Pipe marking

Pipe labelling is an important safety measure that helps identify pipelines and their contents. Pipelines transport a variety of substances, from water and steam to flammable liquids and gases. To ensure that these substances are handled safely, it is important that pipelines are clearly labelled.

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The purpose of pipe labelling

The purpose of pipe labelling is to:

  • identify the contents of the pipeline
  • provide information on possible risks
  • help prevent accidents.

Pipe labelling should be in good condition and easy to read.

The labelling should be checked regularly and replaced if it is damaged or illegible.

Labelling of gases, liquids and ventilation

Pipelines for gases and liquids shall be labelled with the following information:

  • the content of the pipeline
  • pressure of the gas/liquid
  • dangerous properties of the gas/liquid.

Piping for ventilation shall be labelled with the following information:

  • whether the pipeline is for clean or polluted air
  • if the pipeline is too hot or cold air.

Labelling methods and maintenance of labels

There are different methods of pipe labelling. The most common methods are:

  • Signs and decals that are a visually effective method of pipe labelling. Signs and stickers can be made in different materials and sizes.
  • Pictograms are symbols used to represent hazards and risks. Pipe marking pictograms are standardised according to the Globally Harmonised System of Classification and Labelling of Chemicals (GHS).
  • Text that can be used to provide additional information about the contents of the pipeline and potential risks. Text labelling should be clear and legible.

Pipe and tank labelling requirements with CLP/GHS

Requirements for pipe labelling vary by country and industry. In Sweden, pipe labelling is regulated by the Swedish Work Environment Authority's regulations AFS 2023:10  and explained in the updated standard SS 741:2017, "Labelling of gas, liquid and ventilation installations".

Requirement for GHS4 labelling also for compressed air and gases H2 In addition, AFS 2023:10 stipulates that pipelines for gases, including air, with pressures above 2 bar must be labelled with GHS4 (pictogram for gas under pressure).

Water vapour is not considered a gas under CLP, but the Swedish Work Environment Authority recommends labelling with GHS4 also for vapour.

General labelling requirements

For pressurised equipment, including pipelines, the AFS 2002:1.

Collinder labelling system and Flo-Code pipe marking

Collinder Märksystem started with Flo-Code pipe marking in 1972 and has since developed many types of pipe marking adapted for different environments. See our guide here to review the different customisations and layouts available.

Not sure which pipe labelling is right for your needs? Contact us and we'll help you find the right one.

 

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