1、DEUTSCHE NORM Auaust 2000 Steel threaded pipe fittings English version of DIN EN 10241 I DIN - I EN10241 ICs 23.040.40 Stahlfittings mit Gewinde Supersedes DIN 2980, DIN 2982, DIN 2983, DIN 2986, DIN 2987-1, DIN 2987-2, DIN 2988, DIN 2990, DIN 2991, DIN 2993, September 1977 editions, and DIN 2981, A
2、ugust 1982 edition. European Standard EN 10241 : 2000 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been prepared by ECISS/TC 29. The responsible German body involved in its preparation was the Normenausschuss Rohrleitungen und Dampfkess
3、elanlagen (Pipelines and Pressure Vessels Standards Committee), Technical Committee Fittings. The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are as follows: IS0 7-1 DIN 2999-1 IS0 228-1 DIN IS0 228-1 IS0 6708 DIN EN IS0 6708 Amendments DIN 2993, Sept
4、ember 1977 editions, and DIN 2981, August 1982 edition, have been superseded by the specifications of EN 10241. DIN 2980, DIN 2982, DIN 2983, DIN 2986, DIN 2987-1, DIN 2987-2, DIN 2988, DIN 2990, DIN 2991, Previous edition DIN 2980: 1942-03, 1962-06, 1977-09; DIN 2981 : 1942-03, 1962-06, 1977-09, 19
5、82-08; DIN 2982: 1942-03, 1962-06, 1977-09; DIN 2983: 1942-03, 1962-06, 1977-09; DIN 2986: 1942-03, 1959-08, 1977-09; DIN 2987: 1942-03; DIN 2987-1 : 1962-06, 1977-09; DIN 2987-2: 1962-06, 1977-09; DIN 2988: 1942-03, 1959-08, 1977-09; DIN 2990: 1942-03, 1962-06, 1977-09; DIN 2991 : 1942-03, 1962-06,
6、 1963-04, 1977-09; DIN 2993: 1942-03, 1962-08, 1977-09. National Annex NA Standards referred to (and not included in Normative references) DIN 2999-1 Pipe threads for tubes and fittings - Parallel internal threads and taper external threads -Thread dimensions DIN EN IS0 6708 Pipework components - De
7、finition and selection of DN (nominal size) (IS0 6708 : 1995) EN comprises 31 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN EN 10241 : 2000-0 hiDeutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, s the exclusive righ
8、t of sale for German Standards (DIN-Normen). English pricegroup 15 Sales No. 1115 o1 .o1 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10241 April 2000 ICs 23.040.40 English version Steel threaded pipe fittings Raccords filets en acier Stahlfittings mit Gewinde This European Standard was appr
9、oved by CEN on 2000-29-03. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national stan
10、d- ards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified t
11、o the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland
12、, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 2000. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national member
13、s. Ref. No. EN 10241 : 2000 E Page 2 EN 10241 : 2000 Contents Foreword 3 1 2 3 4 5 5.1 5.2 6 6.1 6.2 6.3 6.3.1 6.3.2 6.4 7 7.1 7.2 7.2.1 7.2.2 7.2.3 8 8.1 8.2 8.2.1 8.2.2 8.2.3 9 9.1 9.1.1 9.1.2 9.2 9.2.1 9.2.2 10 11 12 Scope 4 Normative references 4 Terms and definitions 4 Designation . 5 Informati
14、on to be supplied by the purchaser 5 Mandatory information 5 Options 5 Technical requirements . 6 Surface condition . 6 Material 6 Chemical composition . 6 Mechanical properties . 6 Th reads . 7 Dimensions and tolerances 7 Dimensions . 7 Tolerances 7 Tolerances on length of fitting . 7 Fitting manuf
15、acture . 6 Tolerances on diameters . 8 Tolerance on threads . 8 Protection . 8 General 8 Zinc protective coating 8 Electro zinc plating 8 Zinc flake . 8 Inspection and testing . 8 Hot dip zinc galvanizing 8 Leaktightness test . 8 Hydrostatic test 8 Air test . 9 Inspection of threads . 9 Inspect ion
16、method . 9 Thread electro zinc plating . 9 Marking . 9 Packaging . 9 Inspection documents . 9 Annex A (informative) Thread designation and nominal size 31 Page 3 EN 10241 : 2000 Foreword This European Standard has been prepared by Technical Committee ECISSTTC 29 “Steel tubes and fittings for steel t
17、ubes“, the secretariat 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 October 2000, and conflicting national standards shall be withdrawn at the latest by October 2000. A
18、ccording to the CENKENELEC 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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portu
19、gal, Spain, Sweden, Switzerland and the United Kingdom. Page 4 EN 10241 : 2000 1 Scope This European standard specifies requirements for threaded fittings of nominal sizes from DN 6 to DN 150 inclusive, made out of welded or seamless steel tubes, forging and rolled bars. It is applicable to those th
