1、 Reference number ISO 6182-6:2006(E) ISO 2006INTERNATIONAL 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: Exigences
2、 et mthodes dessai des postes de contrle ISO 6182-6:2006(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
3、 computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to
4、 create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please infor
5、m the Central Secretariat at the address given 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 ei
6、ther ISO at the address below or ISOs member body 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 reservedISO 6182-6:2006(E) IS
7、O 2006 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative 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 ISO 6182-6:2006(E) iv ISO 2006 All rights reservedFore
8、word ISO (the International Organization for Standardization) is a worldwide 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 techn
9、ical committee has been established has the right to be represented 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
10、electrotechnical standardization. International Standards are drafted 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
11、 the member bodies for voting. Publication as an International Standard 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
12、identifying any or all such patent rights. ISO 6182-6 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 5, Fixed firefighting systems using water. ISO 6182 consists of the following parts, under the general title Fire protection Automatic
13、 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 test methods for quick-opening devices Part 5
14、: 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 alarm valves Part 9: Requirements and test met
15、hods 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 pipe couplings Part 13: Requirements and test methods for extended coverage sprinklers ISO 6182-6:
16、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 sprinkler systems, including the following: a) carbon dioxide systems (ISO 6183), b) explosion suppression systems (ISO
17、6184), An International Standard covering foam systems is planned. 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 performance requireme
18、nts, 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 undated references, th
19、e 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-strain properties ISO 1
20、88, 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 load values Coarse thr
21、ead 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 connections or may be of th
22、e wafer type. 3.2 clapper type of sealing element NOTE See 3.8. ISO 6182-6:2006(E) 2 ISO 2006 All rights reserved3.3 corrosion-resistant material bronze, brass, Monel 1)metal, austenitic stainless steel, or equivalent, or plastic material conforming with the requirements of this document 3.4 flow ve
23、locity speed of water flow through a valve expressed as the equivalent water velocity through a pipe of the same nominal size as the valve 3.5 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 a
24、ssembly in the closed or set 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
25、a clapper) of the valve, which 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 pre
26、ssure static water pressure 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
27、 enough to span the valve 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
28、 product. ISO 6182-6:2006(E) ISO 2006 All rights reserved 3 4 Requirements 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
29、, 65 mm, 80 mm, 100 mm, 125 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm or 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 T
30、he dimensions of all connections shall conform with applicable requirements 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)
31、. 4.3.2 Inlet and outlet connections may be machined for lower working pressure 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 cas
32、t iron. 4.4.2 Cover fasteners shall be made of steel, stainless steel, titanium, 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, th
33、e valve assembly shall be subjected to a fire exposure test as specified 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
34、possible to assemble a valve with the cover plate in a position which either 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.
35、1 An assembled valve, with the sealing assembly blocked open, shall withstand, 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 forc
36、e required to compress the gasket, shall 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, the
37、 area of force application 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 force application is that extending out to the centreline of the “O”-ring or gasket. ISO 6182-6:2006(E) 4 ISO 2006 All rights reserved4.6 Acce
38、ss for maintenance Means shall be provided to permit access to working parts and the 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 that is normally disassembled during servicing shall b
39、e designed so that it can not be reassembled improperly without providing an external visual indication when the valve 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 norm
40、ally employed by the trade. 4.7.3 All components shall be non-detachable during normal operation of the valve. 4.7.4 Failure 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
41、 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 rupture during 50 000 cycles of normal operation when tested in accordance with 6.2. 4.
42、7.7 When wide open, the sealing assembly shall bear against a definite stop. The point of contact shall be located so that impact or the reaction of the water flow does not permanently twist, bend or fracture the valve parts. 4.7.8 Where rotation or sliding motion is required, the part or its bearin
43、g shall be made of corrosion- resistant material. Materials lacking corrosion resistance shall be fitted with bushings, inserts, or other parts made of corrosion resistant materials at those points where freedom of movement is required. 4.8 Leakage 4.8.1 There shall be no leakage, permanent distorti
44、on or rupture of a valve when an internal pressure of twice the rated working pressure is applied for a period of 5 min with the sealing assembly open when tested in accordance with 6.7.1. 4.8.2 There shall be no leakage, permanent distortion or rupture of a valve at an internal pressure of twice th
45、e rated working pressure applied at the downstream end with the sealing assembly closed for a period of 5 min and the upstream end vented when tested in accordance with 6.7.2. 4.8.3 There shall be no leakage, permanent distortion or rupture of a valve at an internal pressure equivalent to the head o
46、f a column of water 1,5 m high when applied at the downstream end with the sealing assembly closed for a period of 16 h and the upstream end vented when tested in accordance with 6.7.3. 4.9 Non-metallic components (excluding gaskets and seals) 4.9.1 After ageing of its non-metallic parts as describe
47、d in 6.4 and 6.5 using separate sets of samples, a valve shall meet the requirements of 4.8 when tested in accordance with 6.7.2. 4.9.2 There shall be no cracking, warping, creep, or other signs of deterioration that can preclude the proper operation of the valve. ISO 6182-6:2006(E) ISO 2006 All rig
48、hts reserved 5 4.10 Sealing assembly elements 4.10.1 A seal made of elastomeric or other resilient materials shall not adhere to the mating surface when tested in accordance with 6.3.1. Where the same design of seat is used for more than one size of valve, it shall be permitted to test only the size
49、 with the highest stress on the seating surface. 4.10.2 Any non-reinforced elastomer forming the seal shall have the following properties when tested in accordance with 6.3.2 and the appropriate sections of ISO 37: a) maximum set of 5 mm when 25 mm long marks are stretched to 75 mm, held for 2 min, and measured 2 min after release; b) either 1) minimum tensile strength 10 MPa (100 bar) and minimum ultimate elongation 300 % (25 mm to 100 mm), or 2) minimum tensile strength 15 MPa (150 bar)
