30 C.F.R. § 57.4603 Closure of valves.
Title 30 - Mineral Resources
To prevent accidental release of gases from hoses and torches attached to oxygen and acetylene cylinders or to manifold systems, cylinder or manifold system valves shall be closed when— (a) The cylinders are moved; (b) The torch and hoses are left unattended; or (c) The task or series of tasks is completed.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart C—Fire Prevention and Control
Welding/Cutting/Compressed Gases
§ 57.4603 Closure of valves.
