1、Threaded pipe fitting in malleable cast iron English version of DIN EN 10242 ICs 23.040.40 Descriptors: Threaded fittings, malleable cast iron, pipe fittings. Gewindefittings aus Tempergu DIN - EN 10242 Supersedes DIN 2950, April 1983 edition. European Standard EN 10242:1994 has the status of a DIN
2、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 Normenausschu Rohre, Rohrverbindungen und Rohrleitungen (Pipes, Pipe Joints and Pipelines Standards Committee). It should
3、 be noted that malleable cast iron fittings are now to be identified by design symbols (cf. table 2). The DIN Standards corresponding to the European and International Standards referred to in clause 2 and in annex E of the EN are as follows: EN/ISO Standard DIN Standard EN 10204 DIN 50049 EN 29 001
4、 EN 29 002 IS0 228-1 DIN EN IS0 9001 DIN EN IS0 9002 DIN 6630 and DIN IS0 228-1 IS0 7-1 DIN 2999-1 IS0 228-2 DIN IS0 228-2 IS0 1460 DIN 50988-1 IS0 2859 IS0 6708 DIN IS0 2859-O*), DIN IS0 2859-1, DIN IS0 2859-2, and DIN IS0 2859-3*) DIN 2402 and DIN EN 26708*) Amendments The following amendments hav
5、e been made to DIN 2950, April 1983 edition. a) The range of fitting sizes covered has been extended. b) Maximum values of width across flats, s, are no longer included. c) For ordering purposes, fittings are to be identified by design symbols (A to D), which represent material grade and thread type
6、. d) Material grades with mechanical properties adequate to meet less stringent requirements (e.g. corresponding to design symbol B) have been specified. e) Taper internal thread type Rc, identified by design symbols C and D, has been included (to meet British demands). f) The specifications for tes
7、ting have been completely revised. Previous editions DIN 2950 to DIN 2973: 1932-08; DIN 2952, DIN 2954, DIN 2956, DIN 2971 and DIN 2972: 1932x-08; DIN 2950: 1962-06, 1983-04. *) At present at the stage of draft. Continued overleaf. EN comprises 44 pages. ith Verlag GmbH, Berlin, has the exclusive ri
8、ght of sale for German Standards (DIN-Normen). DIN EN 10242 Enal. Price group 1 - -. SalesNo. 1116 09.95 Page 2 DIN EN 10242 Standard referred to (and not included in Normative references) DIN 2402 DIN 2999-1 DIN 50 049 DIN 50988-1 DIN EN 1562 DIN EN 26 708 DIN EN IS0 9001 DIN EN IS0 9002 Pipework;
9、grading of nominal sizes Pipe threads for tubes and fittings; parallel internal threads and taper external threads; thread dimensions Inspection documents for the delivery of metallic products Coating thickness measurement; determination of the mass per unit area of zinc and tin coatings on ferrous
10、materials by the dissolution of the coating material; mass analytical method Foundry technology; malleable cast iron*) Pipe components; definition of nominal size (DNY) Quality systems; model for quality assurance in design/development, production, installation and serv- icing Quality systems; model
11、 for quality assurance in production and installation International Patent Classification C 22 C 037/00 G O1 B 003/00 G O1 N 033/20 *) At present at the stage of draft. EUROPEAN STANDARD NORME EUROPENNE EUROPAISCHE NORM EN 10242 November 1994 ICs 23.040.40 Descriptors: Threaded fittings, malleable c
12、ast iron, pipe fittings. English version Threaded pipe fitting in malleable cast iron Raccords de tuyauterie filets en fonte mallable Gewindefittings aus Tempergu This European Standard was approved by CEN on 1994-1 1-1 O. GEN members are bound to comply with the CENBENELEC Internal Regulations whic
13、h stipu- late 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 standards may be obtained on application to the Central Secretariat or to any CEN member. This European St
14、andard exists 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 to the Central Secretariat has the same status as the official versions. CEN members are the national st
15、andards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung C
16、entral Secretariat: rue de Stassart 36, 8-1050 Brussels O 1994. Copyright reserved to all CEN members. Ref. No. EN 10242:1994 E Page 2 EN 10242:1994 Contents Page Foreword 2 1 Scope 3 2 Normative references . 3 3 Types of fitting. 4 4 Terminology . 7 5 Materials 9 6 Design 11 7 Dimensions and tolera
17、nces 12 8 Threads 14 9 Manufacture . 15 10 Required characteristics . 15 11 Testing and inspection . 16 12 Quality assurance system 18 Page 13 Designation of fittings . 19 14 Marking 20 Tables of dimensionally standardized fitting types and sizes (tables 8 to 27) . 22 Annex A (normative) Malleable c
18、ast iron fittings threaded to IS0 7-1 but having internal threadstype Rc . 42 Annex B (informative) Assessment of conformity . 42 Annex C (informative) Relationship with the essential requirements of the Construction Products Annex D (informative) Relationship between fitting Directive (89/106/EEC)
