What is the required hydro test pressure for vessels going to China?
What is the required hydro test pressure for vessels going to China?
(OP)
Can anyone tell me if a Sec VIII Div 1 pressure vessel going to China is required to be hydro tested at 1.5 x MAWP or is it just the standard 1.3 x MAWP? And where is it written?
Thanks,
Thanks,





RE: What is the required hydro test pressure for vessels going to China?
RE: What is the required hydro test pressure for vessels going to China?
Regards,
Mike
RE: What is the required hydro test pressure for vessels going to China?
RE: What is the required hydro test pressure for vessels going to China?
HOWEVER, you have to watch out for local yielding if you use the post-1999 ASME allowable stress values -- 3.5 safety factor and 1.3 hydro, or
pre-1999 ASME values -- 4.0 safety factor and 1.5 hydro.
Mixing & matching Codes requires a lot of extra dilignece and some extra calc's.
RE: What is the required hydro test pressure for vessels going to China?
However, if your vessel is design based on ASME VIII Div 1 with U stamp, I believe that the Chinese "Boiler Pressure Vessel inspection and supervision House" may also accepte it. In this case, You can do everything per UG-99.
RE: What is the required hydro test pressure for vessels going to China?
There are a few requirements that we need to bring into play from GB-150, such as chemical requirements for materials and impact testing requirements, but otherwise we are required to meet ASME Code for the mechanical design & fabrication requirements, therefore UG-99 is applicable.