Flange system for low temperature gas stream
Flange system for low temperature gas stream
(OP)
I am involved in a project to design pressure equipment handling either Nitrogen, Hydrogen, Oxygen or a mixture of these - all at very low temperatures. These will all be in gaseous form within the equipment and in the connecting piping. The design temperature of the equipment and piping is -257C/-430F. Design Pressure is 20 barg. The equipment will be made from Stainless Steel.
Regarding the connections to the equipment: Can anyone please suggest an appropriate "flange system" for these conditions. Is there a standard I can refer to? Whats the minimum allowable temp for ASME B15.5 flanges?
Any help pointing me in the right direction would be appreciated
Regarding the connections to the equipment: Can anyone please suggest an appropriate "flange system" for these conditions. Is there a standard I can refer to? Whats the minimum allowable temp for ASME B15.5 flanges?
Any help pointing me in the right direction would be appreciated





RE: Flange system for low temperature gas stream
RE: Flange system for low temperature gas stream
In a nutshell, 300 series stainless steel flanges are good to any low temperature, though I'd suggest checking the code first.
RE: Flange system for low temperature gas stream
But can you provide any advice on the type of sealing face and gasket that can be employed. Is there a flange standard appropriate to these conditions. (Incidentally, 300Lb R/F has been specified but I am hesitant to use a standard raised face flange - I have insufficient evidence to support my feelings other than "it just doesnt seem right").
RE: Flange system for low temperature gas stream
RE: Flange system for low temperature gas stream
RE: Flange system for low temperature gas stream
RE: Flange system for low temperature gas stream
Thanks for sharing the benefit of your experience.
Could you please let me know the minumum temperatures at which you have experience of the 304/Teflon Flexitallic gaskets, the pure Teflon gaskets and Garlock gaskets.
Did you go as low as -257C?
Thanks in advance.