1、 DEUTSCHE NORMJune 2002DIN 2874 ICS 23.040.60 Supersedes DIN 2874:1993-05 Flanged steel pipes and flanged steel or cast iron pipes and fittings with PTFE or PFA linings Technical delivery conditions Flansch-Rohre aus Stahl und Flansch-Formstcke aus Stahl und Gusseisen mit Auskleidung aus PTFE oder P
2、FA Technische Lieferbedingungen Document comprises 13 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
3、., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Normen). English price group 8 www.din.de www.beuth.de !,k|“09.06 9728992DIN 2874:2002-06 2 Contents Page Foreword. 2 1 Scope . 3 2 Normative references . 3 3 Requirements 6 3.1 Materials 6
4、 3.2 Manufacture. 8 3.3 Dimensions and tolerances . 10 3.4 Lining appearance 10 3.5 Resistance to vacuum 10 3.6 Leaktightness 10 3.7 Immunity to electrostatic discharge .10 4 Order details 10 5 Testing . 11 5.1 General. 11 5.2 Test site . 11 5.3 Testing semi-finished products 11 5.4 Testing the lini
5、ng 11 5.5 Testing finished products 11 6 Packaging, storage and transport. 13 7 Marking 13 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 t
6、he Normenausschuss Rohrleitungen und Dampfkesselanlagen (Pipe-lines and Boilers Standards Committee). Amendments This standard differs from the May 1993 edition in that: a) steel grades X6CrNiTi18-10 (material no. 1.4541), X6CrNiMoTi17-12-2 (material no. 1.4571) and GP240GH (material no. 1.0619) hav
7、e been included for the first time; b) the nomenclature in table 1 has been updated; c) the standard has been editorially revised and references have been updated. Previous editions DIN 2874: 1985-09, 1993-05 DIN 2874:2002-06 3 1 Scope This standard specifies technical delivery conditions for flange
8、d steel pipes and flanged steel or cast iron fit-tings as in DIN 2848, lined with polytetrafluoroethylene (PTFE) or perfluoroalkoxy (PFA). It may be used analogously for fittings not covered by DIN 2848. The DIN EN 13480 series of standards shall apply for fittings that fall under Directive 97/23/EC
9、. Other applica-tions may require additional specifications to be observed. 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications. These norma-tive references are cited at the appropriate places in the text, and the publications are list
10、ed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard 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 D
11、IN 1629*)DIN 2528, Steel flanges Technical delivery conditions DIN 2609, Steel butt-welding pipe fittings Technical delivery conditions DIN 2848, Lined flanged steel pipes and flanged steel or cast iron fittings rated for pressures of 10 bar (PN 10), 25 bar (PN25) and 40 bar (PN40) DIN 17175 and DIN
12、 17177*)DIN 17457, Welded circular austenitic stainless steel tubes subject to special requirements Technical de-livery conditions DIN 17458, Seamless circular austenitic stainless steel tubes subject to special requirements Technical delivery conditions DIN 28051, Design of metallic components desi
13、gned to receive organic coatings and linings for use in process 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
14、General requirements DIN 28055-2, Organic linings for application to metallic components for use in process engineering Func-tional requirements and testing DIN 53479, Determination of density of rubber and plastics DIN EN 1081, Resilient floor coverings Determination of the electrical resistance DI
15、N EN 1563, Founding Spheroidal graphite cast iron (includes Amendment A1:2002) *)Translators note. Standards DIN 1626 and DIN 1629 have been superseded by DIN EN 10208-1, 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
16、17177 have been superseded by DIN EN 10216-2 and DIN EN 10217-2, respectively. DIN 2874:2002-06 4 DIN EN 1708-1, Welding Basic weld joint details in steel Part 1: Pressurized components DIN EN 10025-1, Hot rolled products of structural steels Part 1: General technical delivery conditions DIN EN 1002
