Pressure systems

A pressure system is a system (fixed or mobile) comprising one or more pressure vessels of rigid construction and any associated pipework and protective devices. It includes a pipeline and its protective devices that carries:

  • steam at any pressure
  • gases that exert a pressure above 0.5 bar above atmospheric pressure
  • fluids, which may be mixtures of liquids, gases and vapours, where the gas or vapour phase may exert a pressure above 0.5 bar above atmospheric pressure

The stored energy in pressures systems pose a serious risk of injury if inappropriately installed, used or maintained. The following details how to manage these risks, including information on:

  • provision of information and marking
  • design, construction and modification
  • installation
  • safe operating limits
  • written scheme of examination
  • examination in accordance with the written scheme
  • action in case of imminent danger
  • operation of pressure systems
  • maintenance
  • keeping of records
  • gas cylinders

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