplified
brief in a...
why does not api 650 define heating and cooling rates for PWHT,should i use ASME VIII DIV.1 UCS 56 to define it
also it requires PWHT for clean out door and nozzle openings what about shell?
and it states that nozzle of a a certain dia. in a certain shell thickness is to be prefabricated and...
if vessel requires a full PWHT according to construction drwings,should i incorporate in this process blid flanges even though they have no welds just bolted,and have large thickness which may make heating & cooling rates slow(as heating and cooling rates depends on max. metal thickness
namely...
if a P No.1 vessel is heat treated as a client requirement
(thikness 16 mm)
after that it was needed to fix a plate on the shell from OUTSIDE the, plate will be welded by fillet weld
will this impact the forgoing stress relieving process
and if we should re-PWHT,should this be applicable to wole...
hi,can anyone tell me:
if a heat treated joint is found to be faulty aftr radiography,after removing the discontinuity by grinding
and refilling by welding(only the faulty thickness) should i need to re-PWHT the whole joint even if the repaired thickness is less than 38 mm for P no1 material...
