OHS Code

Published Date: July 01, 2009
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Part 10 Fire and Explosion Hazards

Section 171 Compressed and liquefied gas

(1) An employer must ensure that

(a) compressed or liquefied gas containers are used, handled, stored and transported in accordance with the manufacturer’s specifications,

(b) a cylinder of compressed flammable gas is not stored in the same room as a cylinder of compressed oxygen, unless the storage arrangements are in accordance with Part 3 of the Alberta Fire Code (1997),

(c) compressed or liquefied gas cylinders, piping and fittings are protected from damage during handling, filling, transportation and storage,

(d) compressed or liquefied gas cylinders are equipped with a valve protection cap if manufactured with a means of attachment, and

(e) oxygen cylinders or valves, regulators or other fittings of the oxygen-using apparatus or oxygen distributing system are kept free of oil and grease.

(2) An employer must ensure that a compressed or liquefied gas system is not exposed to heat sources that generate temperatures that may

(a) result in the failure or explosion of the contents or the system, or

(b) exceed the maximum exposure temperatures specified by the manufacturer.

(3) An employer must ensure that a compressed or liquefied gas system is kept clean and free from oil, grease and other contaminants that may

(a) cause the system to fail, or

(b) burn or explode if they come in contact with the contents of the system.

(4) An employer must ensure that on each hose of an oxygen-fuel system,

(a) a flashback device is installed at either the torch end or the regulator end, and

(b) a back-flow prevention device is installed at the torch end.

(5) An employer must ensure that compressed or liquefied gas cylinders are  secured, preferably upright, and cannot fall or roll unless a professional engineer certifies another method that protects against the hazards caused by dislodgment.

(6) Despite subsection (5), an employer must ensure that a cylinder containing acetylene is secured and stored upright.

(7) Moved to section 170.1(5)

(8) A worker must ensure that

(a) compressed gas equipment designed to be used with a specific gas is only used with that gas,

(b) the cylinder valve is shut off and pressure in the hose is released when cutting or welding is not in progress,

(c) sparks, flames or other sources of ignition are not allowed to come in contact with the cylinders, regulators or hoses of a compressed or liquefied gas system, and

(d) compressed air is not used to blow dust or other substances from clothing.