Pipe Marking

Australian Standard AS1345-1995 specifies means of identifying the contents of pipes, conduits, ducts and sheathing used to contain fluids or for the distribution of electrical or communications services in land installations and on board ships, by the use of colours, words and symbols.
AS 1345-1995 specifies that markers be placed adjacent to all junctions, valves, service appliances, bulkhead and wall penetrations.
Markers shall be spaced no more than 8m apart except for long, uninterrupted straight runs of external services where spacing shall not exceed 50m. The Standard also addresses several elements of pipe marker design including: Marker Layout - a marker is comprised of a printed word or words on a coloured background with a contrasting border and chevron to show direction of flow.