Identification & Compliance Solutions
Identification & Compliance Solutions

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Pipe marking standards are provided by the AS/NZ Code. Other pipe marking codes may apply for specialized applications. An Example is, the IIAR publishes codes for marking ammonia pipes used in refrigeration systems and the EN/DIN pipe marker standards are applied in Europe.

Labels on pipes and valves deliver important safety information. They teach staff, vendors, contractors, customers, and emergency response teams about the contents of the pipe, the hazardous material inside, and the directional flow through the pipe. This is critical information during an emergency situation.

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The contents of the pipe in above ground piping are separated into three hazard categories and have different color-coded labels.

High Hazard Materials: All high hazard materials use black characters on a yellow background

Low Hazard Materials: The low hazard materials are divided into two different color schemes depending on physical state:

  • Liquid materials are to be labeled using white lettering on a green background
  • Gaseous materials are to be labeled using white characters on a blue background

Fire Suppression Materials: Labels for fire suppression materials are to use white letters on a red background

A label is to be placed on a pipe in a manner that makes it easy to read. Labels should be placed on the lower side of the pipe if the employee has to look up to the pipe, on the upper side of the pipe if the employee has to look down at the pipe. Labels have to be applied on all differing ranges of piping segments, including pipes that can change direction or pass through walls and floors. They are also be placed at regular intervals on long runs of straight pipe.