1、 ISO 2016 Fire protection Foam fire extinguishing systems Part 4: High expansion foam equipment Protection contre lincendie Systmes dextinction dincendie mousse Partie 4: quipement pour mousse haut foisonnement INTERNATIONAL STANDARD ISO 7076-4 First edition 2016-07-01 Reference number ISO 7076-4:20
2、16(E) ISO 7076-4:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, includin
3、g photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel.
4、 +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 7076-4:2016(E)Foreword iv 1 Scope . 1 2 Normative references 1 3 Terms and definitions . 2 4 Requirements 2 4.1 Connections . 2 4.1.1 Permanent connections and joints . 2 4.1.2 Bolting of pressure-retaining parts . 2 4.2 Parts f
5、or removal during routine field maintenance 2 4.2.1 Removal . 2 4.2.2 Re-assembly . 2 4.3 Corrosion resistance of metal parts 3 4.4 Elastomeric joint rings . 3 4.4.1 General 3 4.4.2 Resistance to aging . 3 4.4.3 Resistance to exposure to liquids 3 4.5 Plastics and reinforced resin materials . 3 4.5.
6、1 General 3 4.5.2 Resistance to ageing 4 4.5.3 Resistance to exposure to liquids 4 4.6 Strength . 4 4.7 Leak resistance . 4 4.8 Discharge coefficient (K factor) 4 4.9 Foam quality and foam capacity 5 4.10 Water flow . 5 4.11 Operation reliability . 5 4.12 Stress corrosion 5 4.13 Salt-spray corrosion
7、 . 5 4.14 Light and water exposure 5 4.15 Heat and fire resistance . 6 5 Test methods . 6 5.1 General . 6 5.2 Ageing test for plastics and reinforced resin materials . 6 5.3 Liquid exposure test . 6 5.4 Equipment pressurization test 6 5.5 Leak resistance test . 6 5.6 Flow coefficient measurement 6 5
8、.7 Measurement of foam capacity and foam quality . 7 5.8 Water flow test 7 5.9 Operation reliability test 7 5.10 Stress corrosion test . 7 5.11 Salt-spray corrosion test . 8 5.12 Light and water exposure test . 9 5.13 Heat and fire resistance . 9 6 Marking 9 7 Manufacturers installation and operatio
9、n instructions 9 Annex A (normative) Tolerances .10 Bibliography .11 ISO 2016 All rights reserved iii Contents Page ISO 7076-4:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing I
10、nternational 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-governmental, in liaison
11、 with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Direct
12、ives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that som
13、e 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declara
14、tions received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformit y assessment, as well as information a
15、bout ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html. The committee responsible for this document is ISO/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 6, Foam and p
16、owder media and firefighting systems using foam and powder. ISO 7076 consists of the following parts, under the general title Fire protection Foam fire extinguishing systems: Part 1: Foam proportioning equipment Part 2: Low expansion foam equipment Part 3: Medium expansion foam equipment Part 4: Hig
17、h expansion foam equipment Part 5: Fixed compressed air foam equipment Part 6: Vehicle mounted compressed air foam systemsiv ISO 2016 All rights reserved INTERNATIONAL ST ANDARD ISO 7076-4:2016(E) Fire protection Foam fire extinguishing systems Part 4: High expansion foam equipment 1 Scope This part
18、 of ISO 7076 specifies requirements and test methods for high expansion foam equipment of fixed-foam extinguishing systems for indoor or outdoor use or both. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its
19、 application. For dated references, only the edition cited applies. For undated 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: Dimensions, tolerances and designation ISO 3
20、7, Rubber, vulcanized or thermoplastic Determination of tensile stress-strain properties ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 175, Plastics Methods of test for the determination of the effects of immersion in liquid chemica
21、ls ISO 179-1, Plastics Determination of Charpy impact properties Part 1: Non-instrumented impact test ISO 180, Plastics Determination of Izod impact strength ISO 188, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests ISO 228-1, Pipe threads where pressure-tight joints
22、are not made on the threads Part 1: Dimensions, tolerances and designation ISO 272, Fasteners Hexagon products Widths across flats ISO 527-1, Plastics Determination of tensile properties Part 1: General principles ISO 885, General purpose bolts and screws Metric series Radii under the head ISO 898-1
23、, Mechanical properties 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 classe
24、s Coarse thread and fine pitch thread ISO 1179-1, Connections for general use and fluid power Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing Part 1: Threaded ports ISO 1817, Rubber, vulcanized or thermoplastic Determination of the effect of liquids ISO 4759-1,
25、Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C ISO 7005-1, Pipe flanges Part 1: Steel flanges for industrial and general service piping systems ISO 2016 All rights reserved 1 ISO 7076-4:2016(E) ISO 7005-2, Metallic flanges Part 2: Cast iron flanges ISO 7076-
26、2:2012, Fire protection Foam fire extinguishing systems Part 2: Low expansion foam equipment ISO 7203-2:2011, Fire extinguishing media Foam concentrates Part 2: Specification for medium- and high-expansion foam concentrates for top application to water-immiscible liquids ISO 9227, Corrosion tests in
27、 artificial atmospheres Salt spray tests ASTM D638, Standard test method for tensile properties of plastics ASTM G155, Standard practice for operating xenon arc light apparatus for exposure of non-metallic materials 3 Terms and definitions For the purposes of this document, the following terms and d
28、efinitions apply. 3.1 high expansion foam foam which has an expansion greater than 200 3.2 50 % drainage time time for 50 % of the liquid content of a foam to drain out 4 Requirements 4.1 Connections 4.1.1 Permanent connections and joints Permanent joints shall conform to ISO 7-1, ISO 228-1, ISO 117
