1、 ISO 2012 Fire protection Automatic sprinkler systems Part 2: Requirements and test methods for wet alarm valves, retard chambers and water motor alarms Protection contre lincendie Systmes dextinction automatiques du type sprinkler Partie 2: Exigences et mthodes dessai des soupapes dalarme hydrauliq
2、ues, des limiteurs de surpression et des dispositifs dalarme moteur hydraulique INTERNATIONAL STANDARD ISO 6182-2 Third edition 2012-12-01 Reference number ISO 6182-2:2012(E) ISO 6182-2:2012(E)ii ISO 2012 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2012 All rights reserved. Unless otherwise
3、 specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright off
4、ice Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 6182-2:2012(E) ISO 2012 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Requir
5、ements 3 4.1 Nominal sizes . 3 4.2 Connections . 3 4.3 Rated working pressure 3 4.4 Bodies and covers . 3 4.5 Strength (see 6.9) . 4 4.6 Access for maintenance . 4 4.7 Components . 4 4.8 Leakage (see 6.8) 5 4.9 Non-metallic components (excluding gaskets, seals and other elastomeric parts) (see 6.4 a
6、nd 6.5) 5 4.10 Sealing assembly elements (see 6.3) 5 4.11 Clearances . 5 4.12 Hydraulic friction loss (see 6.7) . 7 4.13 Endurance (see 6.6) 8 4.14 Operational performance (see 6.10) 8 4.15 Drains 9 4.16 Alarms (see 6.10.2) . 9 4.17 Retard device (see 6.12) . 9 4.18 Water motor alarms (see 6.11) 10
7、5 Production testing and quality control 11 6 Tests 12 6.1 Samples 12 6.2 Spring and diaphragm test 12 6.3 Sealing element tests (see 4.10) .12 6.4 Warm water aging test for non-metallic components (excluding gaskets and seals and other elastomeric parts) (see 4.9) .14 6.5 Air aging test for non-met
8、allic components (excluding gaskets and seals and other elastomeric parts) (see 4.9) 14 6.6 Endurance test (see 4.13) .15 6.7 Hydraulic friction loss test (see 4.12) 15 6.8 Valve leakage and deformation tests (see 4.8) .15 6.9 Body strength test (see 4.5) 16 6.10 Operational test (see 4.14) 16 6.11
9、Water motor alarm tests (see 4.16) .17 6.12 Retard chamber tests (see 4.17) .18 6.13 Salt mist corrosion test .18 7 Marking .18 8 Manufacturers installation instructions .19 Annex A (normative) Tolerances .20 ISO 6182-2:2012(E) Foreword ISO (the International Organization for Standardization) is a w
10、orldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented
11、on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafte
12、d in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Stand
13、ard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 6182-2 was prepared b
14、y Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 5, Fixed firefighting systems using water. This third edition cancels and replaces the second edition (ISO 6182-2:2005), which has been technically revised. ISO 6182 consists of the following parts, und
15、er the general title Fire protection Automatic sprinkler systems: Part 1: Requirements and test methods for sprinklers Part 2: Requirements and test methods for wet alarm valves, retard chambers and water motor alarms Part 3: Requirements and test methods for dry pipe valves Part 4: Requirements and
16、 test methods for quick-opening devices Part 5: Requirements and test methods for deluge valves Part 6: Requirements and test methods for check valves Part 7: Requirements and test methods for early suppression fast response (ESFR) sprinklers Part 8: Requirements and test methods for pre-action dry
17、alarm valves Part 9: Requirements and test methods for water mist nozzles Part 10: Requirements and test methods for domestic sprinklers Part 11: Requirements and test methods for pipe hangers Part 12: Requirements and test methods for grooved-end components for steel pipe systemsiv ISO 2012 All rig
18、hts reserved INTERNATIONAL ST ANDARD ISO 6182-2:2012(E) Fire protection Automatic sprinkler systems Part 2: Requirements and test methods for wet alarm valves, retard chambers and water motor alarms 1 Scope This part of ISO 6182 specifies performance, requirements, methods of test and marking requir
19、ements, for wet alarm valves, retard chambers, water motor alarms and manufacturers specified relevant trim used in wet pipe automatic fire protection systems. This part of ISO 6182 is not applicable to performance and test requirements for other auxiliary components or attachments to alarm valves.
