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1、BRITISH STANDARD BS EN 1759-1:2004 Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, Class designated Part 1: Steel flanges, NPS 1/2 to 24 The European Standard EN 1759-1:2004 has the status of a British Standard ICS 23.040.60 BS EN 1759-1:2004 This British Stand
2、ard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2004 BSI 30 November 2004 ISBN 0 580 44924 6 National foreword This British Standard is the official English language version of EN 1759-1:2004. It supersedes BS 1560-3.1:1989 which is withdrawn. The
3、UK participation in its preparation was entrusted to Technical Committee PSE/15, Flanges, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or Europe
4、an publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all
5、 the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on
6、 the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 74, an inside back cov
7、er and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments W - - - - - - - - - - - - - - - - - - - - - 7-7- - - - - $ -$ * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
8、- - - - - - W W D - - w - - - - EN 1759-1:2004 (E) 2 Contents Page Foreword3 Introduction.4 1 Scope 5 2 Normative references5 3 Terms and definitions .6 4 Designation 7 5 General requirements8 Annex A (informative) Recommendations for weld ends of weld-neck flanges.65 Annex B (informative) Classific
9、ation of bolting materials 66 Annex C (informative) Use of metric bolting in lieu of imperial bolting.67 Annex D (informative) Determination of p/T ratings for flanges using EN materials.69 Annex E (normative) Approximate masses of flanges and collars 70 Bibliography74 EN 1759-1:2004 (E) 3 Foreword
10、This document (EN 1759-1:2004) has been prepared by Technical Committee CEN/TC 74 “Flanges and their joints“ the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest b
11、y May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. EN 1759 consists of the following parts: Part 1: Steel flanges; Part 3: Copper alloy flanges1; Part 4: Aluminium alloy flanges1. This document includes a Bibliography. According to the CEN/CENELEC Internal R
12、egulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands
13、, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. 1 To be published EN 1759-1:2004 (E) 4 Introduction When Technical Committee, CEN/TC 74, commenced its work of producing this European standard it took as its basis, the International Standard, ISO 7005-1,
14、 Steel flanges. In taking this decision, CEN/TC 74, agreed that this standard would differ significantly from the ISO standard in respect of the following: a) Whereas ISO 7005-1 included in its scope both the original DIN based flanges and also the original ANSI/ASME based flanges, EN 1759-1 contain
15、s only the flanges with ANSI/ASME origin (ASME B16.5). CEN/TC 74 has produced a separate series of standards, EN 1092 Parts 1, 2, 3 and 4, dealing with the DIN based flanges in PN designations; b) In this standard, the flanges are Class designated (not PN designated as in the ISO standard) and those
16、 dimensions taken from ASME B16.5 are hard metricated. Consequently, whilst the mating dimensions, the flange and facing types and designations are compatible with those given in ISO 7005-1, it is important to take account of the following differences which exist in EN 1759-1: 1) The use of inch bol
17、ting requires the use of suitable gaskets, not necessarily compatible with the gaskets used with ISO 7005-1 flanges (for metric bolts). 2) This standard specifies grades of ASTM steels similar to those specified in ISO 7005-1, but in addition permits the use of grades of European steels according to
18、 EN 1092-1; EN 1759-1:2004 (E) 5 1 Scope This European Standard for a single system of flanges specifies requirements for circular steel flanges in Class designations Class 150 to Class 2 500 and nominal sizes from NPS to NPS 24. NOTE The relationship between nominal size (DN) and nominal size (NPS)
19、 is given for reference purposes in Tables 9 to 14. This standard specifies the flange types and their facings, dimensions, tolerances, threading, bolt sizes, flange jointing face surface finish, marking, materials and pressure/temperature ratings. This standard does not apply to flanges made from b
20、ar stock by turning, or to flanges of types 11, 12, 13, 14 and 15 made from plate material. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest editi
21、on of the referenced document (including any amendments) applies. EN 1515-1, Flanges and their joints Bolting Part 1: Selection of bolting prEN 1515-3, Flanges and their joints Bolting Part 3: Classification of bolt materials for steel flanges, class designated EN 10025, Hot rolled products of non-a
22、lloy structural steels Technical delivery conditions EN 10028-2, Flat products made of steels for pressure purposes Part 2: Non alloy and alloy steels with specified elevated temperature properties EN 10028-3, Flat products made of steels for pressure purposes Part 3: Weldable fine grain steels, nor
23、malized EN 10028-4, Flat products made of steels for pressure purposes Part 4: Nickel alloy steels with specified low temperature properties EN 10028-7, Flat products made of steels for pressure purposes Part 7: Stainless steels EN 10213-2, Technical delivery conditions for steel castings for pressu
24、re purposes Part 2: Steel grades for use at room temperature and elevated temperatures EN 10213-3, Technical delivery conditions for steel castings for pressure purposes Part 3: Steel grades for use at low temperatures EN 10213-4, Technical delivery conditions for steel castings for pressure purpose
