BS EN 1489-2000 Building valves - Pressure safety valves - Tests and requirements《建筑物阀门 安全阀 试验和要求》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1489:2000 The Europ

2、ean Standard EN 1489:2000 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 requirementsThis British Standard, having been prepared under the direction of the Sector Committee for

3、 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 1489:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard is the official Eng

4、lish language version of EN 1489:2000. 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 th

5、e responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on reques

6、t 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

7、 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. Summ

8、ary 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.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1489 March 2000 ICS 91.14

9、0.60 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 a

10、re 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

11、 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 s

12、tatus 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 STAN

13、DARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1489:2000 EPage 2 EN 1489:2000 BSI 10-2000 CONT

14、ENTS Page Foreword 3 Introduction 3 1 Scope 4 2 Normative references 4 3 Definitions 4 4 Materials and surface finishes 5 5 Design and dimensional requirements 6 6 Hydraulic tests and requirements 7 7 Mechanical tests and requirements 12 8 Acoustic tests and requirements 14 9 Classification 14 10 De

15、signation 14 11 Marking 14 ANNEX A (INFORMATIVE) 16Page 3 EN 1489:2000 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, e

16、ither 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

17、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 informative. INTRODUCTIO

18、N 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 product may be used without restriction in any of the Member States of the EU or EFTA. b) It sho

19、uld 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.Page 4 EN 1489:2000 BSI 10-2000 1 SCOPE This European Standard specifies dimensions, materials and performance

20、requirements (including methods of test) for pressure safety valves, of nominal sizes from DN 15 to DN 40, having working pressures 1) 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 distrib

21、ution 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 t

22、his 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

23、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

24、 addition of the publication referred to applies. EN 1254-2 Copper and copper alloys - Plumbing fittings - Part 2: Fittings with compression ends for use with copper tubes. EN 1982 Copper and copper alloys - Ingots and castings. EN 12420 Copper and copper alloys - Forgings. EN ISO 6509 Corrosion of

25、metals and alloys - Determination of dezincification resistance of brass (ISO 6509:1981). ISO 7-1:1994 Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances and designation. ISO 228-1:1994 Pipe threads where pressure-tight joints are not made on the thread

26、 - Part 1: Dimensions, tolerances and designation. ISO 7005-3:1988 Metallic 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 prede

27、termined 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 (P nr ) is the pressure of the pressure safety valve which is set on production. 3.3 water-tightness pressure (P e ) is the pressu

28、re up to which the pressure safety valve is closed.1)All pressures are gauge unless otherwise stated.Page 5 EN 1489:2000 BSI 10-2000 3.4 initial opening pressure (P dc ): a) P dc wateris the pressure at which the pressure safety valve opens for the first time, as indicated by the first droplet of wa

29、ter, after a period of storage. b) P dc steamis 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 (P o ): a) P o wateris the pressure at w

30、hich a flow rate of 2,4 litres/hour of water is attained through the pressure safety valve (see figure 1). b) P o steamis 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

31、pressure (P dn ) 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 (P f ) is the pressure at which the pressure safety valve closes after having reached the rating pressure (see figure 1). Key 1) Pres

32、sure 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

33、in normal or accidental contact,Page 6 EN 1489:2000 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

34、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 D

35、esignation Symbol Reference Number EN Standard Cu Sn 5 Pb 5 Zn 5 - C CC491K EN 1982 Cu Sn 3 Zn 8 Pb 5 - C CC490K EN 1982 Cu Zn 39 Pb 3 CW614N EN 12420 Cu Zn 40 Pb 2 CW617N EN 12420 Cu Zn 36 Pb 2 As CZ132 - Copper-zinc alloys containing more than 10 % zinc are subject to dezincification when submitte

36、d 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 h

37、ave 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

38、 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.

39、e) The pressure safety valve shall be designed so as to make the opening pressure no greater than 1,3 P nr , 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 similar guides of the pressure s

40、afety 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

41、for operation of rotary controls of a pressure safety valve it shall be anticlockwise.Page 7 EN 1489:2000 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 press

42、ure of 0,2 MPa (2 bar) shall have a rating pressure of P dnequal to 0,23 MPa (2,3 bar), see figure 1. 5.2.1 Nominal set pressure (P nr) The nominal set pressure shall not be greater than 1,0 MPa (10 bar). 5.2.2 Water tightness pressure (P c ) The water tightness pressure is related to the nominal se

43、t pressure (P nr ) by: P e minimum= 0,95 P nr 5.2.3 Opening pressure (P o) The opening pressure is related to the nominal set pressure (P nr ) by: P o= 1,1 P nr 5.2.4 Rating pressure (P dn) The rating pressure is related to the nominal set pressure (P nr ) by: P dn= 1,2 P nr 5.2.5 Closing pressure (

44、P f) The closing pressure is related to the nominal set pressure (P nr ) by: P f minimum= 0,75 P nr 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

45、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 requiring the use of heat to make or break the joint (e.g. capillary) are not permitted. 6 HYDRAULIC TESTS AND REQUI

46、REMENTS 6.1 Tolerances Unless otherwise specified, all tolerances shall be 5 %.Page 8 EN 1489:2000 BSI 10-2000 Table 2 - Examples of end connections and nominal sizes (DN) Type 1) DN 15 DN 20 DN 25 DN 32 DN 40 a) Internal thread to ISO 7-1:1994 d Rp Rp Rp 1 Rp 1 Rp 1 b) External taper thread toISO 7

47、-1:1994 d R R R 1 R 1 R 1 c) Flat faced external thread to ISO 228-1:1994 d G B G 1 B G 1 B G 1 B G 1 B d) External thread with shoulder to ISO 228-1:1994 d G B G B G 1 B G 1 B G 1 B e) Compression fitting for copper pipe to EN 1254-2 d 15/18 22 28 35 42 f) Flange to ISO 7005-3:1988 D d K 95 75 14 1

48、05 075 014 115 085 014 140 100 018 150 110 018 1) reference dimensionPage 9 EN 1489:2000 BSI 10-2000 6.2 Cold water pressure tests 6.2.1 General The pressure safety valve shall be stored, in the closed position, at ambient temperature for a minimum of 8 days before commencing tests. Connect the pres

49、sure safety valve by its water heater connection to a test apparatus having water at ambient temperature (maximum 25 C). 6.2.2 Water tightness pressure test (P e) Procedure: Increase the pressure until the pressure safety valve opens. Requirement: The opening pressure of the pressure safety valve shall be in the range P eto P dn . Procedure: Decrease the pressure to 0,4 P nr . Increase the pressure to 0,95 P nr(tightness pressure) for a period of 120 s. Requirement: The pressure safety valve shall be water tight for a