1、BRITISH STANDARDBS EN 1775:2007Gas supply Gas pipework for buildings Maximum operating pressure less than or equal to 5 bar Functional recommendationsThe European Standard EN 1775:2007 has the status of a British StandardICS 91.140.40g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g
2、51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 1775:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2007 BSI 2007ISBN 978 0 580 55018 8
3、National forewordThis British Standard is the UK implementation of EN 1775:2007. It supersedes BS EN 1775:1998 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee GSE/33, Gas supply.A list of organizations represented on this committee can be obtained on r
4、equest to its secretary.This standard describes the common principles and recognized practices concerning the design, construction, operation and maintenance necessary for the safety and integrity of gas supply systems, and takes the form of general requirements and recommendations. Further requirem
5、ents for use within the UK can be found in BS 6891:2005, Installation of low pressure gas pipework of up to 35 mm (R1) in domestic premises (2nd family gas) Specification and the Institution of Gas Engineers and Managers publication, IGE/UP/2, Gas installation pipework, boosters and compressors on i
6、ndustrial and commercial premises.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Da
7、te CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1775August 2007ICS 91.140.40 Supersedes EN 1775:1998 English VersionGas supply - Gas pipework for buildings - Maximum operatingpressure less than or equal to 5 bar - FunctionalrecommendationsAlimentation en gaz - Tuyauteries de gaz pour le
8、sbtiments - Pression maximale de service infrieure ougale 5 bar - Recommandations fonctionnellesGasversorgung - Gasleitungsanlagen fr Gebude -Maximal zulssiger Betriebsdruck kleiner oder gleich 5 bar -Funktionale EmpfehlungenThis European Standard was approved by CEN on 30 June 2007.CEN members are
9、bound to comply with 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 nationalstandards may be obtained on application to the
10、CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same stat
11、us as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Sl
12、ovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide
13、for CEN national Members.Ref. No. EN 1775:2007: EEN 1775:2007 (E) 2 Contents Foreword4 1 Scope 6 2 Normative references 7 3 Terms and definitions .7 3.1 Definitions relating to pressures7 3.2 Definitions relating to the gas installation 8 3.3 Definitions relating to means of isolation .9 3.4 Definit
14、ions relating to jointing methods9 3.5 Definitions relating to fittings.10 3.6 Definitions relating to tests 11 3.7 Definitions relating to commissioning, operation and maintenance .11 3.8 Definitions relating to assembling processes 12 3.8.1 Definitions for welding 12 3.8.2 Definitions for solderin
15、g and brazing12 4 Design .12 4.1 General12 4.2 Selection of components 13 4.3 Location 13 4.4 Protection in case of fire.14 4.5 Sizing 14 4.6 Safety devices15 5 Construction.16 5.1 Installation 16 5.2 Pipework jointing methods.16 5.2.1 Threaded joints 16 5.2.2 Welded, brazed, soldered and fusion joi
16、nts .17 5.2.3 Mechanical joints.17 5.2.4 Pressed joints 17 5.2.5 Stainless steel pliable corrugated tubing system jointing18 5.3 Entries through walls and floors18 5.4 Corrosion18 5.5 Means of isolation18 5.6 Regulators and meters19 5.7 Flexible appliance connectors .19 6 Testing 20 6.1 General reco
17、mmendations .20 6.2 Recommendations relating to the safety of persons and property during testing 20 6.3 Test fluids.20 6.3.1 Fluids used .20 6.3.2 Use of inert gas21 6.3.3 Utilisation of the gas to be distributed 21 6.4 Test conditions 21 6.5 Strength testing .21 6.6 Tightness testing .21 6.7 Addit
18、ional tests22 7 Commissioning22 7.1 General22 7.2 Admission of gas.23 8 Operation and maintenance .23 8.1 General23 8.2 Maintenance .24 8.3 Abnormal situations 24 EN 1775:2007 (E) 3 8.4 Leak detection25 8.5 Work on operating pipework 25 8.6 Purging from gas .25 Annex A (informative) Resistance to hi
19、gh temperatures 27 A.1 General27 A.2 Procedure A .27 A.2.1 Test criteria 27 A.2.2 Test method .27 A.3 Procedure B .28 A.3.1 Test criteria 28 A.3.2 Test method .29 Annex B (informative) General guidelines for the construction of joints30 B.1 General30 B.2 Installation operatives.30 B.3 Quality Contro