29、9-1, ISO 7005-1 or ISO 7005-2, as applicable, or shall conform to other technical specifications valid in the place of use where International Standards are not applicable. 4.1.2 Bolting of pressure-retaining parts Bolts, nuts or studs or both used to fasten pressure-retaining parts shall conform to
30、 ISO 272, ISO 885 and ISO 4759-1, or shall conform to other technical specifications valid in the place of use where International Standards are not applicable. 4.2 Parts for removal during routine field maintenance 4.2.1 Removal Parts intended for removal during routine field maintenance shall be a
31、ccessible, removable and replaceable without damage using appropriate tools normally used by the trade, or special tools recommended by the component manufacturer. 4.2.2 Re-assembly The design and construction of any part intended for removal during routine field maintenance shall be such that it ca
32、nnot be re-assembled in a manner other than as intended.2 ISO 2016 All rights reserved ISO 7076-4:2016(E) 4.3 Corrosion resistance of metal parts Those parts of components that are exposed to foam concentrate or foam solution shall be resistant to corrosion from that exposure. Those parts of compone
33、nts that are intended to freely move during operation or bear against, rotate within, or slide on stationary parts shall be of a corrosion-resistant material. NOTE Bronze is a typical material that has corrosion-resistant properties when exposed to foam concentrate or foam solution. 4.4 Elastomeric
34、joint rings 4.4.1 General Elastomeric joint rings shall have the following properties when tested in accordance with ISO 37 and ISO 48. a) For as-received silicone rubber with basic constituent of poly-organo-siloxane, a minimum tesnsile strength of 3,4 MPa, a minimum ultimate elongation of 100 %, a
35、nd a hardness within 5 units of the manufacturers specification. b) For as-received fluoroelastomers, a minmum tensile of 6,9 MPa, a minimum ultimate elongation of 150 %, and a hardness within 5 units of the manufacturers specification. c) For as-received natural rubber and as-received synthetic rub
36、ber other than silicone or fluoroelastomers, a minmum tensile of 8,3 MPa, a minimum ultimate elongation of 150 % ,and a hardness within 5 units of the manufacturers specification. 4.4.2 Resistance to aging When tested in accordance with ISO 188, the physical properties of elastomeric joint rings aft
37、er oven ageing at 100 C 2 C for 70 h shall be at least 60 % of the as-received tensile strength and elongation values. Any change in the hardness shall not exceed 5 % of the as-received value. 4.4.3 Resistance to exposure to liquids Elastomeric joint rings shall have the following properties when te
38、sted in accordance with ISO 1817. a) The physical properties of a material in continuous contact with foam liquid concentrate, after exposure to the foam liquid concentrate at 70 C 2 C for 60 days shall be at least 60 % of the as- received tensile strength and elongation values; b) The physical prop
39、erties of a material in continuous contact with the foam solution, after exposure to the foam solution at 70 C 2 C for 60 days shall be at least 60 % of the as-received tensile strength and elongation values. NOTE For a material that is in continuous contact with either foam liquid concentrate or fo
40、am solution, compliance with 4.4.3 a) is considered representative of 4.4.3 b). 4.5 Plastics and reinforced resin materials 4.5.1 General Plastic or reinforced resin components, which are essential to the operation or safety of the product, shall meet the relevant requirements of 4.5.2 and 4.5.3. IS
41、O 2016 All rights reserved 3 ISO 7076-4:2016(E) 4.5.2 Resistance to ageing After ageing in accordance with 5.2 and the appropriate sections of ISO 179-1, ISO 180 and ISO 527-1, specimens of plastics and reinforced resin materials used for components shall a) have a tensile strength of no less than 5
42、0 % of the value before exposure, b) have an elongation at break of no less than 50 % of the value before exposure, or c) have an impact strength of no less than 50 % of the value before exposure (this method is relevant to stiff plastics, i.e. flexible plastics shall be evaluated using the tensile
43、test), and d) show no signs of cracking. 4.5.3 Resistance to exposure to liquids Plastics and reinforced resin materials which come into contact with foam concentrate, foam solution or water after exposure to the particular liquid in accordance with 5.3 and the appropriate sections of ISO 179-1, ISO
44、 180 and ISO 527-1, shall a) have a tensile strength of no less than 50 % of the value before exposure, b) have an elongation at break of no less than 50 % of the value before exposure, or c) have an impact strength of no less than 50 % of the value before exposure (this method is relevant to stiff
45、plastics, i.e. flexible plastics shall be evaluated using the tensile test), and d) show no signs of cracking. 4.6 Strength 4.6.1 The pressure-retaining equipment shall withstand, without rupture, an internal hydrostatic pressure of four times the maximum working pressure for a period of 5 min when
46、tested as specified in 5.4. The test in 5.4 is a laboratory test that chooses one sample from 100 or less manufactured. 4.6.2 The calculated design load of any fastener, neglecting the force required to compress the gasket, shall not exceed the minimum tensile strength specified in ISO 898-1 and ISO
47、 898-2 when the equipment is pressurized to four times the maximum 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 application of pressure is that extending out to a line defined by the inner edge of the bolts. b
48、) 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. 4.7 Leak resistance The pressure-retaining equipment, shall withstand, for 5 min without leakage, an internal hydrostatic pressure of 1,5 times the maxim
49、um working pressure specified by the manufacturer, when tested in accordance with 5.5. 4.8 Discharge coefficient (K factor) The discharge coefficient (K factor) shall be within 5 % of the value stated by the manufacturer when determined in accordance with 5.6.4 ISO 2016 All rights reserved ISO 7076-4:2016(E) 4.9 Foam quality and foam capacity 4.9.1 The expansion and drainage time of foam produced by high expansion foam equipment, using the foam
