BS EN 1489-2000 建筑物阀门.压力安全阀门.试验和要求.pdf

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 14892000 The European Standard EN 14892000 has the status of a British Standard ICS 91.140.60 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Building valves Pressure safety valves Tests and requirements Copyright British Standards Institution Provided by IHS under license with BSI Not for ResaleNo reproduction or networking permitted without license from IHS --,--,,,,,,,--- This British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 October 2000  BSI 10-2000 ISBN 0 580 36461 5 BS EN 14892000 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 14892000. The UK participation in its preparation was entrusted by Technical Committee B/504, Water supply, to Subcommittee B/504/7, Control and safety devices in drinking water systems, which has the responsibility to aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests ined; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 17 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Copyright British Standards Institution Provided by IHS under license with BSI Not for ResaleNo reproduction or networking permitted without license from IHS --,--,,,,,,,--- EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1489 March 2000 ICS 91.140.60 English version Building valves - Pressure safety valves - Tests and requirements Robinetterie de btiment - Soupapes de scurit - Essais et prescriptions Gebudearmaturen - Sicherheitsventile - Prfungen und Anforderungen This European Standard was approved by CEN on 3 February 2000. 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 standards may be obtained on application to the Central Secretariat 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any and by any means reserved worldwide for CEN national Members. Ref. No. EN 14892000 E Copyright British Standards Institution Provided by IHS under license with BSI Not for ResaleNo reproduction or networking permitted without license from IHS --,--,,,,,,,--- Page 2 EN 14892000 BSI 10-2000 CONTENTS Page Foreword3 Introduction3 1Scope4 2Normative references4 3Definitions4 4Materials and surface finishes5 5Design and dimensional requirements6 6Hydraulic tests and requirements7 7Mechanical tests and requirements12 8Acoustic tests and requirements14 9Classification14 10Designation14 11Marking14 ANNEX A INATIVE 16 Copyright British Standards Institution Provided by IHS under license with BSI Not for ResaleNo reproduction or networking permitted without license from IHS --,--,,,,,,,--- w w w . b z f x w . c o m Page 3 EN 14892000 BSI 10-2000 FOREWORD This European Standard has been prepared by Technical Committee CEN/TC 164 “Water supply“, the secretariat of which is held by AFNOR. 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 September 2000, and conflicting national standards shall be withdrawn at the latest by September 2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Annex A of this European Standard is inative. INTRODUCTION In respect of potential adverse effect on the quality of water intended for human consumption, caused by the product covered by this standard a This standard provides no ination as to whether the product may be used without restriction in any of the Member States of the EU or EFTA. b It should be noted that, whilst awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. Copyright British Standards Institution Provided by IHS under license with BSI Not for ResaleNo reproduction or networking permitted without license from IHS --,--,,,,,,,--- w w w . b z f x w . c o m Page 4 EN 14892000 BSI 10-2000 1 SCOPE This European Standard specifies dimensions, materials and perance requirements including s of test for pressure safety valves, of nominal sizes from DN 15 to DN 40, having working pressures1 from 0,1 MPa l bar to 1,0 MPa 10 bar. Pressure safety valves are intended for fitting to the cold water supply of storage water heaters, having a maximum distribution temperature of 95 C, for all energy sources. Pressure safety valves do not control the temperature and alone do not constitute the protection required for storage water heaters. They are not intended to act as expansion valves under normal conditions. NOTE The use of the device specified in this standard does not override the need to use controls e.g. thermostats and cut-outs which act directly on the power sources of water heaters. 2 NORMATIVE REFERENCES This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest addition of the publication referred to applies. EN 1254-2Copper and copper alloys - Plumbing fittings - Part 2 Fittings with compression ends for use with copper tubes. EN 1982Copper and copper alloys - Ingots and castings. EN 12420Copper and copper alloys - Forgings. EN ISO 6509Corrosion of metals and alloys - Determination of dezincification resistance of brass ISO 65091981. ISO 7-11994Pipe threads where pressure-tight joints are made on the threads - Part 1 Dimensions, tolerances and designation. ISO 228-11994Pipe threads where pressure-tight joints are not made on the thread - Part 1 Dimensions, tolerances and designation. ISO 7005-31988Metallic flanges - Part 3 Copper alloy and composite flanges. 3 DEFINITIONS For the purposes of this standard the following definitions apply 3.1 pressure safety valve limits the pressure of the water in the water heater to a predetermined value by discharging water to drain. In case of temperature control failure, it will discharge the energy stored in the water as steam. 3.2 nominal set pressure Pnr is the pressure of the pressure safety valve which is set on production. 3.3 water-tightness pressure Pe is the pressure up to which the pressure safety valve is closed. 