Ball valves certified to asme iii
November 1st 2007 Heap & Partners, in partnership with fellow BVAA members LG Ball Valves, have completed a contract for the supply of 80 ball valves certified to ASME III Class 1 and 2. The valves supplied were 0.5, 1.5 and 3in Class 600 top entry design with butt weld end connections. All incorporated a number of special features, including leak detection connections, double stem sealing and double gaskets. As the valves were destined for installation at two UKbased nuclear power plants, seismic qualification was a further requirement. The 100% nondestructive testing and BS EN 10204 3.1 material certification was required for all components, not just pressure containing parts, with witnessed inspection at many of the manufacturing stages. After initial build, all valves were tested to 65bar, after which the Class 1 valves were stripped and non-destructive examination repeated. More articles from Heap & Partners Limited: | 
