CGA G1.9:2019

This publication provides guidelines for maintaining the proper solvent level in acetylene cylinders. It should be of interest to acetylene manufacturers, acetylene production and distribution personnel, authorized acetylene cylinder reinspection facilities, welding gas distributors, safety personnel, and users of acetylene.
This publication covers recommendations for maintaining the proper solvent level in acetylene cylinders. While the background, precautions, and general procedures given apply to all solvents in use with acetylene, special emphasis is given to the use of acetone and dimethylformamide (DMF).
Included are residual gas tables based upon the best available data that reflects current industry practice. The expected accuracy of these values is approximately ± 10% and should be used as a guide only.