19、43 size and nominal size (DN) 44 Annex E (informative) Bibliography . 44 Foreword This European Standard has been prepared by ECISSTTC 29 Steel pipes and fittings for steel pipes, the Secretariat of which is held by UNSIDER. This European Standard shall be given the status of a national standard, ei
20、ther by publication of an identical text or by endorsement, and conflicting national standards withdrawn, by May 1995 at the latest. In accordance with the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, Fran
21、ce, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherland, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 3 EN 10242:1994 1 scope This standard specifies the requirements for the design and performance of threaded pipe fittings in malleable cast iron. ese fittings a
22、re for general purposes for the transmission of fluids and yliliols GI I G1/4S0 I G4 4I4S0 I I G AXig ;uxp crids Table 17 Table 18 Table 17 Table 18 E2 Table 14 1 Table 16 Table 17 I Page 6 EN 10242:1994 Ti m Tablc 24 SynlbOlS T8 T9 TI i id size Same ddinition as for fitting size (see 4.4). 4.6 imnu
23、nal sizc; DN For definition see IS0 6708. NOTE 1: Nominal size is designated by the lettm DN followed by the appmpriate number. NOTE 2: lie relationship between fitting si= and nomllial size (DN) is given LI illinex D for guidance only. NUE 3: Nominal size (DN) should not be used for the designation
24、 of fitting size. 4.7 ieinfoirenient Additional material on the outside diameter of an intemaily threaded fitting in the form of a band or bead. Page 8 EN 10242:1994 Band Bead Figurn 1: Foms of iieinforccmns 4.8 i*ib hui and axially alignai additional mataiai on the outside or inside of a fitting fo
25、r assistance iii assembly or nanufacturhg. 4.9 outlct Intcmlly or ckqcmally threaded end of a fitting, which connects with a tube, fitting or other coiiiponait, whicli is ihrcaded in accordance with IS0 7-1. 4.1 o 1un Two principal axially aligied outlets of a tee or cross. 4.1 1 b1,i.JiiCli Sidc ou
26、tlct(s) of a tce, pilchcr tee, or cross. 4.12 Cli;iiiifCi. Rcmoval of ri conical portion at ihc enrance of a thread to assist assembly and preverit dinagc to the start of the thrcad. Distance ktwcen the two lei faces of axially aligned outlets of a fitting. 4.14 fc-to-ccntrc dimension Distruice betw
27、ecn the face of an outlet and the centmi axis of an angularly disposed outlet. Page 9 EN 10242:1994 4.15 laying length Average distance fiom the assembled pipe end to the axis of the fitting, or beiween the ends of two asscmbled pipes. (See 7.2). 5 Materials 5.1 Materid of tlie fitting 51.1 Mdieabie
28、 mt iron lie niateriai used shall be malleable cast iron conforming to prEN 19 W 2201. “e grade of material used shall be selected hm the following grades depending on the design symbol cliosen (see 6.1): Grades W400-05 or W350-04 for fitting in whiteheart malleable iron Gmdes B350-10 or B300-06 for
29、 fitting in blackheart malleable iron. 5.1.2 Other feiivu materials Nottvitiisiriiidiiig this requirement, any other ferrous materials which give mechanid propertics rit last cquivalent to those malleable cast irons specified above will be allowed for siixight fiitiiigs not larger than ?e, but exclu
30、ding unions. Page 1 O EN 10242:1994 5.2 Hot dip zinc coating Wiim a protection by zinc coating is required, the zinc Coating shall be applied by the hot dip process and shall meet the following requirements. NOTE: For fittings supplied in oher fmus materials (see 5.1.2) altemative zinc coating may b
31、e provided by agreement with the purchaser. 5.2. Chenticai composition of the zinc coding nie content by mass of the aCC0mPanying elements in the finished zinc Coating shall not exceed the following maximum values: aluminium antimony arsenic bismuth cadmium copper lead tin 0,i % 0,Ol Yo 402 Yo 0,Ol
32、% 0,Ol % 0,i % 0,l Yo 1,6 Yi, in individual cases 1,8 % 5.2.2 Catii7g nias per sMme uni! flic surkc relatai mass of the zinc coating shall be not less than 500 dm*, as an average of 5 fittings. Illis corresponds to a medium layer thickness of 70 pn. It shall be not less than 450 j$n2 (63 pin) when i
33、t is mad on an individual sample. flic indium laycr tliickness Z of the zinc coating in pm may be caiculated by using the approximation fornida diere m, is the surfacc related inas of die zinc coating in g/mt. 5.2.3 Swjimc condition of the zinc coding iie zinc coating on the intemai surfce of the fi
34、tting shaii be continuous, with the exception of inachiiied black suTfaces. In the special case of larger matalal CCOSS-SBdiom the iron-zinc alloy phases may grow through. The intemal zinc coating shall be ie!e fbm zinc blisters, zinc buns, non-nxtallic remainders. Page 11 EN 10242:1994 Design symbo
35、l A B 5.3 Despotch conditiom of finished fittin nie surfaces of the fittings shall be he of aromatic hydncarbons. -type Material grade extemai internal R RP W400-05 or B350-IO R RP W35W or B300-06 6 Dcsign 6.1 Fittings siiall be identified by design symbols according to the selected material (see 5.