1 All pressures are gauge unless otherwise stated. Copyright British Standards Institution Provided by IHS under license with BSI Not for ResaleNo reproduction or networking permitted without license from IHS --,--,,,,,,,--- w w w . b z f x w . c o m Page 5 EN 14892000 BSI 10-2000 3.4 initial opening pressure Pdc a Pdc water is the pressure at which the pressure safety valve opens for the first time, as indicated by the first droplet of water, after a period of storage. b Pdc steam is the pressure at which the pressure safety valve opens for the first time, as indicated by the first appearance of steam at the discharge connection, after a period of storage see figure 1. 3.5 opening pressure Po a Po water is the pressure at which a flow rate of 2,4 litres/hour of water is attained through the pressure safety valve see figure 1. b Po steam is the pressure at which the pressure safety valve opens as indicated by the appearance of steam at the discharge connection of the pressure safety valve see figure 1. 3.6 rating pressure Pdn is the pressure at which the water discharge capacity of the pressure safety valve corresponds to the rated flow see figure 1. 3.7 closing pressure Pf is the pressure at which the pressure safety valve closes after having reached the rating pressure see figure 1. Key 1 Pressure 2 Time Figure 1 - Pressures - see Section 3 Definitions 4 MATERIALS AND SURFACE FINISHES 4.1 General The selection of materials is the responsibility of the manufacturer, provided they satisfy the following requirements a materials and coatings shall not contaminate the drinking water, when in normal or accidental contact, Copyright British Standards Institution Provided by IHS under license with BSI Not for ResaleNo reproduction or networking permitted without license from IHS --,--,,,,,,,--- w w w . b z f x w . c o m Page 6 EN 14892000 BSI 10-2000 b in a technical document, the manufacturer shall state the nature of the materials and coatings used, c materials with inadequate corrosion resistance shall have additional protection, and d the materials used shall not deteriorate at a temperature of 95 C for 1 hour and be suitable under the temperatures specified in the tests in this standard. 4.2 Nature of materials Examples of bronze and brass which may be used, without coating, for manufacturing purposes are given in table 1. Table 1 - Examples of copper alloys Material Designation SymbolReference Number EN Standard Cu Sn 5 Pb 5 Zn 5 - CCC491KEN 1982 Cu Sn 3 Zn 8 Pb 5 - CCC490KEN 1982 Cu Zn 39 Pb 3CW614NEN 12420 Cu Zn 40 Pb 2CW617NEN 12420 Cu Zn 36 Pb 2 AsCZ132- Copper-zinc alloys containing more than 10 zinc are subject to dezincification when ted to water capable of dezincification. In the countries where the use of products made of dezincification resistant materials is required, the products have to guarantee a dezincification depth less than 200 m in any direction, they have to be tested in accordance with the standard EN ISO 6509 and have to be marked in compliance with the indications under section “MARKING“ point 11. 5 DESIGN AND DIMENSIONAL REQUIREMENTS 5.1 General guidance a The pressure safety valve shall be of the type where the spring is isolated from the water by a diaphragm or equivalent. b All sliding elements shall be designed to prevent any risk of seizure, scaling or sticking. c Sliding or rotating parts of the pressure safety valve shall not be in contact with water. d The components controlling the setting of the pressure safety valve shall not be accessible to the end user without damage to the valve. e The pressure safety valve shall be designed so as to make the opening pressure no greater than 1,3 Pnr, and under this pressure, manual lift of the pressure safety valve shall be in conity with the requirements of the tests given in section 6.5.1. f Wing or similar guides of the pressure safety valve shall not be used on the inlet side of the pressure safety valve. g The normal operation of the pressure safety valve shall not be influenced by external forces. h The body of the pressure safety valve shall have two suitable flats to apply a spanner. i If there is only one direction for operation of rotary controls of a pressure safety valve it shall be anticlockwise. Copyright British Standards Institution Provided by IHS under license with BSI Not for ResaleNo reproduction or networking permitted without license from IHS --,--,,,,,,,--- w w w . b z f x w . c o m Page 7 EN 14892000 BSI 10-2000 5.2 Pressures General For set pressures below 0,3 MPa 3 bar the same differential pressures shall be used as for 0,3 MPa 3 bar. EXAMPLE a pressure safety valve with a set pressure of 0,2 MPa 2 bar shall have a rating pressure of Pdn equal to 0,23 MPa 2,3 bar, see figure 1. 5.2.1 Nominal set pressure Pnr The nominal set pressure shall not be greater than 1,0 MPa 10 bar. 5.2.2 Water tightness pressure Pc The water tightness pressure is related to the nominal set pressure Pnr by Pe minimum 0,95 Pnr 5.2.3 Opening pressure Po The opening pressure is related to the nominal set pressure Pnr by Po 1,1 Pnr 5.2.4 Rating pressure Pdn The rating pressure is related to the nominal set pressure Pnr by Pdn 1,2 Pnr 5.2.5 Closing pressure Pf The closing pressure is related to the nominal set pressure Pnr by Pf minimum 0,75 Pnr 5.3 Dimensional characteristics The nominal outlet diameter of the pressure safety valve shall be at least equal to the inlet dimension. 5.3.1 End connections Examples of end connections are given in table 2. 5.3.2 Other connections e.g. unions Connections, other than those specified in section 5.3.1, shall be tested in accordance with section 7.2.3. 5.3.3 Exclusions Connections req