BS EN 1759-3:2003

Flanges and their joints. Circular flanges for pipes, valves, fittings and accessories, class designated. Copper alloy flanges | Status: Current, Under review

1 Scope This European Standard specifies requirements for circular copper alloy flanges and copper alloy collars combined with loose steel plate flanges in Class designations Class 150 and Class 300 and nominal sizes from DN 10 to DN 900 (NPS ½ to NPS 36) in the types shown in Table 1. This standard also specifies dimensions and tolerances, materials and their associated pressure/temperature (p/T) ratings, flange facings and related surface finish, weld repairs and marking together with information on bolting, gaskets, application and installation and approximate flange masses. The flanges specified, with the exception of integral (type 21) flanges, are for attachment to copper or copper alloy tubes in accordance with EN 12449.

NOTE 1 The size of copper and copper alloy tubes is designated by reference to the outside diameter in millimetres.

NOTE 2 See also annex B.

NOTE 3 Non-gasketed pipe joints are outside the scope of this standard.

Table 1 — Types of flanges and collars Type No. Description 01 Plate flange in copper alloy for brazing or welding 04 Loose plate flange in steel with a weld-neck collar (type 34) in copper alloy, for welding 05 Blank flange in copper alloy 05C Blank flange in steel clad with a copper alloy jointing face 07 Loose plate flange in steel with a slip-on collar (type 37) in copper alloy, for soft soldering, brazing or welding 11 Weld-neck flange in copper alloy for welding 12 Hubbed slip-on flange in copper alloy, for soft soldering, brazing or welding 14 Hubbed slip-on flange in copper alloy supplied with tube stops, for soft soldering, brazing or welding 21 Integral flange in copper alloy as part of some other equipment or component 34 Weld-neck collar in copper alloy 37 Slip-on collar in copper alloy Figure 1 — Types of flanges and collars