# The Simple Pressure Vessels (Safety) Regulations 2016, Paragraph 14


Circumferential and longitudinal seams must be made using full penetration welds or welds of equivalent effectiveness and convex ends, other than hemispherical ones, must have a cylindrical edge.

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Source: https://www.legislation.gov.uk/uksi/2016/1092/schedule/1/paragraph/14 (the official version)
Page: https://openlegislation.uk/simple-pressure-vessels-safety-regulations-2016/schedule-1/paragraph-14
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.