materials selection for reciprocating compressor

[kissjxp]

I have a question on the cylinders materials selection for a reciprocating compressor. It has 90 mol% Hydrogen.

Design pressure: 4600KPa
Design temperature: 90C; MDMT: -7 deg C.

The client choose nodular iron. Is it OK? I am worried about the temperature. Nomarlly, what is the lowest temperature we can use for the nodular iron?

Thanks.

 

[metengr]

kissjxp;

I would suggest you visit the web site below regarding evaluation of properties for this application;

http://www.ductile.org/didata/Section7/7intro.htm#Hardenability