1、 DEUTSCHE NORMJune 2002DIN 2875 ICS 23.040.60 Supersedes DIN 2875:1993-05 Flanged steel pipes and fittings with hard or soft rubber linings Technical delivery conditions Flansch-Rohre und Flansch-Formstcke aus Stahl mit Auskleidung aus Hart- oder Weichgummi Technische Lieferbedingungen Document comp
2、rises 10 pagesTranslation by DIN-Sprachendienst. In case of doubt, the German-language original should be consulted as the authoritative text. No part of this translation may be reproduced without prior permission of DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, G
3、ermany, has the exclusive right of sale for German Standards (DIN-Normen). English price group 7 www.din.de www.beuth.de !,k|“09.06 9728994DIN 2875:2002-06 2 Contents Page Foreword. 2 1 Scope . 3 2 Normative references . 3 3 Materials for steel components. 5 4 Order details 6 5 Requirements 6 5.1 Li
4、ning . 6 5.2 Manufacturing . 7 5.3 Lining appearance 8 5.4 Dimensions and tolerances . 8 5.5 Immunity to electrostatic discharge . 9 6 Testing . 9 6.1 General. 9 6.2 Test site . 9 6.3 Testing semi-finished products 9 6.4 Testing finished products 9 7 Packaging, storage and transport. 10 8 Marking 10
5、 Passages marked include specifications to be agreed upon when ordering; those marked include speci-fications which may be agreed upon when ordering (see clause 4). Foreword This standard has been prepared by the Normenausschuss Rohrleitungen und Dampfkesselanlagen (Pipe-lines and Boilers Standards
6、Committee). Amendments This standard differs from the May 1993 edition in that: a) steel grade EN-GJS-400-18-LT has been included for the first time; b) the nomenclature in table 1 has been updated, and material numbers C22.3 and C22.8 have been added; c) the standard has been editorially revised an
7、d references have been updated. Previous editions DIN 2875: 1985-09, 1993-05 DIN 2875:2002-06 3 1 Scope This standard specifies technical delivery conditions for flanged steel pipes and fittings as in DIN 2848, with vulcanized linings made from natural or synthetic rubber, applied either in a factor
8、y or on site. The standard may be used analogously for fittings not listed in DIN 2848. The DIN EN 13480 series of standards shall apply for fittings that fall under Directive 97/23/EC. Other applications may require additional specifications to be observed. 2 Normative references This standard inco
9、rporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this stand
10、ard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to (including any amendments) applies. DIN 1626 and DIN 1629*)DIN 2528, Steel flanges Technical delivery conditions DIN 2848, Lined flanged steel pipes and flanged steel o
11、r cast iron fittings rated for pressures of 10 bar (PN 10), 25 bar (PN25) and 40 bar (PN40) DIN 7716, Requirements for storage, cleaning and maintenance of rubber products DIN 17175 and DIN 17177*)DIN 28051, Design of metallic components designed to receive organic coatings and linings for use in pr
12、ocess engineering DIN 28053, Organic coatings and linings on metal components used in process engineering Requirements for metallic substrates DIN 28055-1, Organic linings for application to metallic components for use in process engineering General requirements DIN 28055-2, Organic linings for appl
13、ication to metallic components for use in process engineering Func-tional requirements and testing DIN 53505, Shore A and D hardness testing of rubber and plastics DIN EN 1081, Resilient floor coverings Determination of the electrical resistance DIN EN 1563, Founding Spheroidal graphite cast iron (i
14、ncludes Amendment A1:2002) DIN EN 1708-1, Welding Basic weld joint details in steel Part 1: Pressurized components DIN EN 10025 series, Hot rolled products of structural steels Technical delivery conditions *) Translators note. Standards DIN 1626 and DIN 1629 have been superseded by DIN EN 10208-1,
15、DIN EN 10216-1, DIN EN 10217-1, DIN EN 10224, DIN EN 10296-1 and DIN EN 10297-1. *) Translators note. Standards DIN 17175 and DIN 17177 have been superseded by DIN EN 10216-2 and DIN EN 10217-2, respectively. DIN 2875:2002-06 4 DIN EN 10028-1, Flat products made from steel for pressure purposes Part
16、 1: General requirements (in-cludes Amendment A1:2002) DIN EN 10028-2, Flat products made from steel for pressure purposes Part 2: Unalloyed and alloy steels with elevated temperature properties DIN EN 10204, Metallic products Types of inspection documents DIN EN 10208-1, Steel pipes for pipe lines
17、for combustible fluids Technical delivery conditions Part 1: Pipes of requirement class A DIN EN 10216-1, Seamless steel tubes for pressure purposes Technical delivery conditions Part 1: Non-alloy steel tubes with specified room temperature properties DIN EN 10216-2, Seamless steel tubes for pressur
