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  • 27 May 2015

ASTM A508-4N for Nuclear Industry

NGNP Project – A508 Material

CPE have manufactured pressure vessels using A508-4N material. The vessels were part of a project which was certified to both PD5500 Category 1 and ASME VIII Division 1. The vessels are destined to be used in both Europe and America. The scope of work included material control, design, welding, post weld heat treatment, post weld machining and testing of vessels from 50mm to 100mm wall thickness.

A508-4N is the preferred material for pressure vessels for the New Generation Nuclear Plant (NGNP) programme. It is a low alloy steel for operating temperatures up to 371°C.

The characteristics of the application and material require very tightly controlled quality heat treatments, weld procedures to ASME IX and ISO15614 and carefully controlled post weld heat treatment processes.

All work was carried out at CPE’s Tamworth workshops to the satisfaction of an unnamed UK nuclear company.

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Tamworth
Staffordshire
B79 7TA, UK

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