Publication

P-40: Calculation Method for the Analysis and Prevention of Overpressure During Refilling of Cryogenic Tanks with Rupture Disk(s)

Abstract

This publication provides technical guidance and the complete equation set needed to assess the overpressure protection system for a particular vessel during the refill operation, given a particular set of transfer and delivery equipment. Acceptable engineering controls for the protection of cryogenic storage tanks and transport tanks with rupture disk(s) as part of the relief system are provided. The application of these engineering controls constitutes a minimum standard.

The calculations in this publication may be used to evaluate each pumping system and cryogenic tank combination in use with oxygen, nitrogen, or argon. It applies to tanks filled either by pump from a cryogenic transport or by a ground-mounted pump. This applies to cryogenic tanks including trailers, bulk tanks, microbulk tanks, and portable tanks. This does not apply to cryogenic tanks with flat bottoms. For flat bottomed cryogenic tanks, refer to CGA P-8.9, Bulk Liquid Oxygen, Nitrogen, and Argon Storage Systems at Production Sites. While this publication addresses systems in oxygen, nitrogen, or argon service, the principles outlined herein may be extended to other cryogenic or refrigerated fluids with due consideration given to:
• thermophysical properties of the fluid;
• specific pumping system for the fluid;
• piping configurations affecting hydraulic calculations that are not specifically addressed in this publication (e.g., vent stacks); and
• hazardous nature and consequences of fluid release to atmosphere.

Access Publication

Member Price:
$87
Subscriber Price:
$87
Non-Member Price:
$159

Member E-Pub Price:
$0
Subscriber E-Pub Price:
$0
Non-Member E-Pub Price:
$159
Buy Hard Copy
Purchase E-Pub
View Table of Contents (free)

Properties

Edition:
5
Published:
May 2025
Status:
Available To the Public
Size:
46 pages
Publisher:
CGA
Special Attributes:
Harmonized
Notes:
Committee:
Bulk Distribution Equipment and Standards