18、e purposes Technical delivery conditions Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties DIN EN 10217-1, Welded steel tubes for pressure purposes Technical delivery conditions Part 1: Non-alloy steel tubes with specified room temperature properties DIN EN 10217
19、-2, Welded steel tubes for pressure purposes Technical delivery conditions Part 2: Elec-tric welded non-alloy and alloy steel tubes with specified elevated temperature properties DIN EN 10224, Non-alloy steel tubes and fittings for the conveyance of water and other aqueous liquids Technical delivery
20、 conditions DIN EN 10253-2, Butt-welding pipe fittings Part 2: Wrought carbon and ferritic alloy steel with specific in-spection requirements*)DIN EN 10296-1, Welded circular steel tubes for mechanical and general engineering purposes Technical delivery conditions Part 1: Non-alloy and alloy steel t
21、ubes DIN EN 10297-1, Seamless circular steel tubes for mechanical and general engineering purposes Techni-cal delivery conditions Part 1: Non-alloy and alloy steel tubes DIN EN 12351, Industrial valves Protective caps for valves with flanged connections DIN EN 13480-1, Metallic industrial piping Par
22、t 1: General DIN EN 13480-2, Metallic industrial piping Part 2: Materials DIN EN 13480-3, Metallic industrial piping Part 3: Design and calculation DIN EN 13480-4, Metallic industrial piping Part 4: Fabrication and installation DIN EN 13480-5, Metallic industrial piping Part 5: Inspection and testin
23、g DIN EN 13480-6, Metallic industrial piping Part 6: Additional requirements for buried piping DIN EN ISO 12944-4, Paints and varnishes Corrosion protection of steel structures by protective paint sys-tems Part 4: Types of surface and surface preparation (ISO 12944-4:1998) DIN EN ISO 12944-5, Paints
24、 and varnishes Corrosion protection of steel structures by protective paint sys-tems Part 5: Protective paint systems (ISO 12944-5:1998) IEC 60093, Methods of test for volume resistivity and surface resistivity of solid electrical insulating materials *)At present at the stage of draft. DIN 2875:200
25、2-06 5 IEC 60167, Methods of test for the determination of the insulation resistance of solid materials NF A 49-111, Tubes en acier Tubes sans soudure extrmits lisses du commerce pour usages gnraux moyenne pression (Steel tubes Plain end seamless tubes of commercial quality for general purposes rate
26、d for medium pressures)*)NF A 49-112, Tubes en acier Tubes sans soudure extrmits lisses lamins chaud avec caractristiques garanties temprature ambiante et conditions particulires de livraison Dimensions Conditions techniques de livraison (Steel tubes Plain end seamless hot rolled tubes with specifie
27、d room temperature properties and subject to special delivery conditions Dimensions Technical delivery conditions*)NF A 49-142, Tubes en acier Tubes souds longitudinalement par pression extrmits lisses finis chaud Diamtres 13,5 168,3 mm avec caractristiques garanties temprature ambiante et condition
28、s particulires de livraison Dimensions Conditions techniques de livraison (Steel tubes Plain end longitudinally pressure welded and hot finished tubes of diameters from 13,5 mm to 168,3 mm with specified room temperature properties and subject to special requirements Dimensions Technical delivery co
29、nditions)*)NF E 29-204, Tuyauteries industrielles Brides et collets forgs en aciers Matriaux Caractristiques mcaniques Fabrication Essais (Industrial pipeworks Forged steel flanges and collars Materials Mechanical properties Manufacture Testing)1)Directive 97/23/EC of the European Parliament and of
30、the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment, EC Official Journal, 1997, No. L 265, p. 110 3 Materials for steel components Materials shall be selected by the customer or manufacturer from table 1. Table 1 Materials for steel componen
31、ts Equivalent French steel grade Components Material (grade) Material no. Product form Technical delivery conditions as in Name Technical specification Seamless DIN 1629aTU 220 A NF A 49-112 St 37.0 1.0254 Welded DIN 1626aTS 220 A NF A 49-142 St 35.8 I 1.0305 Seamless DIN 17175bTU 250 B NF A 49-111
32、Pipes St 37.8 I 1.0315 Welded DIN 17177b P235 Elbows, T-pieces, reducers P265 E DIN EN 10253-2 *) Document withdrawn. 1) Obtainable from Beuth Verlag GmbH, Burggrafenstr. 6, 10787 Berlin, Germany. DIN 2875:2002-06 6 Table 1 (concluded) Equivalent French steel grade Components Material (grade) Materi
33、al no. Product form Technical delivery conditions as in Name Technical specification S235JRG2 Sheet metal DIN EN 10025 series RSt 37-2 1.0038 Forging DIN 2528 A 42 NF E 29-204 DIN 1626aPU 220 A NF A 49-112 St 37.0 1.0254 Pipe DIN 1629aTS 220 A NF A 49-142 P265GH 1.0425 Sheet metal DIN EN 10028-1 and
34、 DIN EN 10028-2 C 22.3 1.0427 BF 112 Weld-neck collars and flanges, weld-on plate collars and flanges, reducers, spacers, blank flanges and instrument nozzles C 22.8 1.0460 Forging DIN 2528 BF 42 N NF E 29-204 S235JRG2 1.0038 S355J2G3 1.0570 Sheet metal DIN EN 10025 series C 22.3 1.0427 BF 112 C 22.
