This publication covers cryogenic reciprocating pumps and pump installations for hydrogen and liquefied natural gas (LNG) service.

The information contained in this publication only applies to new installations designed after the publication of this document and not to existing installations. However, the information contained in this publication may benefit existing installations or those in the project phase.

This publication does not cover:

• Cryogenic reciprocating pumps and installations for liquid oxygen, argon, and nitrogen, which are covered in CGA P-48, Reciprocating Cryogenic Pumps and Pump Installations for Oxygen, Argon, and Nitrogen;
• Centrifugal liquid oxygen pumps, which are covered in CGA G-4.7, Stationary, Electric-Motor-Driven, Centrifugal Liquid Oxygen Pumps; and
• Carbon dioxide pumps, which are covered in CGA G-6.3, Carbon Dioxide Cylinder Filling and Handling Procedures and EIGA Doc 83, Recommendations for Filling of Cylinders and Bundles with Carbon Dioxide.