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1、 Reference number ISO 6182-6:2006(E) ISO 2006 INTERNATIONAL STANDARD ISO 6182-6 First edition 2006-03-01 Fire protection Automatic sprinkler systems Part 6 Requirements and test methods for check valves Protection contre lincendie Systmes dextinction automatiques du type sprinkler Partie 6: Exigence
2、s et mthodes dessai des postes de contrle Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 19:45:00 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6
3、182-6:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloadi
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6、 below. ISO 2006 All rights reserved. Unless otherwise 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 b
7、ody in the country of the requester. ISO copyright office 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 ii ISO 2006 All rights reserved Copyright International Organization for Standardization Provided
8、by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 19:45:00 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6182-6:2006(E) ISO 2006 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normat
9、ive references. 1 3 Terms and definitions. 1 4 Requirements 3 5 Production testing and quality control. 8 6 Tests. 8 7 Marking 12 8 Instruction chart 13 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not
10、for Resale, 04/19/2007 19:45:00 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6182-6:2006(E) iv ISO 2006 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). T
11、he 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 on that committee. International organizations, governmental and non-go
12、vernmental, 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 drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
13、 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 Standard requires approval by at least 75 % of the member bodies casting a v
14、ote. 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 6182-6 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire
15、 fighting, Subcommittee SC 5, Fixed firefighting systems using water. ISO 6182 consists of the following parts, under 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
16、 chambers and water motor alarms Part 3: Requirements and test methods for dry pipe valves Part 4: Requirements and 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 meth
17、ods for early suppression fast response (ESFR) sprinklers Part 8: Requirements and test methods for pre-action dry 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
18、hangers Part 12: Requirements and test methods for grooved end pipe couplings Part 13: Requirements and test methods for extended coverage sprinklers Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for
19、 Resale, 04/19/2007 19:45:00 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6182-6:2006(E) ISO 2006 All rights reserved v Introduction This part of ISO 6182 is one of a number of ISO International Standards prepared by ISO/TC 21 covering components for automatic sprink
20、ler systems, including the following: a) carbon dioxide systems (ISO 6183), b) explosion suppression systems (ISO 6184), An International Standard covering foam systems is planned. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical
21、 Standards 1/9972545001 Not for Resale, 04/19/2007 19:45:00 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2
22、007 19:45:00 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 6182-6:2006(E) ISO 2006 All rights reserved 1 Fire protection Automatic sprinkler systems Part 6: Requirements and test methods for check valves 1 Scope This part of ISO 6182 specifies p
23、erformance requirements, methods of test and marking requirements for check valves used in automatic fire protection systems. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For un
24、dated references, the latest edition of the referenced document (including any amendments) applies. ISO 7-1, Pipe threads where pressure-tight joints are made on the threads Part 1: Designation, dimensions and tolerances ISO 37, Rubber, vulcanized or thermoplastic Determination of tensile stress-str
25、ain properties ISO 188, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests ISO 8981, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs ISO 8982, Mechanical properties of fasteners Part 2: Nuts with specified proof lo
26、ad values Coarse thread 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 check valve valve that permits flow of water in one direction and prevents the flow of water in the reverse direction NOTE These valves are manufactured with pipe connect
27、ions or may be of the wafer type. 3.2 clapper type of sealing element NOTE See 3.8. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 19:45:00 MDTNo reproduction or networking perm
28、itted without license from IHS -,-,- ISO 6182-6:2006(E) 2 ISO 2006 All rights reserved 3.3 corrosion-resistant material bronze, brass, Monel1) metal, austenitic stainless steel, or equivalent, or plastic material conforming with the requirements of this document 3.4 flow velocity speed of water flow
