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CGA C-30-2022
Guideline for Management of Embrittlement During Evacuation of Annular Space of DOT-4L and TC-4LM Liquid Cylinders (Formerly TB-30)
This publication is intended for cylinder manufacturers and repair facilities performing vacuum maintenance on DOT-4L and TC-4LM liquid cylinders while heating the inner vessel.
Compressed Gas Association, Inc. [cga]