CrMo vessel external attachment with full penetration
CrMo vessel external attachment with full penetration
(OP)
API 934A/C/E require that all welded joints including non-pressure to the vessel body should have full penetration joint design. I have seen many horizontal vessels/heat exchangers having saddles designed with wear plate, which is fillet welded to the vessel shell. Is this acceptable, or a good practice?
Thank you.
Thank you.





RE: CrMo vessel external attachment with full penetration
RE: CrMo vessel external attachment with full penetration
Horizontal vessels with wear pads are commonly designed to ASME VIII, where fillet welds are permitted
API Recommended Practice 934 series was developed specifically for heavy wall fabrications of low Chrome Molly materials.
The 934 series are quite recent
-MJC
RE: CrMo vessel external attachment with full penetration
Regards,
Mike
RE: CrMo vessel external attachment with full penetration
Cheers,
gr2vessels
RE: CrMo vessel external attachment with full penetration
The pad is not really a wear plate (in the sense of a shell sitting on concrete supports) if it is welded to the shell.
The answer, as always, it depends....
Regards
Mike
RE: CrMo vessel external attachment with full penetration
In general. API doesn't address true pressurevessels well, and ASME has been addressing pressurevessels since before 1920.