20、readed steel pipe fittings that are used in the transportation and distribution of liquid or gas. 2 Normative references This European standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text a
21、nd 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 incorporate in it by amendments or revision. For undated references, the latest edition of the publication referred to applies
22、(including amendments). EN 10204, Metallic products - Types of inspection documents. EN IS0 6708, Pipework components - Definition and selection of DN (nominal size) (IS0 6708: 1995) IS0 7-11, Pipe threads where pressure-tight joints are made on the threads - Part I: Dimensions, tolerances and desig
23、nation. IS0 7-21, Pipe threads where pressure-tight joints are made on the threads - Part 2: Verification by means of fimit gauges. IS0 228-1, Pe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation. IS0 228-2, Pipe threads where pressure-t
24、ight joints are not made on the threads - Pan 2: Vertfication by means of limit gauges. 3 Terms and definitions For the purposes of this Standard, the following terms and definitions apply : 3.1 nominal size (DN) DN : as defined in EN IS0 6708 NOTE only. The comparison between the thread size design
25、ation and the nominal size (DN) is given in table A.l for information 3.2 seamless fitting Fitting manufactured from seamless tube, forging or rolled bar 3.3 fabricated fitting Fitting manufactured either from a welded tube or where the welding forms part of the fabrication of the fitting 3.4 tubula
26、r Fitting manufactured from medium or heavy pipe as defined in table 6. These fittings are defined in tables 21 to 24 European standards are under development (series EN 10226). When published, they may be agreed at the time of enquiry andlor order. Page 5 EN 10241 : 2000 4 Designation The fitting i
27、n accordance with this European Standard shall be designated by the following in the sequence shown : 1) type of fitting (see tables 7 to 24) ; 2) reference to this European Standard (EN 10241) : 3) either nominal size (DN), or thread size. Fittings which have the same nominal sizes (DN) are designa
28、ted only with that DN (see example 1). EXAMPLE 1 : For an equal female elbow with DN 50 run, the designation will be : Elbow - EN 10241 - DN 50 Fitting which has differing nominal sizes shall be shown as in the sequence 1-2 where 1 refers to the run and 2 refers to the branch or the reduction (see e
29、xamples 2 and 3). EXAMPLE 2 : For a reducing tee with DN 50 run and DN 25 branch, the designation will be Reducing tee - EN 10241 - DN 50 X DN 25 EXAMPLE 3 : For a bush with DN 40 and a reduction DN 25, the designation will be : Bush - EN 10241 - DN 40 X DN 25 5 Information to be supplied by the pur
30、chaser 5.1 Mandatory information The following information shall be supplied by the purchaser, at the time of enquiry andlor order 1) the quantity to be delivered : 2) the designation (see clause 4). 5.2 Options A number of options are specified in this European Standard and they are listed below. I
31、n the event that the purchaser does not indicate a wish to implement any of these options at the time of enquiry and/or order, the fittings shall be supplied in accordance with the basic specification. 1) taper internal thread type Rc conforming to IS0 7-1 : 2) parallel external thread type GA or GB
32、 conforming to IS0 228-1 ; 3) parallel internal thread type G conforming to IS0 228-1. 4) zinc protective coating (see 8.2) ; 5) leaktightness test (see 9.1) ; Page 6 EN 10241 : 2000 C max. YO 6) special packaging (see clause 11) ; 7) inspection document 2.1 (see clause 12) ; S max. P max. YO % 6 Te
33、chnical requirements C max. Oh 0,25 6.1 Fitting manufacture Dimensions and tolerances of differing types of fittings shall be as given in tables 5 to 24. Mn max. P max. S max. % YO YO 1,40 0,045 0,045 6.2 Surface condition The fitting shall have a smooth surface consistent with the manufacturing pro
34、cess and be free from burrs : surface marks may be ground. Unless otherwise specified in the tables 11 and 12, the female thread entrance shall be chamfered. Repairs by welding, other than the weld seam, are forbidden. Tensile strength min. N/mm2 6.3 Material Elongation min. YO 6.3.1 Chemical compos
35、ition The fitting shall be manufactured from steel having the chemical composition indicated in tables 1 and 2. I 0,25 I 0,35 I 0,09 I 6.3.2 Mechanical properties The fitting shall be manufactured from base material having the mechanical properties indicated in tables 3 and 4. These properties shall