20、l.31 B.4 Documentation.31 Annex C (informative) Guidelines for the construction of welded, brazed, soldered joints, and polyethylene fusion joints 32 C.1 Welding of steel .32 C.1.1 Materials .32 C.1.2 Approval of the welding procedure .32 C.1.3 Pipework with a maximum operating pressure (MOP) up to
21、and including 0,1 bar and a wall thickness less than 4mm 32 C.1.4 Pipework with a maximum operating pressure (MOP) over 0,1 bar or wall thickness including and above 4 mm.33 C.2 Brazing and soldering of copper and copper alloys34 C.2.1 Materials .34 C.2.2 Brazing and soldering procedure 34 C.2.3 Pip
22、ework with a maximum operating pressure (MOP) up to and including 0,1 bar .34 C.2.4 Pipework with a maximum operating pressure (MOP) over 0,1 bar.35 C.3 Fusion jointing of polyethylene .35 C.3.1 Materials .35 C.3.2 Polyethylene fusion jointing procedure36 C.3.3 Qualification of personnel 36 C.3.4 Qu
23、ality control .36 Annex D (informative) Guidelines for the construction of pressed joints.39 D.1 Jointing procedure with press fittings on copper pipes .39 D.1.1 General39 D.1.2 Installation process39 D.2 Jointing procedure with press fittings on multi-layer and PEX40 D.2.1 General40 D.2.2 Installat
24、ion process40 Annex E (informative) Guidelines for the construction of stainless steel pliable corrugated tubing systems 41 E.1 General41 E.2 Components of the system 41 E.3 Stainless steel pliable corrugated tubing systems jointing procedure .41 E.3.1 General41 E.3.2 Training of personnel41 E.3.3 Q
25、uality control .42 Bibliography43 EN 1775:2007 (E) 4 Foreword This document (EN 1775:2007) has been prepared by Technical Committee CEN/TC 234 “Gas supply”, 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 i
26、dentical text or by endorsement, at the latest by February 2008, and conflicting national standards shall be withdrawn at the latest by February 2008. This document supersedes EN 1775:1998. The CEN/TC 234 functional standards specify the common appropriate principles and the recognised practices con
27、cerning design, construction, operation and maintenance, all for the safety and integrity of gas supply systems, taking the form of general recommendations and/or requirements. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are boun
28、d to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Sw
29、itzerland and United Kingdom. EN 1775:2007 (E) 5 Introduction This functional standard is to be used as a reference standard in codes of practice in CEN member countries. These codes of practice also need to take account of regulations made by the municipal, regional or national authorities in each
30、country to design and construct gas installations for buildings. At the time this standard was prepared, new pipe materials and jointing techniques were being developed or are already authorized for use in some member countries. Any requirements additional to the requirements of this standard put in
31、 place in member countries shall be identified in CEN/TR 13737. It is important to ensure that designers and installation operatives are trained in the correct methods of application for each system as prepared by its supplier/manufacturer. This standard contains general recommendations for the safe
32、ty of persons, animals and property and the protection of their environment. The recommendations in this standard are intended to be applied by competent persons who have suitable knowledge and experience. This standard does not consider contractual agreements, qualifications or authorizations impos
33、ed by gas distribution system operators, LPG suppliers or public authorities upon companies who design, construct or work on gas installations. EN 1775:2007 (E) 6 1 Scope 1.1 This standard specifies general recommendations for the design, construction, testing, commissioning, operation and maintenan
34、ce of installation pipework; pipework between the delivery point of the gas and the inlet connection to the gas appliance. This standard specifies common basic principles for gas installation pipework. Users of this European standard need to be aware that more detailed national standards and/or code
