Cryogenic Piping Materials

Piping calculations manual - Google Books Result

I Googled your title and got this +more.

<...what kind of materials are required for cryogenic piping?...>

Those that are corrosion-compatible with the fluid in the piping, not stated in the original posting, its temperature and its pressure. Those weren't stated either.....

I have used 1/2" copper tube with soldered joints to carry liquid nitrogen with no difficulties.

• The attached link is very good reference to the Construction Steel for Noncorrosive Services, which includes the recommended materials for plates, pipes, forgings and pressure bolts for cryogenic services: Steel_for_Noncorrosive_Service.

• The type of information required for verifying the mill test reports & certificates (criteria of acceptance) are clearly indicated in the codes in which you put and specified your material requisition, like as ASME or ASTM. See the following link for pipe material of ASME SA-106: ASME_SA-106.

• In all ASME codes and standards, the definition of design pressure is the MAWP, where in ASME B31.8 (Gas Pipelines) the definition of m.o.p. = max. operating pressure and not necessarily the max. allowable operating pressure, and nearly the m.o.p equal to the design pressure d.p. For more details see Table 841.322(f)-Edition 1999, Test Requirements for Pipelines and Mains to be Operated at Hoop Stresses of 30% or more of the SMYS of the pipe.

• With respect to hydrostatic test pressure, you have to specify which code you have used for design, fabrication and erection of your piping system: is it ASME B31.1, B31.3, B31.4, B31.5 or B31.8?

• See the following CR4 Threads: (Hydrostatic Test Requirements), (MAWP VS Hydrostatic Test), (Pressure Testing) & (Hydrostatic Tests )

The file Construction Steels for Noncorrosive Service is a "Table 11.1. Construction Steels for Noncorrosive Service", which is extracted from Pressure Vessel Design Handbook, 2^nd edition by Henry H. Bednar.

Also, the same table is located at Pressure Vessel Design Manual, 3^rd edition by Dennis Moss, "Appendix H - Material Selection Guide", with a subscript showing the extraction of the table from Pressure Vessel Design Handbook by Henry H. Bednar.

Try to get a copy of :

1.- "Pressure Vessel Design Manual". Appendix H "Material Selection Guide".

2.- "Material Selection for Refineries & Associated Facilities" by White & Ehmke. NACE. in appendix A "Guidelines for Material Selection for Low-Temperature Services".

If it is Liquid Helium stainless steel but you will probably be doing repair work. You need to specify the liquid/temperature there is Liquid Nitrogen Liquid Oxygen or LOX very dangerous.