Oil and Gas Occupational Safety and Health Regulations

11.18 Every assembly of pipes, pipe fittings, valves, safety devices, pumps, compressors and other fixed equipment that is used for transferring a hazardous substance from one location to another shall be

• (a) marked, by labelling, colour-coding, placarding or any other mode, to identify the hazardous substance being transferred and, if appropriate, the direction of the flow;

• (b) fitted with valves and other control and safety devices to ensure its safe operation;

• (c) inspected by a qualified person before it is placed in service and once a year thereafter; and

• (d) maintained and repaired by a qualified person.