1、BRITISH STANDARD BS EN 10242:1995 Incorporating Amendments Nos. 1 and 2 Threaded pipe fittings in malleable cast iron The European Standard EN 10242:1994, with the incorporation of amendments A1:1999 and A2:2003, has the status of a British Standard ICS 23.040.40 BS EN 10242:1995 This British Standa
2、rd, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1995 BSI 28 August 2003 The following BSI references relate to the work on this standard: Committee reference PSE/9 Draft for c
3、omment 91/84067 DC ISBN 0 580 24509 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PSE/9, Pipe fittings other than cast iron, upon which the following bodies were represented: British Compressed Air Society British Flu
4、id Power Association British Gas plc British Malleable Tube Fittings Association British Plumbing Fittings Manufacturers Association British Valve and Actuator Manufacturers Association Energy Industries Council Engineering Equipment and Materials Users Association Galvanizers Association Institutio
5、n of Civil Engineers Institution of Water and Environmental Management Ministry of Defence Steel Tube Fittings Manufacturers Technical Association Amendments issued since publication Amd. No. Date Comments 10587 April 2000 14428 28 August 2003 Indicated by a sidelineBS EN 10242:1995 BSI 28 August 20
6、03 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 10242 5BS EN 10242:1995 ii BSI 28 August 2003 National foreword This British Standard has been prepared under the direction of Technical Committee PSE/9, Pipe fittings other than cast iron, and is
7、 the English language version of EN 10242:1994 Threaded pipe fittings in malleable cast iron, including amendment A1:1999 and amendment A2:2003, as corrected by corrigendum August 1999, published by the European Committee for Standardization (CEN). This standard partially supersedes BS 143 and BS 12
8、56:1986, which has been amended. Cross-references The British Standards which implement international or European 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 o
9、f the BSI Electronic Catalogue or of British Standards online. This publication does not purport to include all 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. Sum
10、mary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 38, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Sidelining in this document indicates
11、the most recent changes by amendment.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10242 November 1994 +A1 April 1999 +A2 March 2003 ICS 23.040.40 incorporating corrigendum August 1999 Descriptors: pipe fittings, threaded fittings, cast iron, malleable cast iron, designation, design, dimensio
12、ns, dimensional tolerances, screw thread, characteristics, tests, inspection, marking English version Threaded pipe fittings in malleable cast iron (includes amendments A1:1999 and A2:2003) Raccords de tuyauterie filets en fonte mallable (inclut les amendements A1:1999 et A2:2003) Gewindefittings au
13、s Tempergu (enthlt nderungen A1:1999 und A2:2003) This European Standard was approved by CEN on 1994-11-10; amendment A2 was approved by CEN on28November2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard th
14、e status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German
15、). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czechrepublic, Denmark, Finla
16、nd, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue
17、de Stassart 36, B-1050 Brussels 1994 Copyright reserved to CEN members Ref. No. EN 10242:1994 + A1:1999 + A2:2003 EEN 10242:1994 BSI 28 August 2003 2 Foreword This European Standard has been prepared by ECISS/TC 29 of which the Secretariat is held by UNSIDER. This European Standard shall be given th
18、e status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 1995, and conflicting national standards shall be withdrawn at the latest by May 1995. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement
19、 this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A1 This amendment EN 10242:1994/A1:1999 to EN 10242:1994
20、has been prepared by Technical Committee ECISS/TC 29, Steel tubes and fittings for steel tubes the Secretariat of which is held by UNI. This amendment to the European Standard EN 10242:1994 shall be given the status of a national standard, either by publication of an identical text or by endorsement
21、, at the latest by October 1999, and conflicting national standards shall be withdrawn at the latest by October 1999. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France,
22、Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A2 This document (EN 10242:1994/A2:2003) has been prepared by Technical Committee ECISS/TC 29, Steel tubes and fittings for steel tubes, the S
23、ecretariat of which is held by UNI. 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 by September 2003, and conflicting national standards shall be withdrawn at the latest by September 2003. According
24、 to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norw
25、ay, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom.EN 10242:1994 BSI 28 August 2003 3 Contents Page Foreword 2 1S c o p e 5 2 Normative references 5 3 Types of fitting 5 4T e r m i n o l o g y 8 5M a t e r i a l s 9 6D e s i g n 1 0 7 Dimensions and tolerances 11 8T h r e a d
26、s 1 2 9 Manufacture 13 10 Required characteristics 13 11 Testing and inspection 14 12 Clause deleted 15 13 Designation of fittings 15 14 Marking 16 Annex A (normative) Malleable cast iron fittings threaded to ISO 7-1 but having internal threads type Rc 37 Annex B (informative) Quality assurance syst
27、em and assessment of conformity 37 Annex C (informative) Relationship with the essential requirements of the Construction Products Directive (89/106/EEC) 38 Annex D (informative) Relationship between fitting size and nominal size (DN) 38 Annex E (informative) Bibliography 38 Figure 1 Forms of reinfo
28、rcements 9 Figure 2 Laying lengths z in the case of an angularly disposed fitting 11 Figure 3 Laying length z in the case of an axially aligned fitting 12 Figure 4 Pressure/temperature ratings 13 Figure 5 Sequence of specifying outlets when the above mentioned abbreviated method does not apply 16 Ta