25、s Part 4: Austenitic and austenitic-ferritic steel grades EN 10222-2, Steel forgings for pressure purposes Part 2: Ferritic and martensitic steels with specified elevated temperature properties EN 10222-3, Steel forgings for pressure purposes Part 3: Nickel steels with specified low temperature prop
26、erties EN 10222-4, Steel forgings for pressure purposes Part 4: Weldable fine grain steels with high proof strength EN 10222-5, Steel forgings for pressure purposes - Part 5: Martensitic, austenitic and austenitic-ferritic stainless steels EN ISO 887, Plain washers for metric bolts, screws and nuts
27、for general purposes - General plan (ISO 887:2000) EN ISO 6708, Pipe components Definition and selection of DN (nominal size) (ISO 6708:1995) ISO 4955, Heat-resisting steels and alloys EN 1759-1:2004 (E) 6 ISO 4991, Steel castings for pressure purposes ISO 9327-1, Steel forgings and rolled or forged
28、 bars for pressure purposes Technical delivery conditions Part 1: General requirements ISO 9327-2, Steel forgings and rolled or forged bars for pressure purposes Technical delivery conditions Part 2: Non-alloy and alloy (Mo, Cr and CrMo) steels with specified elevated temperature properties ISO 9328
29、-2, Steel flat products for pressure purposes Technical delivery conditions Part 2: Non-alloy and alloy steels with specified elevated temperature properties ISO 9328-3, Steel flat products for pressure purposes Technical delivery conditions Part 3: Weldable fine grain steels, normalized ISO 9328-5,
30、 Steel flat products for pressure purposes Technical delivery conditions Part 5: Weldable fine grain steels, thermomechanically rolled ASME B16.5: 1996 Pipe flanges and flanged fittings NPS through NPS 24 ASME/ANSI B1.20.1, Pipe threads, general purpose (inch) ASTM A105/A105M, Forgings, Carbon Steel
31、, for Piping Component ASTM A182/A182M, Forged or Rolled Alloy-Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High- Temperature Service ASTM A203/A203M, Pressure Vessel Plates, Alloy Steel, Nickel ASTM A204/A204M, Specification for pressure vessel plates, alloy steel, molybdenum ASTM
32、A216/A216M, Steel Castings, Carbon Suitable for Fusion Welding for High-Temperature Service ASTM A217/A217M, Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts Suitable for High- Temperature Service ASTM A240/A240M, Heat-Resisting Chromium and Chromium-Nickel Stainless St
33、eel Plate, Sheet, and Strip for Pressure Vessels ASTM A325, High-Strength Bolts for Structural Steel Joints ASTM A350/A350M, Forgings, Carbon and Low-Alloy Steel, Requiring Notch Toughness Testing for Piping Components ASTM A351/A351M, Castings, Austenitic, Austenitic-Ferritic (Duplex) for Pressure-
34、Containing Parts ASTM A352/A352M, Steel Castings, Ferritic and Martensitic, for Pressure-Containing Parts Suitable for Low- Temperature Service ASTM A387/A387M, Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum ASTM A515/A515M, Pressure Vessel Plates, Carbon Steel, for Intermediate and Higher
35、-Temperature Service ASTM A516/A516M, Pressure Vessel Plates, Carbon Steel, for Moderate and Lower-Temperature Service ASTM A537/A537M, Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel 3 Terms and definitions For the purposes of this European Standard, the following terms and def
36、initions apply. 3.1 Class alphanumeric designation used for reference purposes related to a combination of mechanical and dimensional characteristics of a component of a pipework system. It comprises the word Class followed by a dimensionless whole number NOTE 1 The number following the word Class d
37、oes not represent a measurable value and should not be used for calculation purposes except where specified in the relevant standard. EN 1759-1:2004 (E) 7 NOTE 2 The designation Class is not meaningful unless it is related to the relevant component standard number. NOTE 3 It is intended that all com
38、ponents with the same Class and NPS (see below) designations should have the same mating dimensions for compatible flange types. 3.2 DN see EN ISO 6708 3.3 NPS alphanumeric designation of size for components of a pipework system, which is used for reference purposes. It comprises, for the purpose of
39、 Class designated flanges according to this standard, the letters NPS followed by a dimensionless number which is indirectly related to the physical size of the bore or outside diameter of the end connections NOTE The number following the letters NPS does not represent a measurable value and should
40、not be used for calculation purposes except where specified in the relevant standard. 3.4 maximum allowable pressure, PS means the maximum pressure for which the equipment is designed, as specified by the equipment manufacturer 3.5 maximum allowable temperature, TS means the maximum temperature for
41、which the equipment is designed, as specified by the equipment manufacturer 4 Designation 4.1 General Table 1 and Figure 1 show the flange types and their relevant type numbers. Flanges shall be denoted with “flange type“ and “flange number“. Figure 2 shows flange facing types, which may be used wit
42、h the flanges shown in Figure 1. Flange facings shall be denoted with “type“ and the relevant symbol. The range of NPS, applicable to each flange type and each Class designation shall be as given in Table 2. 4.2 Information to be supplied by the equipment manufacturer The following information shoul
43、d be supplied by the equipment manufacturer in the enquiry and/or order. Flanges and ancillary components in accordance with this standard shall be designated with the following: a) Designation, e.g. flange, lapped or collar; b) Number of this standard, EN 1759-1; c) Flange type number (see Table 1); d) Facing type number (see Figure 2); e) Nominal size (NPS or DN); f) Class designation followed by the appropriate number; g) The bore for weld-neck (type 11) and hubbed slip-on (type 12) flanges, if different from those specified in this standard (see notes to Tables o