1、DEUTSCHE NORM June 2000 Building valves - Pressure safety valves English version of DIN EN 1489 Tests and requirements DIN - EN 1489 ICs 91.1 40.60 Gebudearmaturen - Sicherheitsventile - Prfungen und Anforderungen European Standard EN 1489 : 2000 has the status of a DIN Standard. A comma is used as
2、the decimal marker. This standard has been included in the body of Codes of practice for water issued by the DVGW Deutscher Verein des Gas- und Wasserfaches e.V. (German Association of Gas and Water Engineers). National foreword This standard has been prepared by CEN/TC 164. The responsible German b
3、ody involved in its preparation was the Normenausschuss Armaturen (Valves Standards Committee), Technical Committee Gebaudearmaturen fr die Wasserversorgung. DIN 2999-1 and DIN IS0 228-1 are the standards corresponding to International Standards IS0 7-1 and IS0 228-1, respectively, referred to in cl
4、ause 2 of the EN. National Annex NA Standard referred to (and not included in Normative references) DIN 2999-1 Pipe threads for tubes and fittings - Parallel internal threads and taper external threads - Thread dimensions EN comprises 16 pages. No pari of this standard may be reproduced without the
5、prior permission of V Deutsches Institut fur Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, s the exclusive right of sale for German Standards (DIN-Normen). Ref. No. DIN EN 1489 : 2000-0 English price group 11 Sales No. 11 11 10.00 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM
6、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 - Sicherheits- ventile - Prfungen und Anforderungen This European Standard was approved by CEN on 20
7、00-02-03. CEN members are bound to comply with the CENKENELEC 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 stand- ards may be ob
8、tained on application to the Central Secretariat or to any CEN member. The European Standards exist 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 Sec
9、retariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republik, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United
10、Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 2000. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN 14
11、89: 2000 E Page 2 EN 1489 : 2000 CONTENTS Foreword Page 2 Introduction 1 Scope 2 Normative references 3 Definitions 4 Materials and surface finishes 5 Design and dimensional requirements 6 Hydraulic tests and requirements 7 Mechanical tests and requirements 8 Acoustic tests and requirements 9 Classi
12、fication 10 Designation Il Marking Annex A (informative) 2 3 3 3 4 5 6 Il 13 13 13 13 15 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 stand
13、ard, 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 Internal Regulations, the national standards organizations of the following countries
14、 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 informative. INTROD
15、UCTION 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 ERA. b) It
16、 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. Page 3 EN 1489 : 2000 1 SCOPE This European Standard specifies, dimensions, materials and performance requ
17、irements (including methods of test) for pressure safety valves, of nominal sizes from DN 15 to DN 40, having working pressures) from 0,l MPa (1 bar) to 1,O MPa (10 bar). Pressure safety valves are intended for fitting to the cold water supply of storage water heaters, having a maximum distribution
18、temperature of 95 OC, 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
19、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
20、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 add
21、ition of the publication referred to applies. EN 1254-2 EN 1982 EN 12420 EN IS0 6509 IS0 7-1 : 1994 IS0 228-1:1994 IS0 7005-31988 3 DEFINITIONS Copper and copper alloys - Plumbing fittings - Part 2: Fittings with compression ends for use with copper tubes. Copper and copper alloys - Ingots and casti
22、ngs Copper and copper alloys - Forgings Corrosion of metals and alloys - Determination of dezincification resistance of brass (IS0 6509 : 1981) Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances and designation. Pipe threads where pressure-tight joints
23、are not made on the thread - Part 1 : Dimensions, tolerances and designation. Metallic flanges - Part 3 : Copper alloy and composite flanges. 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 predete
24、rmined 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 produc tion. 3.3 water-tightness pressure (P,) is the pressure up
25、 to which the pressure safety valve is closed. ) All pressures are gauge unless otherwise stated Page 4 EN 1489 : 2000 3.4 initial opening pressure (Pdc) a) Pdc water is the pressure at which the pressure safety valve opens for the fust time, as indicated by the fust droplet of water, after a period