36、1.1) and the clioice of thread (see 8.1.1) as given in table 2. NOTE: See also annex A. Tabie 2: Design symbols 6.3 nie typa aid sizes dimensionally standardized are shown in tables 8 to 26. 6.4 Fittings shall be reidod at the internally haded ends by a and or bead, except where they arc polygonal i
37、n shape to allow for spanner flats, or where fittings have side outlets (type 251 and Za2). 6.5 Manulacturers may incorporate ribs at their disaetion. Ribs should not projed higher than the band or bead. 6.6 Backnuts may be plain or recessed and one face may be machined. 6.7 Tabla 25 and 26 show two
38、 typical types of seats of Wons and their designation. tha types of scat desigi and seat matenal shall be considered as complying with this standard provided the dimensions in tables 25 and 26 and other requirefnents of this standard are observed. Such unions do not have a specific designation. Page
39、 12 EN 10242:1994 7 Dinxnsiois and tolerances 7.1 Fittings slnll have the appropriate dimensions given in tabla 8 to 26. Where maxhnum or minimum dimensions are not spifie, the tolerances for -*face and dimensions shall be as given in table 3. NOTE 1: Fitting sim shown in brackets are optional sim a
40、nd wbich may have a limited availability. NOTE 2: The face-to-face and face-t+cenuding this shall be done by adequate visual inspection. 11.6 Acceptance tests for higher penormances 1.6.1 If tlie customer requires acceptance tests for higher oxmanus, these shall be stipulated and ar at tlie enquiry
41、or order stage. The purchaser shall bear the co6ts of accepbnce tests. Acceptance tests should be carried out with suitable equipment and the manpower of the iiianu facturer. 11.6.2 ffydmstcdic pmsm tests Acceptan= hydrostatic pressure tests for working pressures above 25 bar shall be canid out by a
42、greement at the order stage. The test pressure shall not exceed the limit beyond which permanent defonnatioiis and clmges to the thread dimensions would occur. 11.7 Analysis of aiondc hydmcahois flic verification of this requireinent (see 5.3) shall be pesforned by means of ssumacc system MUnufackms
43、 of fittings to this standard shall establish and maintain a documented quality system conforming to EN 29001 or EN 29002 and certified by a third party certification body Opcrating to EN 45012, i1s a means of ensuring that the fittings conform to the specified requirementS. Page 19 EN 10242:1994 13
44、 Designation of fittings 13.1 Denients of ie desigdon nie fittings complying with this standard shall be designated as follows: a) die type of fitting, see table 1; b) EN 10242; c) the syinol, see table 1; d) itting size, see 13.2 and tables 8 to 26; e) surface condition whether black (symbol Fe) or
45、 hot dip zinc coated (symbol 2x1); I) dcsign symbol, see 6.1. 13.2 Addilionai notes on designation of size Qual fittings, where all outlets are of the same six, are referred to by that one siz, kve of the iiunibcr of outlets. Uiicqual ittiiigs Iiriving two outlets are specified by their outlets h de
46、creasing order (large outlet- siimll oullct). Unequal fittings having more than two outlets but not reducing on the run are specified as follows. a) TLXS l31 and El with qual outlets on the run and an baxasingor reducing outlet on the brrinch rire specified by stating the size of the m followed by t
47、he size of the branch, for exatiiplc, 1 x 314 (see tables Il and 15). b) liviii clbows reducing E2. The size of the large outlet is specified followed by the size of the two siimller outlets, for example,l Yi x 1 % (see table 16). c) Reducing crosses CI. The size of the largest run is specified foll
48、owed by the size of the Lwo siiialler (but qual) branches, for example, 1 /r x 1 (see table 13). Uiiequal fittiiigs having more than two outlets and reducing on the run or with three diffmt outlets inay be specilied by either method “a“ or method “b“ according to national practice as shown in tipre
49、5. NOTE It is recommended that method “b“ should be phased out by the year ZOOO. From this time all fitting should be designated using method a“. Page 20 EN 10242:1994 3 /p2 1 3 1 1 (2) Method “a“ Method “b“ Figure 5: Sequence of specifying outlets when the above mentioned abbreviated method does not apply 13.3 Exaiiijllc of csigmtion i) Equril icinalc elbow size 2, black finish, design symbol A Elbow EN 1 0242-A 1 -2-Fe-A i) Rctlucing tcc with run 2 and branch 1, hot dip zinc coated, design symbol B la EN 10242-B 1 -21-Zn-B i
