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The Simple Pressure Vessels (Safety) Regulations 2016
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PART 3Manufacturing processes
18. Vessels must be constructed and subjected to production checks in accordance with Parts 2, 3 or 4 of Schedule 2.
Preparation of the component parts
19. Preparation of the component parts (for example forming and chamfering) must not give rise to surface defects or cracks or changes in the mechanical characteristics likely to be detrimental to the safety of the vessels.
Welds on pressurised parts
20. The characteristics of welds and adjacent zones must be similar to those of the welded materials and must be free of any surface or internal defects detrimental to the safety of the vessels.
21.—(1) Welds must be performed by qualified welders or operators possessing the appropriate level of competence, in accordance with approved welding processes.
(2) In sub-paragraph (1)—
(a)“qualified” means qualified by means of tests carried out by a notified body; and
(b)“approved” means approved by a notified body.
22. The manufacturer must also, during manufacture, ensure consistent weld quality by conducting appropriate tests using adequate procedures. These tests must be the subject of a report.
Putting into service of the vessels
23. Vessels must be accompanied by the instructions and safety information.
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