StacksVerified U.S. regulatory reference

30 CFR §56.4603

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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—
  1. (a)The cylinders are moved;
  2. (b)The torch and hoses are left unattended; or
  3. (c)The task or series of tasks is completed.