1、 ISO 2016 Fire protection Foam fire extinguishing systems Part 3: Medium expansion foam equipment Protection contre lincendie Systmes dextinction dincendie mousse Partie 3: quipement pour mousse moyen foisonnement INTERNATIONAL STANDARD ISO 7076-3 First edition 2016-07-01 Reference number ISO 7076-3
2、:2016(E) ISO 7076-3:2016(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, inclu
3、ding 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 T
4、el. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 7076-3:2016(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 Part
5、s for removal during routine field maintenance 2 4.2.1 Removal . 2 4.2.2 Re-assembly . 2 4.3 Corrosion resistance of metal parts 2 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
6、.5.1 General 3 4.5.2 Resistance to ageing 3 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 4 4.10 Water flow . 5 4.11 Operation reliability . 5 4.12 Stress corrosion 5 4.13 Salt-spray corrosion . 5 4.14 Light
7、 and water exposure 5 4.15 Heat and fire resistance . 5 5 Test methods . 5 5.1 General . 5 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 5.7 Measurement
8、of expansion ratio and drainage time . 6 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 . 8 5.13 Heat and fire resistance test 8 6 Marking 8 7 Manufacturers installation and operation instruc
9、tions 9 Annex A (normative) Tolerances .10 Bibliography .11 ISO 2016 All rights reserved iii Contents Page ISO 7076-3:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Internatio
10、nal 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 with ISO
11、, 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 Directives, Par
12、t 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 some of the
13、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 declarations rec
14、eived (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 about ISOs
15、 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 powder med
16、ia 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: High expansi
17、on 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 7076-3:2016(E) Fire protection Foam fire extinguishing systems Part 3: Medium expansion foam equipment 1 Scope This part of ISO
18、 7076 specifies requirements and test methods for medium 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 appl
19、ication. 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 37, Ru
20、bber, 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 chemicals IS
21、O 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 are n
22、ot 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, Mec
23、hanical 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 classes Coa
24、rse 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, Toler
25、ances 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 7076-3:2016(E) ISO 7005-2, Metallic flanges Part 2: Cast iron flanges ISO 7203-2:201
26、1, 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 artificial atmospheres Salt spray tests ASTM D638, Standard test method for tensile properties of plastics
27、 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 definitions apply. 3.1 medium expansion foam foam with 21 to 200 expansion ratio range 4 Requirements 4.1 Co
28、nnections 4.1.1 Permanent connections and joints Permanent joints shall conform to ISO 7-1, ISO 228-1, ISO 1179-1, 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
29、pressure-retaining parts Bolts, nuts or studs or both used to fasten pressure-retaining parts shall conform to 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 r
30、outine field maintenance 4.2.1 Removal Parts intended for removal during routine field maintenance shall be accessible, 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
31、 and construction of any part intended for removal during routine field maintenance shall be such that it cannot be re-assembled in a manner other than as intended. 4.3 Corrosion resistance of metal parts Parts of components that are exposed to foam concentrate or foam solution shall be resistant to
32、 corrosion from that exposure.2 ISO 2016 All rights reserved ISO 7076-3:2016(E) Parts of components 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 co
33、rrosion-resistant properties when exposed to foam concentrate or foam solution. 4.4 Elastomeric 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-or
34、gano-siloxane, a minimum tensile strength of 3,4 MPa, a minimum ultimate elongation of 100 %, and a hardness within 5 units of the manufacturers specification. b) For as-received fluoroelastomers, a minimum tensile of 6,9 MPa, a minimum ultimate elongation of 150 %, and a hardness within 5 units of
35、the manufacturers specification. c) For as-received natural rubber and as-received synthetic rubber other than silicone or fluoroelastomers, a minimum 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 agin
36、g When tested in accordance with ISO 188, the physical properties of elastomeric joint rings after 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 Resis
37、tance to exposure to liquids Elastomeric joint rings shall have the following properties when tested 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 d shall be a
38、t least 60 % of the as- received tensile strength and elongation values. b) The physical properties of a material in continuous contact with the foam solution, after exposure to the foam solution at 70 C 2 C for 60 d shall be at least 60 % of the as-received tensile strength and elongation values. N
39、OTE For a material that is in continuous contact with either foam liquid concentrate or foam 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 opera
40、tion or safety of the product, shall meet the relevant requirements of 4.5.2 and 4.5.3. 4.5.2 Resistance to ageing After ageing in accordance with 5.2 and the appropriate sections of ISO 527-1, ISO 179-1 and ISO 180, specimens of plastics and reinforced resin materials used for components shall a) h
41、ave a tensile strength of no less than 50 % of the value before exposure, ISO 2016 All rights reserved 3 ISO 7076-3:2016(E) 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 i
42、s relevant to stiff plastics, i.e. flexible plastics shall be evaluated using the tensile 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 after exposure to the partic
43、ular liquid in accordance with 5.3 and the appropriate sections of ISO 527-1, ISO 179-1 and ISO 180, 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
44、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 test), and d) show no signs of cracking. 4.6 Strength 4.6.1 The pressure-retaining equipment shall withstand, without rupture, an internal hydrostati
45、c pressure of four times the maximum working pressure for a period of 5 min when 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 gas
46、ket, shall not exceed the minimum tensile strength specified in ISO 898-1 and ISO 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 p
47、ressure is that extending out to a line defined by the centre line 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. 4.7 Leak resistance The pressure-retaining equipment, shall withstand,
48、for 5 min without leakage, an internal hydrostatic pressure of 1,5 times the maximum 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 manufactur
49、er when determined in accordance with 5.6. 4.9 Foam quality The expansion and drainage time of foam produced by medium expansion foam equipment, using the foam concentrate recommended by the manufacturer, shall conform to the values stated by the equipment manufacturer when tested in accordance with 5.7.4 ISO 2016 All rights reserved ISO 7076-3:2016(E) 4.10 Water flow The medium expansion foam equipment shall show no loose parts or leakage when tested
