Hose
(3) Hose. (i) Fuel gas and oxygen hoses shall be easily distinguishable from each other by color or sense of touch. Oxygen and fuel hoses shall not be interchangeable. Hoses having more than one gas passage shall not be used. (ii) When oxygen and fuel gas hoses are taped together, not more than four (4) of each 12 inches (10.16 cm of each 30.48 cm) shall be taped. (iii) Hose shall be inspected before use. Hose subjected to flashback or showing evidence of severe wear or damage shall be tested to twice the normal working pressure but not less than 200 p.s.i. (1378.96 kPa) before reuse. Defective hose shall not be used. (iv) Hose couplings shall not unlock or disconnect without rotary motion. (v) Hose connections shall be clamped or securely fastened to withstand twice the normal working pressure but not less than 300 p.s.i. (2068.44 kPa) without leaking. (vi) Gas hose storage boxes shall be ventilated. (4) Torches. (i) Torch tip openings shall only be cleaned with devices designed for that purpose. (ii) Torches shall be inspected before each use for leaking shut-off valves, hose couplings and tip connections. Torches with such defects shall not be used. (iii) Torches shall not be lighted from matches, cigarette lighters, other flames or hot work. (5) Pressure regulators. Pressure regulators, including associated gauges, shall be maintained in safe working order. (6) Operational precaution. Gas welding equipment shall be maintained free of oil and grease.