Hydrogen service lines 9

[Mche]

Hi,
Are there any specific design criteria to size Hydrogen service pipe lines such as velocity, Pressure Drops etc.?
We attempted to optimize line sizes using indutry norms, but were questioned for basis.

Don't have any specifc references to answer back. One thought of is API RP 14E. However I am not sure if there exists any for Hydrogen service hence specifically looking for it.
Please suggest, if any one knows.
Thanks

 

[jamieclark]

As a former GE engineer responsible for the design of their H2 cooling system auxiliaries, for H2 cooled generators, one of the most important safety features is in the compatibility of the system devices, valves, instruments, gaskets and all other wetted parts. davefitz's reference is close, but the spec isn't intended to be based around a vendor or valve type (ball vs. globe, etc.). Rather it's regarding the "flameproof" requirement on all H2 system valves. "Flameproof", in the valve world, means that the valve will have a secondary mechanical and metallic seat that will help prevent the emission of H2 in the event of an "ambient" fire. This prevents the H2 from 'feeding the flame' so to speak. Many of the GE specs were actually functional specs submitted to sub-vendors. It then became the vendor's responsibility to implement the proper industry standards for these systems.