29、 through a valve expressed as the equivalent water velocity through a pipe of the same nominal size as the valve 3.5 rated working pressure maximum service pressure at which a valve is intended to operate 3.6 ready condition set condition state of a valve with the sealing assembly in the closed or s
30、et position with service and system pressure applied 3.7 reinforced elastomeric element element of clapper, clapper assembly or seat seals in a composite of an elastomeric compound with one or more other components 3.8 sealing assembly main movable sealing element (such as a clapper) of the valve, w
31、hich prevents the reverse flow of water and which maintains air pressure in the system piping 3.9 sealing assembly seat ring main fixed sealing element of a valve which prevents the reverse flow of water and which maintains air pressure in the system piping 3.10 service pressure static water pressur
32、e at the inlet to a valve when the valve is in the ready condition 3.11 wafer check valve valve having outside body and end connection dimensions that are less than the inside diameter of the bolt pattern of flanges of the same nominal size NOTE One set of flange studs long enough to span the valve
33、is used to clamp the wafer check valve between the mating pipe flanges. 1) 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. Copyright Intern
34、ational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 19:45:00 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6182-6:2006(E) ISO 2006 All rights reserved 3 4 Requirement
35、s 4.1 Nominal sizes The nominal size of a check valve shall be the nominal diameter of the inlet and outlet connections, i.e., the pipe size for which the connections are intended. The sizes shall be: 25 mm, 32 mm, 40 mm, 50 mm, 65 mm, 80 mm, 100 mm, 125 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm or
36、 400 mm. The diameter of the waterway through the sealing assembly seat ring may be less than the nominal size. 4.2 Connections 4.2.1 All connections shall be designed for use at the rated working pressure of the valve. 4.2.2 The dimensions of all connections shall conform with applicable requiremen
37、ts to International Standards. If International Standards are not applicable, national standards shall be permitted to be used. 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 may be machined for lower working pr
38、essure to match installation equipment provided the valve is marked with the lower working pressure. 4.4 Body and cover 4.4.1 The body and cover shall be made of a material with a corrosion resistance at least equivalent to cast iron. 4.4.2 Cover fasteners shall be made of steel, stainless steel, ti
39、tanium, or other materials with equivalent physical and mechanical properties. 4.4.3 If non-metallic materials (other than gaskets and seals) or metals with a melting point of less than 800 C, form part of the body or cover, the valve assembly shall be subjected to a fire exposure test as specified
40、in 6.9. Following the fire exposure test, the sealing assembly shall open freely and fully and the valve shall withstand a hydrostatic pressure test as specified in 6.7.1 permanent deformation or failure. 4.4.4 It shall not be possible to assemble a valve with the cover plate in a position which eit
41、her improperly indicates flow direction or prevents proper operation of the valve. 4.4.5 A valve weighing more than 25 kg shall be provided with an access cover, lifting lug or eyebolt to facilitate servicing. 4.5 Strength 4.5.1 An assembled valve, with the sealing assembly blocked open, shall withs
42、tand, without rupture, an internal hydrostatic pressure of four times the rated working pressure, for a period of 5 min when tested in accordance with 6.7.1. 4.5.2 The calculated design load of any fastener, neglecting the force required to compress the gasket, shall not exceed the minimum tensile s
43、trength 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, the area of force application is that extending out to a line defined by the
44、 inner edge of the bolts. b) If an “O”-ring seal or ring gasket is used, the area of force application is that extending out to the centreline of the “O”-ring or gasket. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards
45、1/9972545001 Not for Resale, 04/19/2007 19:45:00 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 6182-6:2006(E) 4 ISO 2006 All rights reserved 4.6 Access for maintenance Means shall be provided to permit access to working parts and the removal of the sealing assembly. A
46、ny method adopted shall permit ready maintenance by one person with a minimum of down time. 4.7 Components 4.7.1 Any component that is normally disassembled during servicing shall be designed so that it can not be reassembled improperly without providing an external visual indication when the valve
47、is returned to service. 4.7.2 With the exception of the 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 components shall be non-detachable during normal operation of the valve. 4.7.4 Fa
48、ilure of the sealing assembly seals shall not prevent the valve from opening. 4.7.5 Seat surfaces of sealing assemblies shall have corrosion resistance equivalent to 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 shall not fracture or ruptu