1、BRITISH STANDARD Building valves - Pressure safety valves - Tests and requirements The European Standard EN 1489:2000 has the status of a British standard ICs 91.140.60 NO COPYING WlTHOUT BSI PERMISSION EXCEPT AS PERMITFED BY COPYRIGHT LAW BS EN L489:ZOOO STD-BSI BS EN 1489-ENGL 2000 1624669 0676225
2、 206 m BS EN 1489:2000 This British Standard, having been prepared under the direction of the Sedor Commitke for Builcrg and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 October ZOO0 ISBN O 580 36461 5 National foreword This British Stan
3、dard is the official English language version of EN 1489.2ooO. The UK participation in its preparation was entrusted by Technical Committee B/504, Water supply, to Subcommittee MM, Control and safety devices in drinlng water systems, which has the responsibility to: - aid enquirers to understand the
4、 text; - present to the responsible European committee any enquiries on the - monitor related intemational and European developments and promulgate interpretation, or proposals for change, and keep the UK inter- informed; them in the UK. A list of organizations represented on this subcommittee can b
5、e obtained on request to its secretary. Cross-references The British Standards which implement internationai or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitied “Intemational Standards Correspondence Index”, or by using the “Fi
6、nd” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include al 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
7、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 Amendments issued since publication Comments AmdNo* ID* EUROP
8、EAN STANDARD EN I489 NORME EUROPENNE EUROPISCHE NORM 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 Thi
9、s European Standard was approved by CEN on 3 February 2000. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this Europn Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical reference
10、s concerning sich 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 trawlation under the responsibility of a CEN member into it
11、s own language and notified to the Central Secretariat has the same status as he official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noway, Portugal, Spain,
12、Sweden, Swiherland and United Kingdom. EUROPEAN COMMIITEE FOR STANDARDIZATION EUROPAISCHES KOMITEE FOR NORMUNG COMIT EUROPEN DE NORMALISATION Central Secretariat: rue de Stassart, 36 8-1050 Brussels O 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN nationa
13、l Members. Ref. No. EN 1489:2000 E : STD.BSI BS EN L4S-ENGL 2000 Lb24bb9 087b228 TL5 Page 2 EN 1489:2000 CONTENTS Page Foreword Introduction 1 Scope 2 Normative references 3 Definitions 4 Materials and surface finishes 5 Design and dimensional requirements 6 Hydraulic tests and requirements 7 Mechan
14、ical tests and requirements 8 Acoustic tests and requirements 9 Classification 10 Designation 11 Marking ANNEX A (INFORMATIVE) 3 3 4 4 4 5 6 7 12 14 14 14 14 16 8 BSI 10-2000 FOREWORD This European Standard has been prepared by Technical Committee CENEC 164 “Water supply“, the secretariat of which i
15、s 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 CENKENELEC
16、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, Switzer
17、land and the United Kingdom. Annex A of this European Standard is informative. 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 information as to whether the produc
18、t 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. 0 BSI 10-2000 w.- ST
19、D-BSI - BS EN 1487-ENGL 2000 I lb24bb9 0876230 673 Page 4 EN 1489:2000 1 SCOPE This European Standard specifies dimensions, materials and performance requirements (including methods of test) for pressure safety valves, of nominal sizes fi-om DN 15 to DN 40, having working pressures) fi-om O, 1 MPa (
20、1 bar) to 1 ,O MPa (1 O bar). Pressure safety valves are intended for fitting to the cold water supply of storage water heaters, having a maximum distribution temperature of 95 OC, for all energy sources. Pressure safety valves do not control the temperature and alone do not constitute the protectio
21、n 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.