36、 not be subject to verification on the fitting. Table 3 - Mechanical properties of seamless steel fittings I 320 I 20 I Page 7 EN 10241 : 2000 Tensile strength min. N/mm2 Table 4 - Mechanical properties of fabricated fittings and tubulars Yieds strength min. Elongation min. N/mm2 Yo Up to and includ
37、ing 25 Dimension +1,5 O Tolerance I I 320 195 20 I Over 25 Over 40 Over 65 to 40 to 65 to 75 + 3,O + 4,5 + 6,O O O O 6.4 Threads Internal threads shall be parallel and external threads shall be taper conforming to IS0 7-1, except for certain tubulars in tables 21, 23 and 24 or when the purchaser spe
38、cifies other types of thread (see 5.2, option 1 or 2 or 3), in this case the type of thread shall be identified. 7 Dimensions and tolerances 7.1 Dimensions Fittings shall have the appropriate dimensions given in tables 6 to 24. 7.2 Tolerances When tolerances are not specified in tables 5 to 24, dime
39、nsions are nominal and subjected to manufacturing tolerances. 7.2.1 Tolerances on length of fitting The tolerances on the overall length of the fitting, centre to face, centre to centre and back to face dimensions are given in table 5. Table 5 - Tolerances Dimensions in mm to 150 Page 8 EN 10241 : 2
40、000 7.2.2 Tolerances on diameters Unless otherwise stated in tables, the tolerances on outside diameters are given in table 6. 7.2.3 Tolerance on threads The axis of screw threads shall be accurate within i 0,5“ of the specified angle for fittings described in tables 7 to 23 and I 13“ for fittings d
41、escribed in table 24. 8 Protection 8.1 General The fitting shall be supplied black and shall be protected by a protective coating, e.g : light oil. 8.2 Zinc protective coating When a zinc protective coating is specified by the purchaser (see 5.2, option 4), one of the methods given in 8.2.1 to 8.2.3
42、 shall be applied, at the discretion of the manufacturer. 8.2.1 Hot dip zinc galvanizing Galvanizing of fittings shall be performed before the thread cutting operation and shall be by means of the hot dip method. The minimum average coating thickness shall be 55 pm on the outside of the fitting, wit
43、h a local average of 45 pm on 100 mm2. The hot dip zinc bath shall contain not less than 983 % pure zinc. 8.2.2 Electro zinc plating Electro zinc plating shall be performed on the finished black fitting. The minimum coating thickness on the outside of the fitting shall be 8 pm. 8.2.3 Zinc flake Zinc
44、 flake non-electrolically applied cured coating shall be performed on the finished black fitting. The coating thickness on the outside of the fitting shall be between 5 pm to 10 pm. NOTE The zinc coating thickness can be checked with an electronic andlor magnetic appliance. 9 Inspection and testing
45、9.1 Leaktightness test Each fitting, after being threaded, shall be capable of withstanding, without any signs of leakage, the hydrostatic or air test as specified in clauses 9.1.1 and 9.1.2. This test shall only be carried out when specified by the purchaser at the time of enquiry and/or order (see
46、 5.2, option 5). 9.1.1 Hydrostatic test Hydrostatic test, using water or light oil as a medium. 9.1.1.1 Tubulars These shall be tested to a minimum internal pressure of 50 bar. Page 9 EN 10241 : 2000 9.1.1.2 Fabricated fittings These shall be tested to a minimum internal pressure of 75 bar. 9.1.1.3
47、Seamless fittings These shall be tested to a minimum internal pressure of 150 bar. 9.1.2 Air test Air test, with the fitting fully immersed in water or light oil as a medium. Tubulars, fabricated fittings and seamless fittings shall be tested to a minimum internal air pressure of 7 bar. 9.2 Inspecti
48、on of threads 9.2.1 Inspection method Threads manufactured in accordance with IS0 7-1 shall be verified in accordance with IS0 7-2. Threads manufactured in accordance with IS0 228-1 shall be verified in accordance with IS0 228-2. 9.2.2 Thread electro zinc plating Where fittings have been electro zin
49、c plating, this can result in the thread being covered in uneven particles of zinc ; these particles may be removed with a plug or a brush. 10 Marking The manufacturers brand or logo shall, depending on the size of fittings, either be applied on a label attached on the packaging or be marked indelibly on each fitting. 11 Packaging Unless special packaging is specified by the purchaser at the time of enquiry and/or order (see 5.2, option 6), fittings shall be supplied, either singly or in sacks or bags. 12 Inspection documents Fittings shall be delivered without an inspection
