1、May 2011 Translation by DIN-Sprachendienst.English price group 14No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 23
2、.020.30; 27.080; 27.200!$pk“1777292www.din.deDDIN EN 14276-2Pressure equipment for refrigerating systems and heat pumps Part 2: Piping General requirements (includes Amendment A1:2011)English translation of DIN EN 14276-2:2011-05Druckgerte fr Klteanlagen und Wrmepumpen Teil 2: Rohrleitungen Allgemei
3、ne Anforderungen (enthlt nderung A1:2011)Englische bersetzung von DIN EN 14276-2:2011-05Equipement sous pression pour systmes de rfrigration et pompes chaleur Partie 2: Tuyauteries Exigences gnrales (Amendement A1:2011 inclus)Traduction anglaise de DIN EN 14276-2:2011-05SupersedesDIN EN 14276-2:2007
4、-08www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.3104.11 DIN EN 14276-2:2011-05 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 182 “Refrigerating systems, sa
5、fety and environmental requirements” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Kltetechnik (Refrigeration Technology Standards Committee), Working Group NA 044-00-01-05 AK Druckbehlter in Klteanlagen of Working Committee NA 044-00-01
6、 AA Sicherheit und Umweltschutz. Amendments This standard differs from DIN EN 14276-2:2007-08 as follows: a) normative references have been updated; b) Table 7 “NDT methods, techniques, characterisation, acceptance criteria” has been modified. Previous editions DIN EN 14276-2: 2007-08 2 EUROPEAN STA
7、NDARD NORME EUROPENNE EUROPISCHE NORM EN 14276-2:2007+A1 February 2011 ICS 23.020.30; 27.080; 27.200 Supersedes EN 14276-2:2007English Version Pressure equipment for refrigerating systems and heat pumps Part 2: Piping General requirements Equipements sous pression pour systmes de rfrigration et pomp
8、es chaleur Partie 2: Tuyauteries Exigences gnrales Druckgerte fr Klteanlagen und Wrmepumpen Teil 2: Rohrleitungen Allgemeine Anforderungen This European Standard was approved by CEN on 17 February 2007 and includes Amendment 1 approved by CEN on 13 December 2010.CEN members are bound to comply with
9、the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard 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 CEN-CENELEC Manageme
10、nt Centre or to any CEN member. This European Standard 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 CEN-CENELEC Management Centre has the same status
11、 as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, R
12、omania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserv
13、ed worldwide for CEN national Members. Ref. No. EN 14276-2:2007+A1:2011: EEN 14276-2:2007+A1:2011 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 63 Terms, definitions, symbols, quantities and units .74 Material .85 Piping classification 96 Design 117 Manufacturing . 178
14、 Testing and inspection . 17Annex A (informative) DN System 27Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC . 28Bibliography . 29DIN EN 14276-2:2011-05 EN 14276-2:2007+A1:2011 (E) 3 Foreword This document (EN 14276-2:2007+A
15、1:2011) has been prepared by Technical Committee CEN/TC 182 “Refrigerating systems, safety and environmental requirements”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement,
16、at the latest by August 2011, and conflicting national standards shall be withdrawn at the latest by August 2011. This document includes Amendment 1, approved by CEN on 2010-12-13. This document supersedes EN 14276-2:2007. The start and finish of text introduced or altered by amendment is indicated
17、in the text by tags ! “. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This European Standard has been prepared under a mandate give
18、n to CEN by the European Commission and the European Free Trade Association, and supports Essential Requirements of EU Directive 97/23/EC concerning pressure equipment. For relationship with EU Directive 97/23/EC, see informative Annex ZA, which is an integral part of this document. This document co
19、nsists of the following parts under the general title Pressure equipment for refrigerating systems and heat pumps: Part 1: Vessels General requirements; Part 2: Piping General requirements. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following count
20、ries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slove
