1、BS EN 378-2:2016Refrigerating systems andheat pumps Safety andenvironmental requirementsPart 2: Design, construction, testing,marking and documentationBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 378-2:2016 BRITISH STANDARDNational forewordThis British Stand
2、ard is the UK implementation of EN 378-2:2016. It supersedes BS EN 378-2:2008+A2:2012 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee RHE/18, Refrigeration safety.A list of organizations represented on this committee can be obtained on request to its s
3、ecretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 84661 8 ICS 27.080; 27.200 Compliance with a British Stand
4、ard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 378-2:2016EUROPEAN STANDARD NORME EUROPENNE EUR
5、OPISCHE NORM EN 378-2 November 2016 ICS 27.080; 27.200 Supersedes EN 378-2:2008+A2:2012English Version Refrigerating systems and heat pumps - Safety and environmental requirements - Part 2: Design, construction, testing, marking and documentation Systmes frigorifiques et pompes chaleur - Exigences d
6、e scurit et denvironnement - Partie 2: Conception, construction, essais, marquage et documentation Klteanlagen und Wrmepumpen - Sicherheitstechnische und umweltrelevante Anforderungen - Teil 2: Konstruktion, Herstellung, Prfung, Kennzeichnung und Dokumentation This European Standard was approved by
7、CEN on 3 September 2016. CEN members are bound to comply with the CEN/CENELEC 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 stand
8、ards may be obtained on application to the CEN-CENELEC Management 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 no
9、tified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary,
10、Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Ma
11、nagement Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 378-2:2016 EBS EN 378-2:2016EN 378-2:2016 (E) 2 Contents Page European foreword . 5 Introduction 7 1 Scope 8 2 Normative refere
12、nces 8 3 Terms, definitions and abbreviated terms . 12 4 Significant hazards 13 5 Safety requirements 13 5.1 General safety and environmental requirements 13 5.1.1 General . 13 5.1.2 Hazards to persons, property and environment 13 5.2 Safety requirements for components and piping . 13 5.2.1 General
13、requirements 13 5.2.2 Specific requirements . 15 5.3 Miscellaneous components 16 5.3.1 Materials 16 5.3.2 Testing 18 5.3.3 Marking 20 5.3.4 Documentation 20 6 Requirements for assemblies 21 6.1 General . 21 6.2 Design and construction 22 6.2.1 General . 22 6.2.2 Determination of the maximum allowabl
14、e pressure 22 6.2.3 Piping 25 6.2.4 Shut off devices . 30 6.2.5 Protection devices . 31 6.2.6 Application of protection devices 31 6.2.7 Indicating and measuring instruments (monitoring) 39 6.2.8 Liquid slugging in compressors 40 6.2.9 Electrical requirements . 40 6.2.10 Protection against hot surfa
15、ces. 40 6.2.11 Protection against moving parts 40 6.2.12 Vibration and drop test 40 6.2.13 Transport test 43 6.2.14 Protection against fire and explosion hazards 43 6.2.15 Requirements for ventilated enclosures . 45 6.2.16 Electromagnetic compatibility and fields (EMC, EMF) 45 6.2.17 Noise . 46 6.3
16、Testing 46 6.3.1 Tests 46 6.3.2 Strength pressure test 46 6.3.3 Tightness test . 47 6.3.4 Test of the complete refrigerating system before putting it into operation 49 6.4 Marking and documentation 50 BS EN 378-2:2016EN 378-2:2016 (E) 3 6.4.1 General . 50 6.4.2 Marking 50 6.4.3 Documentation 52 Anne
17、x A (normative) Additional requirements for refrigerating systems containing R-717 . 55 A.1 Systems with a refrigerant charge above 50 kg . 55 A.2 Systems with a refrigerant charge above 3 000 kg . 55 A.3 Pumps . 55 Annex B (normative) Determination of category for components and refrigerating syste
18、m assemblies . 56 B.1 General . 56 B.2 Classification of the refrigerant . 56 B.3 Determine the maximum allowable pressure of the assembly . 56 B.4 Determine the state (liquid or gas) of the refrigerant 56 B.5 Determination of category of components 56 B.5.1 General . 56 B.5.2 Pressure vessels and p
19、iping 56 B.5.3 Safety accessories . 60 B.5.4 Joining of pressure equipment 60 B.6 Determination of category of the assembly 63 Annex C (normative) Requirements for intrinsic safety test . 64 C.1 General . 64 C.2 Determination of the maximum pressure during abnormal operation . 64 C.2.1 Determination
20、 of the pressure at the high pressure side (PHIS) . 64 C.2.2 Determination of the pressure at the low pressure side (PLIS) . 64 C.2.3 Determination of PHIS and PLIS for reversible heat pumps . 65 C.3 Strength pressure test . 65 C.4 Test results 65 Annex D (normative) List of significant hazards 66 A
21、nnex E (informative) Assessment of assemblies for compliance with directive 2014/68/EU 67 Annex F (informative) Examples for arrangement of pressure relief devices in refrigerating systems . 68 Annex G (informative) Checklist for external visual inspection of the installation 71 Annex H (informative
22、) Stress corrosion cracking . 73 H.1 Introduction 73 H.2 Stress corrosion in copper 73 H.3 Stress corrosion in steel . 73 H.4 Factors that influence stress corrosion cracking 74 BS EN 378-2:2016EN 378-2:2016 (E) 4 H.4.1 General . 74 H.4.2 Yield strength 74 H.4.3 Temperature 74 H.4.4 Oxygen content .
