# The Simple Pressure Vessels (Safety) Regulations 2016, Paragraph 13


A manufacturer must take account of the fact that under the conditions of use envisaged—
(a) the vessels must not be subjected to stress likely to impair their safety in use;
(b) internal pressure must not permanently exceed the maximum working pressure PS. However, it may momentarily do so by up to 10%.

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Source: https://www.legislation.gov.uk/uksi/2016/1092/schedule/1/paragraph/13 (the official version)
Page: https://openlegislation.uk/simple-pressure-vessels-safety-regulations-2016/schedule-1/paragraph-13
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.