21、nia, Spain, Sweden, Switzerland and United Kingdom. DIN EN 14276-2:2011-05 EN 14276-2:2007+A1:2011 (E) 4 Introduction This European Standard recognises the unique nature of piping for refrigerating systems or heat pumps and is intended to address the specific needs of the refrigeration and heat pump
22、 industry. This European Standard should be read in conjunction with the various parts of EN 13480 and !EN 14276-1:2006+A1“. The unique nature of a refrigerating system is defined in the introduction of !EN 14276-1:2006+A1“. DIN EN 14276-2:2011-05 EN 14276-2:2007+A1:2011 (E) 5 1 Scope 1.1 This Europ
23、ean Standard specifies the requirements for material, design, manufacturing, testing and documentation for stationary piping intended for use in refrigerating systems, heat pumps and secondary cooling and heating systems. These refrigerating systems and heat pump systems are referenced in this stand
24、ard as refrigerating systems as defined in EN 378-1. 1.2 This European Standard applies to piping including welded or brazed attachments up to and including the flanges, screwed, welded or brazed connectors or to the edge to be welded or brazed at the first circumferential joint connecting piping or
25、 other elements. 1.3 This European Standard applies to the selection, application and installation of safety accessories intended to protect the piping during the various phases of the refrigeration cycle. 1.4 This European Standard applies to the following piping: heat exchanger consisting of pipin
26、g for the purpose of cooling or heating air where piping aspects are predominant; piping incorporated into an assembly (e.g. self contained system, condensing unit); field erected piping. 1.5 This European Standard applies to piping with an internal pressure down to 1 bar, to account for the evacuat
27、ion of the piping prior to charging with refrigerant. 1.6 This European Standard applies to both the mechanical loading conditions and thermal conditions as defined in EN 13480-3 associated with refrigerating systems. It applies to piping subject to the maximum allowable temperatures for which nomin
28、al design stresses for materials are derived using !EN 14276-1:2006+A1“ or as specified in this European Standard. In addition piping designed to this standard needs to have a maximum design temperature not exceeding 200 C and a maximum design pressure not exceeding 64 bar. Outside of these limits,
29、EN 13480 should be used for the design construction and inspection of the piping. Under these circumstances the unique nature of a refrigerating plant, as indicated in the introduction of !EN 14276-1:2006+A1“, needs also to be taken into account. 1.7 This European Standard applies to piping where th
30、e main pressure bearing parts are manufactured from metallic ductile materials as defined in Clause 4 and in !EN 14276-1:2006+A1“. DIN EN 14276-2:2011-05 EN 14276-2:2007+A1:2011 (E) 6 2 Normative references The following referenced documents are indispensable for the application of this document. Fo
31、r dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. !EN 378-1:2008+A1:2010, Refrigerating systems and heat pumps Safety and environmental requirements Part 1: Basic requirements, definitions, cl
32、assification and selection criteria EN 378-2:2008+A1:2009, Refrigerating systems and heat pumps Safety and environmental requirements Part 2: Design, construction, testing, marking and documentation EN 378-3:2008, Refrigerating systems and heat pumps Safety and environmental requirements Part 3: Ins
33、tallation site and personal protection EN 378-4:2008, Refrigerating systems and heat pumps Safety and environmental requirements Part 4: Operation, maintenance, repair and recovery“ EN 571-1:1997, Non destructive testing Penetrant testing Part 1: General principles EN 583-4:2002, Non-destructive tes
34、ting Ultrasonic examination Part 4: Examination for discontinuities perpendicular to the surface EN 764-1:2004, Pressure equipment Terminology Part 1: Pressure, temperature, volume, nominal size EN 764-2:2002, Pressure equipment Part 2: Quantities, symbols and units EN 764-3:2002, Pressure equipment
