BS EN ISO 4126-3:2006 PDF

BS EN ISO 4126-3:2006 Safety devices for protection against excessive pressure. Safety valves and bursting disc safety devices in combination BS EN ISO 4126-3 specifies the requirements for a product assembled from the in-series combination of safety valves or CSPRS (controlled safety pressure relief systems) according to BS EN ISO 4126-1, BS EN ISO 4126-4 and BS EN , and bursting disc safety devices according to BS EN installed within no more than five pipe diameters from the valve inlet. BS EN specifies the design, application and marking requirements for such products, which are used to protect pressure vessels, piping or other enclosures from excessive pressure, and which comprise the bursting disc safety device, a safety valve or CSPRS and, where applicable, a short length of connecting pipe or spool piece. In addition, it gives a method for establishing the combination discharge factor used in sizing combinations. Contents of BS EN :