20、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 referenced document (including any amendments) applies. ISO 898-1, Mechanical prop
21、erties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread ISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel Part 2: Nuts with specified property classes Coarse thread a
22、nd fine pitch thread 3 T erms an d definiti ons For the purposes of this document, the following terms and definitions apply. 3.1 alarm device mechanical or electrical device which sounds an alarm upon operation of the valve 3.2 clapper type of sealing assembly NOTE See also 3.13. 3.3 compensator ex
23、ternal or internal device such as an auxiliary valve that minimizes false alarms caused by a small increase of service pressure 3.4 corrosion-resistant material bronze, brass, Monel metal, austenitic stainless steel, or equivalent metallic or plastic material conforming with the requirements of this
24、 part of ISO 6182 NOTE Monel is an example of a suitable product available commercially. This information is given for the convenience of users of this part of ISO 6182 and does not constitute an endorsement by ISO of this product. ISO 2012 All rights reserved 1 ISO 6182-2:2012(E) 3.5 f low v el o c
25、 it y speed of water flow through a valve expressed as the equivalent water velocity through a pipe of the same nominal size as the valve 3.6 minimum opening pressure the minimum pressure when water begins to pass through the valve 3.7 rated working pressure maximum service pressure at which a valve
26、 or retard chamber is intended to operate 3.8 ready (set) condition state of a valve with the sealing assembly in the closed or set position with service and system pressure applied 3.9 reinforced elastomeric element element of clapper, clapper assembly or seat seals in a composite of an elastomeric
27、 compound with one or more other components 3.10 retard chamber volumetric type of retard device designed to minimize false alarms caused by surges and fluctuations in sprinkler system water supplies 3.11 retard device pneumatic, hydraulic or electric timer designed to minimize false alarms caused b
28、y surges and fluctuations in sprinkler system water supplies 3.12 retard time difference in time for actuation of alarm devices, measured from the passage of water through the wet alarm valve port, with and without the retard chamber 3.13 sealing assembly main movable sealing element (such as a clap
29、per) of the valve which prevents the reverse flow of water 3.14 sealing assembly seat ring main fixed sealing element of a valve which prevents the reverse flow of water 3.15 sensitivity minimum rate of flow from a system outlet which will open the wet alarm valve, as indicated by satisfactory opera
30、tion of alarms 3.16 service pressure static water pressure at the inlet to a valve when the valve is in the ready condition 3.17 system pressure static water pressure at the main outlet of a valve when the valve is in the ready condition2 ISO 2012 All rights reserved ISO 6182-2:2012(E) 3.18 trim ext
31、ernal equipment and pipework, excluding the main installation pipework, fitted to the valve 3.19 waste of water discharge of any water from the alarm port of a valve that is in the ready condition 3.20 water motor alarm hydraulically actuated device which provides a local audible alarm as a result o
32、f a flow through an alarm valve 3.21 wet alarm valve valve that permits flow of water into a wet sprinkler system, prevents the reverse flow of water and incorporates provision for actuation of an alarm under specified flow conditions 3.22 wet pipe system automatic fire protection system in which th
33、e piping contains water and is connected to a water supply so that water discharges upon operation of the sprinklers 4 Requirements 4.1 Nominal sizes The nominal size of a valve shall be the nominal diameter of the inlet and outlet connections, i.e. the pipe size for which the connections are intend
34、ed. Sizes shall be 40 mm, 50 mm, 65 mm, 80 mm, 100 mm, 125 mm, 150 mm, 200 mm or 250 mm. The diameter of the waterway through the sealing assembly seat ring shall be permitted to be less than the nominal size. 4.2 Connections 4.2.1 All connections shall be designed for use at the rated working press
35、ure of the valve. 4.2.2 The dimensions of all connections shall conform with the applicable requirements of International Standards. If International Standards are not applicable, National standards shall be permitted to be used. 4.2.3 An opening not smaller than 15 mm nominal diameter shall be prov
