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CGA P 25 : 2007

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

GUIDE FOR FLAT-BOTTOMED LOX/LIN/LAR STORAGE TANK SYSTEMS
Superseded date

18-10-2013

Published date

12-01-2013

1 Introduction
2 Scope
3 Definitions
   3.1 Cryogenic liquid
   3.2 Oxygen-enriched atmosphere
   3.3 Oxygen-deficient atmosphere
   3.4 Qualified technical personnel
4 Hazards
   4.1 Enhanced flammability
   4.2 Asphyxiation
   4.3 Low temperature
5 General storage tank system design considerations
   5.1 Inner tank
   5.2 Outer tank
   5.3 Piping and nozzles
   5.4 Foundations
   5.5 Annular space purge/pressurizing gas
   5.6 Tank grounding
   5.7 Additional considerations for oxygen service
6 Overpressure and vacuum protection
   6.1 Protected hazard
   6.2 Inner tank pressure control
   6.3 Inner tank pressure indication and monitoring
   6.4 Inner tank overpressure protection
   6.5 Inner tank vacuum protection
   6.6 Outer tank overpressure protection
   6.7 Outer tank vacuum protection
   6.8 Installation and sizing criteria
   6.9 Inspection and testing methods
7 Overfill protection
   7.1 Liquid level measurement devices
   7.2 Other system designs
8 Liquid nozzle(s) and inlet and outlet piping
   protection
   8.1 Protected hazard
   8.2 Protective systems
   8.3 Liquid nozzle mechanical integrity
9 Storage system vents
   9.1 Flat-bottomed tank vents
   9.2 Venting from LOX/LIN/LAR storage systems
   9.3 Pressure relief devices
   9.4 Automatic vent valves
   9.5 Vent pipes
   9.6 Dry gas purge
10 Site selection and separation distances
   10.1 Location
   10.2 Containment
   10.3 Vapor barriers
   10.4 Codes and standards
11 Operator training and emergency response
   11.1 Training of personnel
   11.2 Emergency procedures
12 Tank construction and commissioning
13 Management of change in tank service
14 References
Table
Appendices
Appendix A - Diagram for typical flat-bottomed storage
             tank system (Informative)
Appendix B - Definition of terms for a typical flat-bottomed
             cryogenic storage tank system (Informative)

Provides general information for designers, owners, operators or fabricators involved with LOX, LIN, LAR flat-bottomed cryogenic storage tank systems.

DocumentType
Standard
PublisherName
Compressed Gas Association
Status
Superseded
SupersededBy

SAE AIR 1059 : 2017 OXYGEN CYLINDER QUALITY, SERVICEABILITY, MAINTENANCE TRANSFILLING AND MARKING
NFPA 99C : 2005 GAS AND VACUUM SYSTEMS
CGA P 31 : 2012 LIQUID OXYGEN, NITROGEN, AND ARGON CRYOGENIC TANKER LOADING SYSTEMS
ASTM G 88 : 2013 : REDLINE Standard Guide for Designing Systems for Oxygen Service
CGA SB 31 : 2013 HAZARDS OF OXYGEN IN THE HEALTH CARE ENVIRONMENT
CGA P 8 : 2013 SAFE PRACTICES GUIDE FOR CRYOGENIC AIR SEPARATION PLANTS

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