![]() By following these harmonised standards, one is sure therefore to comply with the PED clauses supported by the paragraphs listed in the Annex ZA. For example, the standard for safety valves, EN 4126, is now the German standard DIN EN 4126, or the French standard NF EN 4126, etc… This harmonised standard has an annex (called ‘Annex ZA’) that lists the paragraphs which address the requirements of the PED. Likewise, the new EN standards have been introduced and they replace all the local standards. The PED has been introduced as the pressure vessel code in each and every country of the European Union. To support the PED, many European (EN) standards are now ‘harmonised’ with the PED. As taken from the harmonized standard EN 764-7 paragraphs: In any case, the required capacity must always be relieved at no more than MAP +10%. The others can be set up to MAP +5% (inclusive). In the case of multiple valves, only one valve needs to be set at no more than MAP. ![]()
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