1、October 2007DEUTSCHE NORM English price group 16No part of this standard 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 91.140.40!$IS“1389048w
2、ww.din.deDDIN EN 1775Gas supply Gas pipework for buildings Maximum operating pressure less than or equal to 5 bar Functional recommendationsEnglish version of DIN EN 1775:2007-10Gasversorgung Gasleitungsanlagen fr Gebude Maximal zulssiger Betriebsdruck kleiner oder gleich 5 bar Funktionale Empfehlun
3、genEnglische Fassung DIN EN 1775:2007-10SupersedesDIN EN 1775:2001-06www.beuth.deDocument comprises 47 pages DIN EN 1775:2007-10 2 National foreword This standard has been prepared by Technical Committee CEN/TC 234 “Gas supply” (Secretariat: DIN, Germany). The responsible German body involved in its
4、 preparation was the Normenausschuss Gastechnik (Gas Technology Standards Committee), Technical Committee Gasinstallation. This standard gives functional and safety-related recommendations. It covers the design, construction, testing, commissioning, operation and maintenance of gas installation pipe
5、work in residential buildings and those of similar occupancy. EN 15001 (in preparation) applies to industrial gas installation pipework having a maximum operation pressure (MOP) greater than 0,5 bar or gas installations having an MOP greater than 5 bar. In Germany, DVGW G 600 “Technical specificatio
6、ns for gas installations” and the TRF “Technical rules for liquefied gases” apply to the gas installations covered by the present standard. These technical rules contain detailed design specifications supplementing the general recommendations of the present standard. It is intended to include this s
7、tandard in the body of Codes of practice for gas issued by the DVGW Deutscher Verein des Gas- und Wasserfaches e.V. (German Association of Gas and Water Engineers). Amendments This standard differs from DIN EN 1775:2001-06 as follows: a) Industrial gas installations having a maximum operation pressu
8、re (MOP) greater than 0,5 bar or gas installations having an MOP greater than 5 bar are no longer included in the scope of this standard. b) The scope has been extended to include pipework supplied from liquefied petroleum gas (LPG) storage vessels. Single appliance LPG installations without fixed p
9、ipework, achieved by a flexible appliance connector from an adjacent LPG storage cylinder, and the LPG storage vessels themselves remain outside the scope of the standard. c) In clause 3 “Terms and definitions” the definition of the term “point of delivery” has been revised. d) In the clauses on des
10、ign, construction and testing, additional installation and jointing methods have been introduced to take new materials and pipework systems into consideration. Previous editions DIN EN 1775: 1998-12, 2001-06 EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1775August 2007ICS 91.140.40 Supersedes EN
11、 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 lesbtiments - Pression maximale de service infrieure ougale 5 bar - Recommandations fonctionnellesGasvers
12、orgung - 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 bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving thi
13、s 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 CEN Management Centre or to any CEN member.This European Standard exists in three official versions (En
14、glish, 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 status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria,
15、 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, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONC
16、OMIT 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 for CEN national Members.Ref. No. EN 1775:2007: EEN 1775:2007 (E) 2 Contents Foreword4 1 Scope 6 2 Norm
17、ative 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 Definitions relating to jointing methods9 3.5 Definitions relating to fittings.10 3.6 Definitions relating to
18、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 soldering and brazing12 4 Design .12 4.1 General12 4.2 Selection of components 13 4.3 Location 13 4.4 Protectio
19、n 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 joints .17 5.2.3 Mechanical joints.17 5.2.4 Pressed joints 17 5.2.5 Stainless steel pliable corrugated tub
20、ing 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 recommendations .20 6.2 Recommendations relating to the safety of persons and property during testing 20 6.
21、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 Additional tests22 7 Commissioning22 7.1 General22 7.2 Admission of gas.23 8 Operation and maintenance .23 8
22、.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 high temperatures 27 A.1 General27 A.2 Procedure A .27 A.2.1 Test criteria 27 A.2.2 Test method .27 A.3 P
23、rocedure 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 Control.31 B.4 Documentation.31 Annex C (informative) Guidelines for the construction of welded, brazed, sold
24、ered 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 and including 0,1 bar and a wall thickness less than 4mm 32 C.1.4 Pipework with a maximum operating pre
25、ssure (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 Pipework with a maximum operating pressure (MOP) up to and including 0,1 bar .34 C.2.4 Pipework with a max
26、imum 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 Quality control .36 Annex D (informative) Guidelines for the construction of pressed joints.39 D.1 Jointi
27、ng 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 Installation process40 Annex E (informative) Guidelines for the construction of stainless steel pliable corrugat
28、ed 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 Quality control .42 Bibliography43 EN 1775:2007 (E) 4 Foreword This document (EN 1775:2007) has been pre
29、pared 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 identical text or by endorsement, at the latest by February 2008, and conflicting national standards sha
30、ll 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 concerning design, construction, operation and maintenance, all for the safety and integrity of gas supply
31、 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 bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Est
32、onia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 1775:2007 (E) 5 Introduction This functional standard is to be used as
33、 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 country to design and construct gas installations for buildings. At the time this standard was prepared
34、, 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 place in member countries shall be identified in CEN/TR 13737. It is important to ensure that designer
35、s 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 safety of persons, animals and property and the protection of their environment. The recommendations in thi
36、s 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 imposed by gas distribution system operators, LPG suppliers or public authorities upon companies who design,
37、 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 maintenance of installation pipework; pipework between the delivery point of the gas and the inlet connection to
38、 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 codes of practice may exist in the CEN member countries. This standard is intended to be applied in associa
39、tion 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 legislation/regulation with the requirements of this standard, national legislation/regulation takes precedenc
40、e 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 requirements; - national contact point for the latest information. This standard applies to: gas installations in
41、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 than or equal to 0,5 bar. NOTE 2 For industrial gas installations having a MOP above 0,5 bar, or insta
42、llations 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 standard does not contain detailed recommendations relating to the laying of buried pipework. NOTE 3 For
43、 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 gas metering systems, see EN 1776. 1.2 This standard is applicable to installation pipework supplied fro
44、m 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 connector from an adjacent LPG storage cylinder. LPG storage vessels. 1.3 In this standard the term gas refer
45、s 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 (LPG). They are also referred to as first, second or third family gases (see EN 437). In this standard
46、, 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. For dated references, only the edition cited applies. For undated references, the latest edition of the r
47、eferenced 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 pressures Appliance categories EN 751-1, Sealing materials for metallic threaded joints in contact with 1st, 2n
48、d 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 2: Non-hardening jointing compounds EN 751-3, Sealing materials for metallic threaded joints in contac
49、t 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 applications 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 1763, Flexible rubber and plastics hose