35、 Part 3: Definition of parties involved EN 764-4:2002, Pressure equipment Part 4: Establishment of technical delivery conditions for metallic materials EN 764-5:2002, Pressure equipment Part 5: Compliance and inspection documentation of materials EN 970:1997, Non-destructive examination of fusion we
36、lds Visual examination EN 1289:1998, Non-destructive examination of welds Penetrant testing of welds Acceptance levels EN 1435:1997, Non-destructive examination of welds Radiographic examination of welded joints EN 1653:1997, Copper and copper alloys Plate, sheet and circles for boilers, pressure ve
37、ssels and hot water storage units EN 1712:1997, Non-destructive examination of welds Ultrasonic examination of welded joints Acceptance levels EN 1714:1997, Non-destructive examination of welds Ultrasonic examination of welded joints EN 10204:2004, Metallic products Types of inspection documents EN
38、10246-9:2000, Non-destructive testing of steel tubes Part 9: Automatic ultrasonic testing of the weld seam of submerged arc welded steel tubes for the detection of longitudinal and/or transverse imperfections EN 10246-16:2000, Non-destructive testing of steel tubes Part 16: Automatic ultrasonic test
39、ing of the area adjacent to the weld seam of welded steel tubes for the detection of laminar imperfections DIN EN 14276-2:2011-05 EN 14276-2:2007+A1:2011 (E) 7 EN 12178:2003, Refrigerating systems and heat pumps Liquid level indicating devices Requirements, testing and marking EN 12517-1:2006, Non-d
40、estructive testing of welds Part 1: Evaluation of welded joints in steel, nickel, titanium and their alloys by radiography Acceptance levels EN 12735-1:2001, Copper and copper alloys Seamless, round copper tubes for air conditioning and refrigeration Part 1: Tubes for piping systems EN 12735-2:2001,
41、 Copper and copper alloys Seamless, round copper tubes for air conditioning and refrigeration Part 2: Tubes for equipment !EN 13445-3:2009, Unfired pressure vessels Part 3: Design“ EN 13480-2:2002, Metallic industrial piping Part 2: Materials EN 13480-3:2002, Metallic industrial piping Part 3: Desig
42、n and calculation !EN 14276-1:2006+A1:2011, Pressure equipment for refrigerating systems and heat pumps Part 1: Vessels General requirements“ EN 22553:1994, Welded, brazed and soldered joints Symbolic representation on drawings (ISO 2553:1992) !EN ISO 4063:2009, Welding and allied processes Nomencla
43、ture of processes and reference numbers (ISO 4063:2009)“ EN ISO 10042:2005, Welding Arc-welded joints in aluminium and its alloys Quality levels for imperfections (ISO 10042:2005) !EN ISO 23277:2009, Non-destructive testing of welds Penetrant testing of welds Acceptance levels (ISO 23277:2006)“ ISO
44、817:2005, Refrigerants Designation system 3 Terms, definitions, symbols, quantities and units !For the purposes of this document, the terms, definitions, symbols, quantities and units given in EN 378-1:2008+A1:2010, EN 764-1:2004, EN 764-2:2002, EN 764-3:2002, EN 764-4:2002, EN 764-5:2002, EN 14276-
45、1:2006+A1:2011 and the following apply.“ 3.1 Terms and definitions 3.1.1 coil heat exchanger consisting of pipe or tubing (more particularly made from one or more bent pipes) used to cool or heat air NOTE see Figure 1 DIN EN 14276-2:2011-05 EN 14276-2:2007+A1:2011 (E) 8 a) Coil with straight tubes a
46、nd elbows b) Coil with elbow and headers Figure 1 Coil 3.2 Symbols, quantities and units Symbols, quantities and units used in this standard are listed in Table 1. Table 1 Symbols, quantities and units Symbol Quantity Unit DNaNominal diameter DeExternal diameter of tube mm f Nominal design stress at
47、 design temperature MPa PcCalculation pressure (in formula, Pccan be replaced by P) MPa or bar bPdDesign pressure MPa or bar bPS Maximum allowable pressure MPa or bar bPtestTest pressure MPa or bar bRRadius of curvature for tube mm tcCalculation temperature C tdDesign temperature C z Joint coefficie
48、nt for welds aSee also Annex A b1 bar = 100 000 Pa = 0,1 MPa = 0,1 N/mm24 Material 4.1 General The materials referenced in this European Standard shall meet the requirements of !EN 14276-1:2006+A1“ unless modified by the subclauses of this clause. It is permitted to use non-metallic materials (e.g. gaskets, coatings, insulating materials, sight glasse
