EN 1759-3:2003 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, Class designated - Part 3: Copper alloy flanges Incorporating Corrigendum July 2004
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.
EN 1759-3:2003 Referenced Document
EN 10028-2 Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels with specified elevated temperature properties*， 2017-07-01 Update
EN 10222-2 Steel forgings for pressure purposes - Part 2: Ferritic and martensitic steels with specified elevated temperatures properties*， 2021-05-31 Update
EN 12420 Copper and copper alloys - Forgings*， 2014-06-01 Update
EN 12449 Copper and copper alloys - Seamless, round tubes for general purposes*， 2023-06-28 Update
EN 1652 Copper and copper alloys - Plate, sheet, strip and circles for general purposes
EN 1982 Copper and copper alloys - Ingots and castings*， 2017-09-01 Update
EN ISO 4287 Geometrical Product Specifications (GPS) - Surface texture: Profile method - Terms@ definitions and surface texture parameters - Amendment 2*， 2013-04-01 Update
EN ISO 6708:1995 Pipework Components - Definition and Selection of DN (Nominal Size) (ISO 6708 : 1995)
EN ISO 887 Plain washers for metric bolts, screws and nuts for general purposes - General plan (ISO 887:2000)*， 2006-01-25 Update
EN 1759-3:2003 history
2003EN 1759-3:2003 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, Class designated - Part 3: Copper alloy flanges Incorporating Corrigendum July 2004