30 CFR Part 57Public Domain
§ 57.4603 — Closure of valves
Subpart C — Fire Prevention and Control
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.
Public Domain: 30 CFR Part 57 (MSHA Safety and Health Standards — Underground Metal and Nonmetal Mines) is a U.S. government publication and is not subject to copyright. Text extracted from the official source ↗. Figures are served from the eCFR; if one does not load, use the link in its place.