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There are outstanding changes not yet made by the legislation.gov.uk editorial team to The Simple Pressure Vessels (Safety) Regulations 1991. Any changes that have already been made by the team appear in the content and are referenced with annotations.
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8. The manufacturer must, when designing the vessel, define the use to which it will be put, and select:U.K.
the minimum working temperature;
the maximum working temperature; and
the maximum working pressure.
However, should a minimum working temperature higher than minus 10° C be selected, the properties required of the materials must be satisfied at minus 10° C.The manufacturer must also take account of the following requirements:
it must be possible to inspect the inside of the vessels;
it must be possible to drain the vessels;
the mechanical qualities must be maintained throughout the period of use of the vessel for its intended purpose;
the vessels must, bearing in mind their envisaged use, be adequately protected against corrosion,
and of the fact that under the conditions of use envisaged:
the vessels will not be subjected to stresses likely to impair their safety in use; and
the internal pressure will not permanently exceed the maximum working pressure; however, it may momentarily do so by up to 10%.Circular and longitudinal seams must be made using full penetration welds or welds of equivalent effectiveness. Dished ends other than hemispherical ones must have a cylindrical edge.
Commencement Information
I1Sch. 1 para. 8 in force at 31.12.1991, see reg. 1(2)
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