17、5-2, Hot rolled products of structural steels Part 2: Technical delivery conditions for non-alloy structural steels DIN EN 10025-3, Hot rolled products of structural steels Part 3: Technical delivery conditions for normal-ized/normalized rolled weldable fine grain structural steels DIN EN 10025-4, H
18、ot rolled products of structural steels Part 4: Technical delivery conditions for ther-momechanically rolled weldable fine grain structural steels DIN EN 10025-5, Hot rolled products of structural steels Part 5: Technical delivery conditions for non-alloy structural steels with improved atmospheric
19、corrosion resistance DIN EN 10025-6, Hot rolled products of structural steels Part 6: Technical delivery conditions for flat prod-ucts made of high yield strength structural steels in the quenched and tempered condition DIN EN 10028-1, Flat products made from steel for pressure purposes Part 1: Gene
20、ral 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, Technical delivery conditions for s
21、teel pipes for use with combustible fluids Part 1: Pipes of requirement class A DIN EN 10213-2, Technical delivery conditions for steel castings for pressure purposes Part 2: Steel grades for use at room temperature and elevated temperature DIN EN 10216-1, Seamless steel tubes for pressure purposes
22、Technical delivery conditions Part 1: Non-alloy steel tubes with specified room temperature properties DIN EN 10216-2, Seamless steel tubes for pressure purposes Technical delivery conditions Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties DIN EN 10217-1, Welde
23、d steel tubes for pressure purposes Technical delivery conditions Part 1: Non-alloy steel tubes with specified room temperature properties DIN EN 10217-2, Welded steel tubes for pressure purposes Technical delivery conditions Part 2: Elec-tric welded non-alloy and alloy steel tubes with specified el
24、evated temperature properties DIN EN 10222-5, Steel forgings for pressure purposes Part 5: Martensitic, austenitic and austenitic-ferritic stainless steels DIN EN 10224, Non-alloy steel tubes for the conveyance of aqueous liquids including water for human con-sumption Technical delivery conditions D
25、IN EN 10253-2, Butt-welding pipe fittings Part 2: Wrought carbon and ferritic alloy steel specific inspection 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 tubes *)At present a
26、t the stage of draft. DIN 2874:2002-06 5 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 134
27、80-1, Metallic industrial piping Part 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
28、piping Part 5: Inspection and testing DIN EN 13480-6, Metallic industrial piping Part 6: Additional requirements for buried piping DIN EN ISO 6721-1, Plastics Determination of dynamic mechanical properties Part 1: General principles (ISO 6721-1:1994 + Corr 1:1995) DIN EN ISO 6721-2, Plastics Determi
29、nation of dynamic mechanical properties Part 2: Torsion-pendulum method (ISO 6721-2:1994 + Corr 1:1995) 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-
30、5, Paints 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 IEC 60167, Methods of test for the dete
31、rmination 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 ra-ted for medium pressures)*)NF A 49-112, Tubes e
32、n acier Tubes sans soudure extrmits lisses lamins chaud avec caractris-tiques garanties temprature ambiante et conditions particulires de livraison Dimensions Conditions techniques de livraison (Steel tubes Plain end seamless hot rolled tubes with specified room temperature properties and subject to
33、 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 conditions particulires de livraison Dimensions Cond
34、itions techniques de livraison (Steel tubes Plain end longi-tudinally 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 conditions)*)NF E 29-204, Tuyauteries indust
35、rielles Brides et collets forgs en aciers Matriaux Caractristiques mcaniques Fabrication Essais (Industrial pipeworks Forged steel flanges and collars Materials Mechanical properties Manufacture Testing)1)GKV-Richtlinie (GKV Code of practice), Qualittsanforderungen, Prfrichtlinien und Toleranzen fr