22、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 revis
23、ions 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 1254-2 Copper and copper alloys - Plumbing fittings - Part 2: Fittings with compression ends
24、for use with copper tubes. EN 1982 EN 12420 Copper and copper alloys - Ingots and castings. Copper and copper alloys - Forgings. EN IS0 6509 Corrosion of metals and alloys - Determination of dezincification resistance of brass (IS0 6509:1981). Pipe threads where pressure-tight joints are made on the
25、 threads - Part 1: Dimensions, tolerances and designation. Pipe threads where pressure-tight joints are not made on the thread - Part 1 : Dimensions, tolerances and designation. Metallic flanges - Part 3: Copper alloy and composite flanges. IS0 7-1: 1994 IS0 228- 1 1994 IS0 7005-3:1988 3 DEFINITIONS
26、 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
27、. 3.2 nominal set pressure (I“,.) 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. I) All pressures are gauge unless otherwise stated. O BSI 10-2000 STD.BSI BS EN L48S-ENGL 2000
28、 Lb24bbS 087b23& 50“ Page 5 EN 1489:2000 3.4 initial opening pressure (Ide): 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 indicated by the first appearance of steam at the disch
29、arge connection, after a period of storage (see figure 1). is the pressure at which the pressure safety valve opens for the first time, as 3.5 opening pressure (Po): a) Po water is the pressure at which a flow rate of 2,4 litreshour of water is attained through the pressure safety valve (see figure
30、1). b) Po appearance of steam at the discharge connection of the pressure safety valve (see figure 1). is the pressure at which the pressure safety valve opens as indicated by the 3.6 rating pressure (Idn) is the pressure at which the water discharge capacity of the pressure safety valve corresponds
31、 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). I 21 - Key 1) Pressure 2) Time Figure 1 - Pressures - see Section 3 Definitions 4 MATERIALS AND SURFACE FINISHES 4.1 General
32、 The selection of materials is the responsibility of the manufacturer, provided they satis the following requirements: a) materials and coatings shall not contaminate the drinking water, when in normal or accidental contact, O BSI 10-2000 STD-BSI ES EN L489-ENGL 2000 E Lb24bb7 0876232 446 EI Page 6
33、EN 1489:2000 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 suitabl
34、e 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 Copper-zinc alloys containing more than 10 % zinc are subjec
35、t to dezincification when submitted 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 pm in any direction, they have to be tested in accordance
36、with the standard EN IS0 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 equiva
37、lent. 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
38、 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 Pm, and under this pressure, manual lift of the pressure safety valve shall be in conformity with the requirements of the tests given in section 6.5.1. f) Wing or
39、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)
40、 If there is only one direction for operation of rotary controls of a pressure safety valve it shall be anticlockwise. Q 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 w
41、ith a set pressure of 0,2 MPa (2 bar) shall have a rating pressure ofPd, 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 ,O MPa (1 O bar). 5.2.2 Water tightness pressure (Pc) The water tightness pressure is related to t
42、he nominal set pressure (Pm) by: 5.2.3 Opening pressure (Po) fe minimum = 0395 f“ The opening pressure is related to the nominal set pressure (Pnr) by: P*= 1,l Pm 5.2.4 Rating pressure (Pdn) The rating pressure is related to the nominal set pressure (Pnr) by: 5.2.5 Closing pressure (Pf ) The closing
43、 pressure is related to the nominal set pressure (Pm) by: 5.3 Dimensional characteristics ph = 192 PM Pfminimurn = 0975 Pm 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.
44、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 requiring the use of heat to make or break the joint (e.g. capillary) are not permitted. 6 HYDRAULIC TESTS AND REQUIREMENTS 6
45、.1 Tolerances Unless otherwise specified, all tolerances shall be *5 %. Q BSI 10-2000 STD.BSI BS EN L489-ENGL 2000 Lb24bb9 087b234 239 Page 8 EN 1489:2000 Table 2 - Examples of end connections and nominal sizes ON) DN 32 DN 40 DN 15 DN 20 DN 25 Rp 1 % Rp ?4 Rp 1 /2 I a) Internal thread to IS0 7-1 :
46、1994 R!h R% R1 Rl% Rl% b) External taper thread to IS0 7-11994 G %B G1B Gl%B %B Gl%B G c) Flat faced external thread to I IS0 228-11994 G%B G%B GIB Gl%B Gl%B d) External thread with shoulder to IS0 228-1 : 1994 15/18 22 28 35 42 e) Compression fitting for copper pipe to EN 1254-2 95 75 14 1 o5 75 14
47、 115 85 14 140 1 O0 18 150 110 18 I f) Flange to IS0 7005-3:1988 )reference dimension 8 BSI 10-2000 STD-BSI BS EN 3489-ENGL 2000 W Lb24bb 0876235 355 Page 9 EN 1489:2000 6.2 Cold water pressure tests 6.2.1 General The pressure safety valve shall be stored, in the closed position, at ambient temperat
48、ure for a minimum of 8 days before commencing tests. Connect the pressure safety valve by its water heater connection to a test apparatus having water at ambient temperature (maximum 25 OC). 6.2.2 Water tightness pressure test (P,) Procedure: Increase the pressure until the pressure safety valve ope
49、ns. Requirement: The opening pressure of the pressure safety valve shall be in the range Pe to Ph. Procedure: Decrease the pressure to 0,4 Pw Increase the pressure to 0,95 P, (tightness pressure) for a period of 120 S. Requirement: The pressure safety valve shall be water tight for a period of 120 s. 6.2.3 Nominal opening flow pressure (Po) test Procedure: Increase the water pressure until a flow rate of 2,4 litreshour is achieved. Record this as opening pressure Po. Requirement: Po shall not be greater than 1,05 Pnr. 6.2.4 Nominal rating pressure (Pd,) t
