• BS EN 13555-2004 Flanges and their joints. Gasket parameters and test procedures relevant to the design rules for gasketed circular flange connecti..pdf
• BS EN 1092-1-2007 Flanges and their joints - Circular flanges for pipes valves fittings and accessories PN designated - Part 1 Steel flanges.pdf
• BS EN 1092-2-1997 Flanges and their joints. Circular flanges for pipes valves fittings and accessories PN designated. Cast iron flanges.pdf
• BS EN 215-2004 Thermostatic radiator valves - Requirements and test methods.pdf
• BS EN 12266-2:2002 Industrial valves-Testing of valves-Part 2: Tests test procedures and acceptance criteria-Supplementary requirements.pdf
• ASME B16.34-2004 Valves - Flanged Threaded and Welding End.pdf
• BS 2080-1989 Specification for face-to-face centre-to-face end-to-end and centre-to-end dimensions of valves.pdf