36、PTFE-Produkte (Quality requirements, test methods and tolerances for PTFE products)2)*) Document withdrawn. 1) Obtainable from Beuth Verlag GmbH, Burggrafenstr. 6, 10787 Berlin, Germany. 2) Obtainable from Fachverband Bau-, Mbel- und Industrie-Halbzeuge aus Kunststoff im Gesamtverband Kunststoff-ver
37、arbeitende Industrie e.V., Am Hauptbahnhof 12, 60329 Frankfurt, Germany. DIN 2874:2002-06 6 Directive 97/23/EC of the European Parliament and of 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. 11
38、0 3 Requirements 3.1 Materials 3.1.1 Steel and cast iron components Materials shall be selected by the customer or manufacturer from table 1. Table 1 Materials for steel and cast iron components Equivalent French steel grade Components Material (grade) Material no. Product form Technical delivery co
39、nditions as in Name Technical delivery conditions as in 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 St 37.8 I 1.0315 Welded DIN 17177b Seamless DIN 17458 X6CrNiTi18-10 1.4541 Welded DIN 17457 Seam
40、less DIN 17458 Pipes X6CrNiMoTi17-12-2 1.4571 Welded DIN 17457 P235 P265 E DIN EN 10253-2 X6CrNiN18-10 1.4541 Elbows, T-pieces, reducers X6CrNiMoTi17-12-2 1.4571 DIN 2609 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
41、1.0254 Pipe DIN 1629aTS 220 A NF A 49-142 P265GH 1.0425 Sheet metal DIN EN 10028-1 and DIN EN 10028-2 C 22.3 1.0427 BF 112 C 22.8 1.0460 DIN 2528 BF 42 N NF E 29-204 X6CrNiTi18-10 1.4541 Weld-neck collars and flanges, weld-on plate col-lars and flanges, re-ducers, spac-ers, blank flanges and instrum
42、ent nozzles X6CrNiMoTi17-12-2 1.4571 Forging DIN EN 10222-5 EN-GJS-400-18-LT 0.7043 Casting DIN EN 1563 Flanged el-bows, tees and reducers, reducing flanges and instrument nozzles GP240GH 1.0619 Casting DIN EN 10213-2 S235JRG2 1.0038 S355J2G3 1.0570 Sheet metal DIN EN 10025 series C 22.3 1.0427 BF 1
43、12 C 22.8 1.0460 Forging DIN 2528 BF 42 N 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 *). DIN 2874:2002-06 7 It may be assumed that the application of a lining will not change the properties of the semi-finished product,
44、the chemical composition and mechanical properties of which shall conform to the relevant standards listed in table 1. 3.1.2 Lining The material characteristics of PTFE linings shall comply with the relevant GKV Richtlinie (see clause 2). If linings are to be immune to electrostatic discharge as in
45、table 3, this shall be stated when ordering. Table 2 Characteristics of materials for linings not immune to electrostatic discharge (see subclause 3.7) Characteristics Material Product form Direction of samplinga Minimum tensile strength, in N/mm2Minimum elongation at break, as a percentage Density,
46、 in g/cm3Film and sheet up to 5 mm thick, moulded from pourable granulate 23 260 non-pourable granulate A 28,5 300 Paste-extruded product Paste-extruded B 26 275 Ram-extruded product C 22 230 Non-presintered PTFE powder B 25,5 265 C 19 190 PTFE Presintered PTFE powder B 20 210 2,14 to 2,2 PFA Molten
47、 D 21 300 2,12 to 2,16 aLetters are used as in DIN EN ISO 6721-1 and DIN EN ISO 6721-2 for tensile testing to indicate the direction of sampling as follows: A direction unspecified B transversely to direction of extrusion C longitudinally to direction of extrusion D specimens manufactured at the sam
48、e time as lining DIN 2874:2002-06 8 Table 3 Characteristics of materials for linings immune to electrostatic discharge (see subclause 3.7) Characteristics Material Product form Direction of samplinga Minimum tensile strength, in N/mm2Minimum elongation at break, as a percentage Density, in g/cm3Film
49、 and sheet up to 5 mm thick, moulded from pourable granulate 22 250 non-pourable granulate A 25 280 Paste-extruded product Paste-extruded B 26 275 Ram-extruded product C 22 230 Non-presintered PTFE powder B 25,5 265 C 19 190 PTFE Presintered PTFE powder B 20 210 2,14 to 2,17 PFA Molten D 20 270 2,11 to 2,16