29、ble 1 Index of fitting types, symbols and index to tables and patterns 6 Table 2 Design symbols 10 Table 3 Tolerance on length 11 Table 4 Lengths of engagement 12 Table 5 Minimum depth of spanner flats 12 Table 6 Pressure/temperature ratings 13 Table 7 Design test pressures 13 Tables of dimensionall
30、y standardized fitting types and sizes (Tables 8 to 27) 17 Table A.1 Design symbols 37 Table C.1 Characteristics and corresponding clause in this standard for the essential requirements 38 Table D.1 Thread designation and nominal size 384 blankEN 10242:1994 BSI 28 August 2003 5 1 Scope This standard
31、 specifies the requirements for the design and performance of threaded pipe fittings in malleable cast iron. These fittings are for general purposes for the transmission of fluids and gases up to the limits of pressure and temperature specified in this standard. They are intended for the connection
32、of elements threaded in accordance with ISO 7-1, sizes ( to 6. For use in conditions outside the pressure and temperature limits specified, reference shall be made to the manufacturer. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other pub
33、lications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revi
34、sion. For undated references the latest edition of the publication referred to applies (including amendments). EN 10204:1991, Metallic products Types of inspection documents. EN ISO 9001, Quality systems Model for quality assurance in design, development, production, installation and servicing. (ISO
35、 9001:1994) EN ISO 9002, Quality systems Model for quality assurance in production, installation and servicing. (ISO 9002:1994) EN 45012, General criteria for certification bodies operating quality system certification. EN 1562, Founding Malleable cast irons. ISO 7-1, Pipe threads where pressure-tig
36、ht joints are made on the threads Part 1: Dimensions, tolerances and designation. EN ISO 228-1, Pipe threads where pressure tight joints are not made on the threads Part 1: Dimensions, tolerances and designation (Revision of ISO 228-1:2000). EN ISO 6708, Pipework components Definition and selection
37、of DN (nominal size) (ISO 6708:1995). 3 Types of fitting Table 1 gives an index to the fitting types, and patterns and symbols. The symbols relate to the identification of fittings and may be used for designation (see 13.1).EN 10242:1994 6 BSI 28 August 2003 Table 1 Index of fitting types, symbols a
38、nd index to tables and patterns Types Patterns Symbols A1 A1/45 A4 A4/45 A Elbows Table 8 Table 9 Table 10 Table 8 Table 9 Table 10 Symbols B1 B Tees Table 8 Table 11 Table 11 Table 12 Table 12 Symbols C1 C Crosses Table 8 Table 13 Symbols D1 D4 D Short bends Table 14 Table 14 Symbols E1 E2 E Pitche
39、r tees Twin elbows Table 14 Table 15 Table 15 Table 15 Table 14 Table 16 Symbols G1 G1/45 G4 G4/45 G8 G Long sweep bends Table 17 Table 18 Table 17 Table 18 Table 17EN 10242:1994 BSI 28 August 2003 7 Table 1 Index of fitting types, symbols and index to tables and patterns (continued) Types Patterns
40、Symbols M2 M4 M Sockets Table 19 Table 19 Table 20 Table 20 Symbols N4 N8 N Bushings Hexagon nipples Table 21 Table 21 Table 21 Table 22 Table 22 Symbols P4 P Backnuts Table 23 Symbols T1 T8 T9 T11 T Caps Plugs Table 24 Table 24 Table 24 Table 24 Symbols U1 U2 U11 U12 U Union Table 25 Table 25 Table
41、 25 Table 25 Symbols UA1 UA2 UA11 UA12 UA Union elbows Table 26 Table 26 Table 26 Table 26 Symbols Za1 Za2 Za Side outlet elbows and tees Table 8 Table 8EN 10242:1994 8 BSI 28 August 2003 4 Terminology For the purposes of this standard, the following terms and definitions apply. 4.1 fitting connecti
42、ng piece, of one or more parts 4.2 jointing thread thread complying with ISO 7-1 4.3 fastening thread thread complying with ISO 228-1 4.4 fitting size size designation of the threads of the threaded outlets as derived from ISO 7-1 (see also Clause 13) 4.5 designation of thread size same definition a
43、s for fitting size (see 4.4) 4.6 nominal size; DN for definition see EN ISO 6708 NOTE 1 Nominal size is designated by the letters DN followed by the appropriate number. NOTE 2 The relationship between fitting size and nominal size (DN) is given in Annex D for guidance only. NOTE 3 Nominal size (DN)
44、should not be used for the designation of fitting size. 4.7 reinforcement additional material on the outside diameter of an internally threaded fitting in the form of a band or bead 4.8 rib local and axially aligned additional material on the outside or inside of a fitting for assistance in assembly
45、 or manufacturing 4.9 outlet internally or externally threaded end of a fitting, which connects with a tube, fitting or other component, which is threaded in accordance with ISO 7-1 4.10 run two principal axially aligned outlets of a tee or cross 4.11 branch side outlet(s) of a tee, pitcher tee, or
46、cross 4.12 chamfer removal of a conical portion at the entrance of a thread to assist assembly and prevent damage to the start of the thread 4.13 face-to-face dimension distance between the two parallel faces of axially aligned outlets of a fittingEN 10242:1994 BSI 28 August 2003 9 4.14 face-to-cent
47、re dimension distance between the face of an outlet and the central axis of an angularly disposed outlet 4.15 laying length average distance from the assembled pipe end to the axis of the fitting, or between the ends of two assembled pipes (see 7.2) 5 Materials 5.1 Material of the fitting 5.1.1 Mall
48、eable cast iron The material used shall be malleable cast iron in accordance with the requirements of EN 1562. The grade of material used shall be selected from the following grades depending on the design symbol chosen (see 6.1). grades EN-GJMW-400-5 or EN-GJMW-350-4 for fittings in whiteheart mall
49、eable iron; grades EN-GJMB-350-10 or EN-GJMB-300-6 for fittings in blackheart malleable iron. 5.1.2 Other ferrous materials Notwithstanding this requirement, any other ferrous materials which give mechanical properties at least equivalent to those malleable cast irons specified above will be allowed for straight fittings not larger than ), but excluding unions. 5.2 Hot dip zinc coating Where a protection by zinc coating is requi
