On Board Trains Occupational Health and Safety Regulations

7.15 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; and

• (c) adequate for its intended purpose having regard to the corrosiveness, pressure, temperature and other properties of the hazardous substance transferred therein.