SA240 TP304L? for Cryogenic Vessel (-128¦C)
SA240 TP304L? for Cryogenic Vessel (-128¦C)
(OP)
According to a senior design eng of our firm, the correct material for this vessel (design temp= 100/-128 °C) is SA240 TP304L.
According to ASME Secc 2D (Metallurgical Phenomena), the only materials which do not show a decrease in the tensile yield nor ductility measured as percent elongation are those listed in tables 1B and 2B from section 2B (non-ferrous materials).
So I conclude that this material (SA240 TP304L) could be used only if impact testing is provided.
I'd like to know what you think about this.
Thanks,
Diego.
According to ASME Secc 2D (Metallurgical Phenomena), the only materials which do not show a decrease in the tensile yield nor ductility measured as percent elongation are those listed in tables 1B and 2B from section 2B (non-ferrous materials).
So I conclude that this material (SA240 TP304L) could be used only if impact testing is provided.
I'd like to know what you think about this.
Thanks,
Diego.





RE: SA240 TP304L? for Cryogenic Vessel (-128¦C)
RE: SA240 TP304L? for Cryogenic Vessel (-128¦C)
Regards
rhg
RE: SA240 TP304L? for Cryogenic Vessel (-128¦C)
If the MDMT is -186 deg C or warmer impact testing of this material including HAZ's is exempt (see UHA-51 (d)).
RE: SA240 TP304L? for Cryogenic Vessel (-128¦C)
Thanks.
RE: SA240 TP304L? for Cryogenic Vessel (-128¦C)
Yes, it can but it requires CVN impact testing for MDMT at or warmer than -196 deg C (see UHT-6(a)). For colder metal temperatures, in addition to CVN tests, drop weight testing shall be performed (see UHT-6 (b)).
RE: SA240 TP304L? for Cryogenic Vessel (-128¦C)
Thanks,
Diego.