CGA G-4.7 PDF

This publication is written as a reference when specifying stationary, electric-motor-driven, centrifugal liquid oxygen pump designs and installations, and is a guide for the operation and maintenance of this equipment. This publication is based on experience in manufacturing and operating these pumps and it is applicable to those pumps operating on liquids containing greater than 95% oxygen.

It is not intended to cover other types of pumps such as reciprocating or vehicle mounted. While many parts of this publication can be used as the basis for those other types of pumps, it is not written considering all the special features of those designs. In addition, it does not attempt to include design and installation criteria for all cryogenic pumps but focuses on those specifically related to oxygen safety.

Unless a specific risk assessment allows deviations, the user shall follow the requirements of this publication when specifying pumping equipment for oxygen-enriched liquid mediums with oxygen concentrations between 23.5 mol % and 95 mol %.

Some of the practices presented represent conservative compromise and not all situations are covered. The user is cautioned that this publication is not a design handbook and does not eliminate the need for competent engineering judgment and interpretation. It does not purport to address all the safety problems or hazards associated with liquid oxygen pump use. It is the responsibility of the user of this publication to consult with qualified technical personnel, to establish appropriate safety and health practices, and to determine the applicability of regulatory limitations.

The purpose of this publication is to furnish qualified technical personnel with technical information to use in designing new liquid oxygen pump installations. It provides considerations that will enhance safe and reliable operation of liquid oxygen pumps.

The information contained in this publication may also benefit existing installations or those in the project phase. However, some of the requirements and recommendations in this publication may not always be practical or applicable with regards to the design and configuration of existing liquid oxygen pump systems. Requirements and recommendations related to operations and maintenance should be considered.