35、8 1.0460 Forging DIN 2528 BF 42N NF E 29-204 Adjustable flanges EN-GJS-400-18-LT 0.7043 Casting DIN EN 1563 aSee page 3, footnote *). bSee page 3, footnote *). 4 Order details Passages marked include specifications to be agreed upon when ordering; those marked include speci-fications which may be ag
36、reed upon when ordering. The customer shall decide on the details to be given in the order. Order details shall include reference to the dimensional standard, number of items to be supplied, type of inspection document as in DIN EN 10204, and any additional relevant standards or codes of practice. A
37、dditional details may be agreed upon if so marked. 5 Requirements 5.1 Lining 5.1.1 General It may be assumed that the application of a lining will not change the properties of the semi-finished product, the chemical composition and mechanical properties of which shall conform to the relevant standar
38、ds listed in table 1. The lining material shall be selected for the chemical, thermal and mechanical stresses and other conditions of service. DIN 2875:2002-06 7 5.1.2 Soft rubber Unvulcanized semi-finished products shall be used for soft rubber linings, while prevulcanized or completely vulcanized
39、semi-finished products shall only be used with the consent of the customer. The lining thickness shall normally be 4 mm, but other thicknesses for specific applications may be agreed. The following types of rubber are in frequent use: NR Isoprene rubber, natural (natural rubber) CR Chloroprene rubbe
40、r NBR Acrylonitrile-butadiene rubber CSM Chlorosufonated polyethylene IIR Isobutene-isoprene rubber CIIR Chloro-isobutene-isoprene rubber BIIR Bromo-isobutene-isoprene rubber SBR Styrene-butadiene rubber 5.1.3 Hard rubber Semi-finished products for hard rubber linings shall not be vulcanized and sha
41、ll be free of imperfections. The minimum lining thickness shall normally be 3 mm, and the following rubber types are frequently used: NR Isoprene rubber, natural (natural rubber) SBR Styrene-butadiene rubber NBR Acrylonitrile-butadiene rubber 5.1.4 Soft rubber linings with hard rubber sealing faces
42、One of the materials listed in subclause 5.1.2 shall be used for lining steel components, with the exception of the flange facings, for which a material listed in subclause 5.1.3 shall be used. 5.1.5 Hardness When confirming an order, the manufacturer shall give the hardness of soft rubber in Shore
43、A units, and that of hard rubber in Shore D units, as in DIN 53505. The permitted deviation from the agreed hardness shall be 5 Shore A or D units. 5.1.6 Other properties Other properties required of the lining (e.g. biocompatibility, radiation resistance, decontaminability) shall be the subject of
44、agreement. 5.2 Manufacturing 5.2.1 General Production sites shall be suitably equipped and staffed for manufacturing, inspecting and testing as required. DIN 2875:2002-06 8 5.2.2 Steel components 5.2.2.1 General Steel components shall be designed to comply with DIN 28051. 5.2.2.2 Welding Welding sha
45、ll be carried out so as to produce full-penetration welds, in compliance with the requirements of class A4 as in table 1 of DIN 28053:1988-11, and with DIN EN 1708-1. Welds shall be checked for any imper-fections. If intended for use under internal pressure, components shall be manufactured so that
46、welds are ca-pable of accommodating stresses equal to least 85 % of the maximum design stress. Local dressing of welds is permitted, and the customer may demand one-off proof of the suitability of the dressing method (cf. penultimate paragraph of this subclause). The manufacturer shall have the equi
47、pment and personnel to enable welding to be satisfactorily carried out, tested and inspected. The customer may demand one-off proof that the above requirements have been met. Details, particularly with regard to the testing agency, shall be subject to agreement. Such confirmation shall only apply fo
48、r the steel grades, dimensions, welding procedures and consumables it specifically mentions. The scope of non-destructive testing of circumferential welds is subject to agreement. 5.2.2.3 External protection Surfaces to be externally protected shall be prepared by blast-cleaning to standard preparat
49、ion grade Sa 2 as in DIN EN ISO 12944-4. Other methods of surface preparation or requirements of finishes shall be subject to agreement. As external protection, the component shall be given a priming coat as in DIN EN ISO 12944-5, with the paint system used being at the manufacturers discretion. Any other type of external protection shall be subject to
