Section 75.1106-5 - Maintenance and tests of liquefied and nonliquefied compressed gas cylinders; accessories and equipment; requirements(a) Hose lines, gages, and other cylinder accessories shall be maintained in a safe operating condition.(b) Defective cylinders, cylinder accessories, torches, and other welding, cutting, and burning equipment shall be labeled "defective" and taken out of service.(c) Each qualified person assigned to perform welding, cutting, or burning with liquefied and nonliquefied compressed gas shall be equipped with a wrench specifically designed for use with liquefied and nonliquefied compressed gas cylinders and a suitable torchtip cleaner to maintain torches in a safe operating condition.(d) Tests for leaks on the hose valves or gages of liquefied and nonliquefied compressed gas cylinders shall only be made with a soft brush and soapy water or soap suds, or other device approved by the Secretary.36 FR 22062, Nov. 19, 1971