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34:. It specifies requirements for the design, manufacture, inspection and testing of unfired pressure vessels made from carbon, ferritic alloy, and austenitic steels. It also includes material supplements containing requirements for vessels made from aluminium, copper, nickel, titanium and duplex. PD 5500 is the UK’s national pressure vessels code, although the code is used outside the UK. A new edition of
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enacted the PED into UK law. Since the UK exited the
European Union, the PED no longer applies and the Pressure Equipment Safety Regulations 2016 have been amended by the enactment of the UK Product Safety and Metrology Regulations, which update a number of pieces of legislation which required
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amendments to operate outside of the EU. Under this new legislation
Harmonised Standards are now referred to as Designated Standards, but the practice of demonstrating compliance remains largely the same.
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was introduced as the harmonized standard. Harmonized standards carry presumed conformity with the requirements of the
Pressure Equipment Directive, whereas other pressure vessel design codes such as
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must demonstrate conformity against each of the
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