# The Pressure Systems and Transportable Gas Containers Regulations 1989, Paragraph 5


Any pipeline and its protective devices in which the pressure does not exceed 2 bar above atmospheric pressure (or 2.7 bar above atmospheric pressure if the normal pressure does not exceed 2 bar and the overpressure is caused solely by the operation of a protective device).

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Source: https://www.legislation.gov.uk/uksi/1989/2169/schedule/2/part/I/paragraph/5 (the official version)
Page: https://openlegislation.uk/pressure-systems-and-transportable-gas-containers-regulations-1989/schedule-2/part-I/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.