OHS Code Explanation Guide

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

Section 174 Handling cylinders

Subsections (3) and (4) make a distinction between a welding service vehicle being “not in service” versus a welding service vehicle that is “not in use”. Examples of when a welding service vehicle is “not in service” include:

(a) the vehicle is in a maintenance shop for repairs;
(b) the vehicle stands idle while the operator is on holidays; and
(c) the vehicle is being used for purposes other than providing welding services.

When this is the case, the worker must close compressed gas cylinder valves, remove regulators if they are not integral to the cylinder, and put on and secure the valve protection caps or plugs.

Examples of when a welding service vehicle is “not in use” include:

(a) welding activities are completed for the shift, day, etc. but will soon resume;
(b) while driving on public or private roads; and
(c) when the vehicle is parked unattended and at the end of the shift.

When this is the case, the worker must shut off the cylinder valve and release the pressure in the hose(s).