Standards for Copper piping systems for Cryogenic Services

[jor1492]

Hello all,

I want your advices to know what are the american standards for copper tubes, fittings and joint in piping systems for Cryogenic services with small diameters (1/2-8 inch)?

thanks in advance

 

[bimr]

"Most of the early work in the cryogenic industry was accomplished through the use of copper process vessels, piping, and tubing. Aluminum has extensively replaced copper and cuprous alloys in the fabrication or air separation plants. However, copper and cuprous piping are still extensively used in piping and tubing runs from cryogenic tankage for several reasons which include ease of fabrication (e.g., brazing, soldering), resistance to ignition, and combustion resistance in oxygen-enriched systems. It may be noted that orbital arc-welded stainless piping systems are increasingly replacing cuprous piping for the delivery of particulate and contaminant-free electronic grade gases."

Piping Handbook, Nayyar

ASME Pressure Piping Code, Section B31.3, Process Piping Code.

Copper (C10200, C12200), 90/10 Cu-Ni CS 706, 70/30 Cu-Ni CDA 715

http://copperalliance.org.uk/docs/librariesprovider5/resources/tn-31-cu-ni-90-10-and-70-30-pdf.pdf

http://www.atlasbronze.com/C10200_copper_tubing_s/1850.htm