USE OF AISI4140 UNDER ASME VIII
USE OF AISI4140 UNDER ASME VIII
(OP)
Is AISI4140 or AISI4340 acceptable for use and a pressure containing part (such as flange or cap) under ASME VIII or is it restricted to bolting (per it's equivalent ASTM A193 B7)?
I am looking at a filter vessel that was assembled using API standard oilwell type componentents machined from AISI4140. Where it is being used it should ideally be treated as a vessel and the design should be checked accordingly.
Any assistance is appreciated.
Regards
CSGWB
I am looking at a filter vessel that was assembled using API standard oilwell type componentents machined from AISI4140. Where it is being used it should ideally be treated as a vessel and the design should be checked accordingly.
Any assistance is appreciated.
Regards
CSGWB





RE: USE OF AISI4140 UNDER ASME VIII
If the material is not listed in the table then it is not a premitted material for construction to the code.
RE: USE OF AISI4140 UNDER ASME VIII
See UCS-5(c) and table UCS-23
RE: USE OF AISI4140 UNDER ASME VIII
That was my undrestanding also.
No - welding was not occuring on the item. All joints are threaded (buttress) which I believe leads to other issues anyway particularly on a 10" shell.
Regards
CSGWB