36、ided for a water motor alarm line connection. 4.3 Rated working pressure 4.3.1 The rated working pressure shall be not less than 1,2 MPa (12 bar). 4.3.2 Inlet and outlet connections shall be permitted to be machined for lower working pressures to match installation equipment provided the valve is ma
37、rked with the lower working pressure. See 7.3 f). 4.4 Bodies and covers 4.4.1 The body and cover shall be made of a material having corrosion resistance at least equivalent to cast iron. ISO 2012 All rights reserved 3 ISO 6182-2:2012(E) 4.4.2 Cover fasteners shall be made of steel, stainless steel,
38、titanium, or other materials with equivalent physical and mechanical properties. 4.4.3 Non-metallic materials other than gaskets, diaphragms and seals or metals with a melting point less than 800 C shall not form part of the valve body or cover. 4.4.4 It shall not be possible to assemble the valve w
39、ith the cover plate in a position which either improperly indicates flow direction or prevents proper operation of the valve. 4.5 Strength (see 6.9) 4.5.1 An assembled valve, with the sealing assembly blocked open, shall withstand, without rupture, an internal hydrostatic pressure of four times the
40、rated working pressure for a period of 5 min, when tested as specified in 6.9. 4.5.2 If the test in accordance with 6.9 is not done with standard production fasteners, the supplier shall provide documentation showing that the calculated design load of any standard production fastener, neglecting the
41、 force required to compress the gasket, does not exceed the minimum tensile strength specified in ISO 898-1 and ISO 898-2 when the valve is pressurized to four times the rated working pressure. The area of the application of pressure shall be calculated as follows. a) If a full-face gasket is used,
42、the area of application of pressure is that extending out to a line defined by the inner edge of the bolts. b) If an “O”-ring seal or ring gasket is used, the area of application of force is that extending out to the centre line of the “O”-ring or gasket. 4.6 Access for maintenance Means shall be pr
43、ovided to permit access to working parts and removal of the sealing assembly. Any method adopted shall permit ready maintenance by one person with a minimum of down time. 4.7 Components 4.7.1 Any component which is normally disassembled during servicing shall be designed so that it cannot be reassem
44、bled improperly without providing an external visual indication, when the valve is returned to service. 4.7.2 With the exception of valve seats, all parts intended for field replacement shall be capable of being disassembled and reassembled using tools normally employed by the trade. 4.7.3 All compo
45、nents shall be non-detachable during normal operation of the valve. 4.7.4 Failure of the sealing assembly diaphragms or seals shall not prevent the valve from opening. 4.7.5 Sealing surfaces of sealing assemblies, including the sealing assembly seat ring, shall have corrosion resistance equivalent t
46、o brass or bronze and have sufficient width of surface contact to withstand ordinary wear and tear, rough usage, compression stresses and damage due to pipe scale or foreign matter carried by the water. 4.7.6 Springs and diaphragms shall not fracture or rupture, when tested in accordance with 6.2. 4
47、.7.7 There shall be no sign, on visual examination, of damage to the sealing assembly after testing for the operational requirements of 4.14 in accordance with 6.10.4 ISO 2012 All rights reserved ISO 6182-2:2012(E) 4.7.8 When wide open, the sealing assembly shall bear against a definite stop. The po
48、int of contact shall be located so that impact or reaction of the water flow will not permanently twist, bend or fracture valve parts. 4.7.9 Where rotation or sliding motion is required, the part or its bearing shall be made of a corrosion resistant material. Materials lacking corrosion resistance s
49、hall be fitted with bushings, inserts or other parts made of corrosion resistant materials at those points where freedom of movement is required. 4.7.10 The sealing assembly shall close towards the seat when water flow ceases. Springs shall be permitted to ensure full and proper seating. 4.8 Leakage (see 6.8) 4.8.1 There shall be no leakage, permanent distortion or rupture of a valve when an internal pressure of twice the rated working pressure is applied for 5 min with the sealing assembly open in accor
