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CGA C-28-2019
Guideline for Heat Exposure Indicating Systems on Aluminum Alloy Cylinders - 1st edition (Formerly SB-22)
This publication applies to high pressure, seamless refillable aluminum alloy cylinders. While not addressed in this publication, a heat indicating system can also be used on refillable low pressure, aluminum alloy cylinders.
Compressed Gas Association, Inc. [cga]