35、s of practice may exist in the CEN member countries. This standard is intended to be applied in association with these national standards and/or codes of practice setting out the above mentioned basic principles. In the event of conflicts in terms of more restrictive requirements in national legisla
36、tion/regulation with the requirements of this standard, national legislation/regulation takes precedence as illustrated in CEN /TR 13737. NOTE 1 CEN/TR 13737 contains: - clarification of relevant legislation/regulations applicable in a country; - if appropriate, more restrictive national requirement
37、s; - national contact point for the latest information. This standard applies to: gas installations in residential, commercial and public access building having a maximum operating pressure (MOP) less than or equal to 5 bar; industrial gas installations having a maximum operating pressure (MOP) less
38、 than or equal to 0,5 bar. NOTE 2 For industrial gas installations having a MOP above 0,5 bar, or installations having a MOP above 5 bar, see prEN 15001-1. This standard is applicable to new installation pipework as well as to replacements of, or extensions to, existing installation pipework. This s
39、tandard does not contain detailed recommendations relating to the laying of buried pipework. NOTE 3 For more information on buried pipework, see EN 12007-1, EN 12007-2 and EN 12007-3. NOTE 4 For more information on gas pressure regulating installations, see EN 12279. NOTE 5 For more information on g
40、as metering systems, see EN 1776. 1.2 This standard is applicable to installation pipework supplied from gas distribution systems and from liquefied petroleum gases (LPG) storage vessels. Excluded are: single appliance LPG installations without fixed pipework, achieved by a flexible appliance connec
41、tor from an adjacent LPG storage cylinder. LPG storage vessels. 1.3 In this standard the term gas refers to combustible gases, which are gaseous at 15 C and 1 013,25 mbar. These gases, odorized for safety reasons, are commonly referred to as manufactured gas, natural gas or liquefied petroleum gases
42、 (LPG). They are also referred to as first, second or third family gases (see EN 437). In this standard, all pressures are gauge pressures, unless otherwise stated. EN 1775:2007 (E) 7 2 Normative references The following referenced documents are indispensable for the application of this document. Fo
43、r dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 331, Manually operated ball valves and closed bottom taper plug valves for gas installations for buildings EN 437, Test gases Test pressure
44、s Appliance categories EN 751-1, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water Part 1: Anaerobic jointing compounds EN 751-2, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part
45、 2: Non-hardening jointing compounds EN 751-3, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water Part 3: Unsintered PFTE tapes EN 1057, Copper and copper alloys Seamless, round copper tubes for water and gas in sanitary and heating application
46、s EN 1254-4, Copper and copper alloys Plumbing fittings Part 4: Fittings combining other end connections with capillary or compression ends EN 1762, Rubber hoses and hose assemblies for liquefied petroleum gas LPG (liquid or gaseous phase) and natural gas up to 25 bar (2,5 Mpa) Specification prEN 17
47、63, Flexible rubber and plastics hoses, tubing, coupling tails and assemblies for use with propane and butane in the vapour phase Requirements EN 10226-1, Pipe threads where pressure tight joints are made on the threads Part 1: Taper external threads and parallel internal threads Dimensions, toleran
48、ces and designation EN 10226-2, Pipe threads where pressure tight joints are made on the threads Part 2: Taper external threads and taper internal threads Dimensions, tolerances and designation EN 10242, Threaded pipe fitting in malleable cast iron EN 14291, Foam producing solutions for leak detecti
49、on on gas installations EN 14800, Corrugated safety metal hose assemblies for the connection of domestic appliances using gaseous fuels 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Definitions relating to pressures 3.1.1 design pressure pressure on which design calculations are based 3.1.2 operating pressure (OP) pressure which occurs within the pipework under normal operating conditions EN 1775:2007 (E) 8 3.1.3 maximum operating pressure (MOP) maximum pressure a