23、 74 H.4.5 Water content 74 H.4.6 Age of equipment . 74 H.4.7 Avoiding stress corrosion cracking . 75 H.4.8 Conclusions 75 Annex I (informative) Leak simulation test for A2L, A2, A3, B2L, B2, B3 refrigerants 76 Annex J (informative) Commissioning procedure . 78 Annex K (informative) Information on ef
24、fective ignition sources 79 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2014/68/EU . 81 Annex ZB (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC . 83 Bibliography
25、 . 85 BS EN 378-2:2016EN 378-2:2016 (E) 5 European foreword This document (EN 378-2:2016) 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
26、 national standard, either by publication of an identical text or by endorsement, at the latest by May 2017, and conflicting national standards shall be withdrawn at the latest by May 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
27、rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 378-2:2008+A2:2012. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essent
28、ial requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document. EN 378 consists of the following parts under the general title “Refrigerating systems and heat pumps Safety and environmental requirements”: Part
29、1: Basic requirements, definitions, classification and selection criteria; Part 2: Design, construction, installing, testing, marking and documentation; Part 3: Installation site and personal protection; Part 4: Operation, maintenance, repair and recovery. The main changes in part 2 with respect to
30、the previous edition are listed below: Harmonization as far as possible with ISO 5149:2014 and ISO 817:2014; Harmonizing requirements with DIRECTIVE 2014/68/EU (PED), related to pressure and DIRECTIVE 2006/42/EC (MD). Following detailed changes are worth noting: In 5.2.1, the application of harmoniz
31、ed standard for components has been clarified, by making the note normative; The content of the former Table 3 has been integrated in 6.2.6.2, with necessary modifications of the flow chart in Figure 1; Replacement of 6.2.2.3 with requirements related to pressure rise in case of external fire; Impro
32、vement 6.2.5.2.2, regarding electronic safety switching devices for limiting the pressure; Rearrangement of the transport and vibration tests formerly 6.2.12 and now 6.2.12 and 6.2.13; BS EN 378-2:2016EN 378-2:2016 (E) 6 Modification of the explosion hazard requirements in 6.2.14 (formerly 6.2.13);
33、Addition of Annex H on stress corrosion cracking, Annex I on leak simulation test, Annex J on commissioning procedure, Annex K on ignition sources; Modification of Annex ZA for harmonization with DIRECTIVE 2014/68/EU (PED); Deletion of Annex ZB and the update of Annex ZC (now new Annex ZB). Accordin
34、g to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Gr
35、eece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 378-2:2016EN 378-2:2016 (E) 7 Introduction The introduction of EN 378-1 is applicable. Th
36、is standard is a type C standard as stated in EN ISO 12100. The machinery concerned and the extent to which hazards, hazardous situations and hazardous events are covered are indicated in the scope of this standard. When provisions of this type C standard are different from those which are stated in
37、 type A or B standards, the provisions of this type C standard take precedence over the provisions of the other standards, for machines that have been designed and built according to the provisions of this type C standard. BS EN 378-2:2016EN 378-2:2016 (E) 8 1 Scope This European Standard specifies
38、the requirements for the safety of persons and property, provides guidance for the protection of the environment and establishes procedures for the operation, maintenance and repair of refrigerating systems and the recovery of refrigerants. The term “refrigerating system” used in this European Stand
39、ard includes heat pumps. This Part 2 of this Standard is applicable to the design, construction and installation of refrigerating systems including piping, components and materials. It includes ancillary equipment not covered in EN 378-1, EN 378-3 or EN 378-4 which is directly associated with these
40、systems. It also specifies requirements for testing, commissioning, marking and documentation. Requirements for secondary heat transfer circuits are excluded except for any protection requirements associated with the refrigerating system. Ancillary equipment includes, for example, fans, fan motors,
41、electrical motors and transmission assemblies for open compressor systems. This standard applies: a) to refrigerating systems, stationary or mobile, of all sizes except to vehicle air conditioning systems covered by a specific product standard, e.g. ISO 13043; b) to secondary cooling or heating syst
42、ems; c) to the location of the refrigerating systems; d) to replaced parts and added components after adoption of this standard if they are not identical in function and in the capacity. Systems using refrigerants other than those listed in EN 378-1:2016, Annex E are not covered by this standard. Th
43、is standard does not apply to goods in storage. This standard is not applicable to refrigerating systems which were manufactured before the date of its publication as a European Standard except for extensions and modifications to the system which were implemented after publication. This standard is
44、applicable to new refrigerating systems, extensions or modifications of already existing systems, and for existing stationary systems, being transferred to and operated on another site. This standard also applies in the case of the conversion of a system to another refrigerant type, in which case co
45、nformity to the relevant clauses of parts 1 to 4 of the standard shall be assessed. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For un
46、dated references, the latest edition of the referenced document (including any amendments) applies. EN 378-1:2016, Refrigerating systems and heat pumps Safety and environmental requirements Part 1: Basic requirements, definitions, classification and selection criteria EN 378-3:2016, Refrigerating sy
47、stems and heat pumps Safety and environmental requirements Part 3: Installation site and personal protection EN 378-4, Refrigerating systems and heat pumps Safety and environmental requirements Part 4: Operation, maintenance, repair and recovery BS EN 378-2:2016EN 378-2:2016 (E) 9 EN 809, Pumps and
48、pump units for liquids Common safety requirements EN 837-1:1996, Pressure gauges Part 1: Bourdon tube pressure gauges Dimensions, metrology, requirements and testing EN 837-2:1997, Pressure gauges Part 2: Selection and installation recommendations for pressure gauges EN 837-3:1996, Pressure gauges P
49、art 3: Diaphragm and capsule pressure gauges Dimensions, metrology, requirements and testing EN 1012-3, Compressors and vacuum pumps Safety requirements Part 3: Process compressors EN 1092-1, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 1: Steel flanges EN 1092-3:2003, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 3: Copper alloy flanges EN 1736:2008, Refrigerating systems and heat pu