26、 of storage. b) P dc 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) P, water is the pressure at which a flow rate of 2,4 l
27、itrehour of water is attained through the pressure safety valve (see figure 1). b) P, 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 (PdJ is the pressure at
28、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). 21 - Key 1) Pressure 2) Time Figure 1 - Pressures
29、 (see clause 3) 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. b) in a techn
30、ical document, the manufacturer shall state the nature of the materials and coatings used, Page 5 EN 1489 : 2000 Material designation CC49 1 K CC490K Symbol Reference number Cu Sn 5 Pb 5 Zn 5 - C Cu Sn 3 Zn 8 Pb 5 - C c) materials with inadequate corrosion resistance shall have additional protection
31、, and EN Standard EN 1982 EN 1982 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. 1 Cu Zn 39 Pb 3 CW614N EN 12420 Cu Zn 40 Pb 2 CW617N EN 12420 Cu Zn 36 Pb 2 As CZ132 - 4.2 Nature of mate
32、rials 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 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 t
33、he 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 s
34、hall not be accessible to the end user without damage to the valve. e) The pressure safety valve shall be designed as to make the opening pressure no greater than 1,3 P, and under this pressure, manual lift of the pressure safety valve shall be in conformity with the requirements of the tests given
35、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
36、 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. 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). Page 6 EN 1489 : 20
37、00 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 wate
38、r tightness pressure is related to the nominal set pressure (Pnr) by: Pe minimum = 0995 Pnr- 5.2.3 Opening pressure (Po) The opening pressure is related to the nominal set pressure (PnJ by: Po = 1,l Pn, 5.2.4 Rating pressure (Pd,) The rating pressure is related to the nominal set pressure (Pnr) by:
39、Pd“ = 1,2 P“r. 5.2.5 Closing pressure (Pf) The closing pressure is related to the nominal set pressure (Pnr) by: Pf minimum = 0775 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 Exampl
40、es 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 requiring the use of heat to make or break the joint (e.g. capillary) are not per
41、mitted. 6 HYDRAULIC TESTS AND REQUIREMENTS 6.1 Tolerances Unless otherwise specified, all tolerances shall be f 5%. Page 7 EN 1489 : 2000 Table 2 - Examples of end connections and nominal sizes (DN) DN 15 DN 20 DN 25 DN 32 Rp 1 114 DN 40 Rp 1 112 Rp 112 Rp 314 a) Internal thread to IS0 7-1 : 1994 R
42、112 R 3/4 RI R 1 114 R 1 112 b) External taper thread to IS0 7-1:1994 G 3/4 B GIB 1/4 B 112 B G 1 314 B G G c) Flat faced external thread to IS0 228- 1: 1994 G 1/2 B G 314 B GIB S 1 114 B G 1 1/2 B d) External thread with shoulder to IS0 228-1:1994 15/18 22 28 35 42 e) Compression fitting for copper
43、 pipe to EN 1254-2 95 75 14 105 75 14 115 85 14 140 1 O0 18 150 110 18 - f) Flange to IS0 7005-3:1988 1) reference dimension Page 8 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 temperature for a minimum of 8
44、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 opens. Requirement: The op
45、ening pressure of the pressure safety valve shall be in the range P, to Pdn. Procedure: Decrease the pressure to 0,4 Pnr. 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 open
46、ing flow pressure (Po) test Procedure: Increase the water pressure until a flow rate of 2,4 litrehour is achieved. Record this as opening pressure Po. Requirement: Po shall not be greater than 1,05 Pnp 6.2.4 Nominal rating pressure (Pdn) test Procedure: Increase the flow rate to the appropriate valu
47、e given in table 3 and measure the pressure. Requirement: The pressure determined shall not be greater than 1,2 Pnr. Page 9 EN 1489 : 2000 Table 3 - Discharge flow rate values 6.2.5 Closing pressure (Pf) test Procedure: Decrease the pressure to 0,4 Pnp Increase the pressure to 1,l Pnr (opening press
48、ure). Decrease the pressure to 0,75 Pnr. Requirement: There shall be no leakage or discharge from the pressure safety valve for a period of 300 s. 6.2.6 Repeat tests Procedure: Repeat the tests in sections 6.2.2 to 6.2.5 using the same pressure safety valve to give a total of three determinations of
49、 each parameter. Requirement: Each determination shall meet the stated requirements in sections 6.2.2 to 6.2.5. 6.3 Steam flow rate test This is a destructive test. The pressure safety valve subjected to the test shall not be used in other tests. Procedure: 1. Connect the pressure safety valve by its water heater connection to a test apparatus supplying saturated steam. 2. Raise the pressure until the pressure safety valve just opens. Requirement: the opening pressure shall be between P, and 1,2 Pnr. 3. Reduce the pressure to O Mpa. Page 1 O EN 1489 : 2000 4. Raise the pre
