1、 ISO 2012 Fire protection Foam fire extinguishing systems Part 1: Foam proportioning equipment Protection contre lincendie Systmes dextinction dincendie mousse Partie 1: quipement de dosage de la mousse INTERNATIONAL STANDARD ISO 7076-1 First edition 2012-05-15 Reference number ISO 7076-1:2012(E) IS
2、O 7076-1:2012(E) ii ISO 2012 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2012 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 permi
3、ssion in writing from either 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 ISO 7076-1:2012(E) ISO 2012
4、All rights reserved iii Contents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Terms and definitions . 2 4 Requirements . 2 4.1 Connections 2 4.2 Parts for removal during routine field maintenance 2 4.3 Corrosion resistance of metal parts . 2 4.4 Elastomeric joint rings . 3 4.5 Plastics an
5、d reinforced resin materials . 3 4.6 Strength . 3 4.7 Leak resistance 4 4.8 Proportioning ratio 4 4.9 Pressure loss 4 4.10 Operation reliability 4 4.11 Water flow 4 4.12 Stress corrosion 4 4.13 Salt-spray corrosion . 4 4.14 Light and water exposure . 4 5 Test methods 5 5.1 General . 5 5.2 Ageing tes
6、t for plastics and reinforced resin materials . 5 5.3 Liquid exposure test . 5 5.4 Equipment pressurization test . 5 5.5 Leak resistance test 5 5.6 Proportioning ratio test 5 5.7 Pressure loss test . 5 5.8 Operation reliability test 6 5.9 Water flow test 6 5.10 Stress corrosion test 6 5.11 Salt-spra
7、y corrosion test . 7 5.12 Light and water exposure test . 7 6 Marking . 8 7 Manufacturers installation and operation instructions . 8 Annex A (normative) Tolerances 9 Bibliography .10 ISO 7076-1:2012(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of na
8、tional 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 on that committee. Intern
9、ational 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 drafted in accordance with the
10、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 Standard requires approval by
11、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 7076-1 was prepared by Technical Committee ISO
12、/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 6, Foam and powder 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 Pa
13、rt 2: Low expansion foam equipment Part 5: Compressed air foam equipment 1) 1) To be published. iv ISO 2012 All rights reserved INTERNATIONAL STANDARD ISO 7076-1:2012(E) Fire protection Foam fire extinguishing systems Part 1: Foam proportioning equipment 1 Scope This International Standard specifies
14、 requirements and test methods for foam proportioning equipment of fixed foam extinguishing systems for indoor or outdoor use or both. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applie
15、s. 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 175, Plastics Methods of test for the determination of the effects
16、 of immersion in liquid chemicals ISO 179-1, Plastics Determination of Charpy impact properties Part 1: Non-instrumented impact test ISO 180, Plastics Determination of Izod impact strength ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances
17、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, Mechanical properties of fasteners made of carbon steel a
18、nd 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 Part 2: Nuts with specified proof load values Coarse thread ISO 1179-1, Connections for general use and fluid power Ports and stud ends wit
19、h ISO 228-1 threads with elastomeric or metal-to-metal sealing Part 1: Threaded ports ISO 4633, Rubber seals Joint rings for water supply, drainage and sewerage pipelines Specification for materials ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C
20、ISO 7005-1, Pipe flanges Part 1: Steel flanges for industrial and general service piping systems ISO 7005-2, Metallic flanges Part 2: Cast iron flanges ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests ASTM D638, Standard test method for tensile properties of plastics ASTM G155, S
21、tandard practice for operating xenon arc light apparatus for exposure of non-metallic materials ISO 2012 All rights reserved 1 ISO 7076-1:2012(E) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 proportioning ratio volume percentage of foam co
22、ncentrate in a foam solution 3.2 foam proportioning equipment equipment which controls the mixing of foam concentrate into a water flow, at a predetermined ratio, to produce a foam solution EXAMPLE Balanced pressure proportioner, bladder tank proportioner, inline eductor, pump proportioner. 3.3 work
23、ing pressure pressure at which the foam proportioning equipment is used in the system 4 Requirements 4.1 Connections 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 s
24、pecifications 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 ISO 272, ISO 885 and ISO 4759-1, or shall conform to other technical specification
25、s 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 accessible, removable and replaceable without damage using appropriate tools normall
26、y 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 cannot be re-assembled in a manner other than as intended. 4.3 Corrosion resistance o
27、f 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 components that are intended to freely move during operation or bear against, rotate within, or slide on stationary parts shall be of a cor
28、rosion-resistant material. NOTE Bronze is a typical material that has corrosion-resistant properties when exposed to foam concentrate or foam solution. 2 ISO 2012 All rights reserved ISO 7076-1:2012(E) 4.4 Elastomeric joint rings Elastomeric joint rings shall conform to the requirements of Type W of
29、 ISO 4633. 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. 4.5.2 Resistance to ageing After ageing in accordance with 5.2 and the
30、appropriate sections of ISO 527-1, ISO 179-1 and ISO 180, specimens of plastics and reinforced resin materials used for components 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
31、 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 test); d) show no signs of cracking. 4.5.3 Resistance to exposure to liquids Plastics and reinforced resin materials w
32、hich 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 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 elonga
33、tion 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 test); d) show no signs of cracking. 4.6 Strength 4
34、.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 tested as specified in 5.4. 4.6.2 The calculated design load of any fastener, neglecting the force required to compress the g
35、asket, 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
36、 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. ISO 2012 All rights reserved 3 ISO 7076-1:2012(E) 4.7 Leak resistance
37、The pressure-retaining equipment, except atmospheric storage tanks and pressure vessels, shall withstand 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 Proportioning ratio Th
38、e measured proportioning ratio shall not be less than the rated concentration stated by the manufacturer and not more than 1,3 times the rated concentration or one percentage point above the rated concentration (whichever is less) when tested in accordance with 5.6. 4.9 Pressure loss When tested in
39、accordance with 5.7, the maximum deviation of pressure loss shall not be more than 10 % and 0 % of the value stated by the manufacturer. 4.10 Operation reliability The spring, slider and other movable parts of foam proportioning equipment shall be tested individually in accordance with 5.8. After te
40、sting, the movable parts shall be reinstalled in the foam proportioning equipment, and the equipment shall operate properly. The proportioning ratio of the equipment shall meet the requirement of 4.8 when tested in accordance with 5.6. 4.11 Water flow The foam proportioning equipment shall show no l
41、oose parts or leakage when tested in accordance with 5.9. 4.12 Stress corrosion After being subjected to the conditions described in 5.10, a brass part containing greater than 15 % zinc shall comply with the following requirements: a) show no evidence of cracking when examined using 25x magnificatio
42、n, or b) if there is evidence of cracking of pressure-retaining equipment, comply with 4.6 at 2 times the maximum working pressure rather than 4 times the maximum working pressure, or c) if there is evidence of cracking of equipment that is not pressure-retaining, comply with 4.11. 4.13 Salt-spray c
43、orrosion After being subjected to the conditions described in 5.11, equipment constructed from metallic parts using combinations of brass, bronze, or ferrous metals shall show no destruction or damage which impairs function. 4.14 Light and water exposure Following light and water exposure for 720 h,
44、 as specified in 5.12, an exterior polymeric or fibreglass component part or samples prepared from the same exterior polymeric or fibreglass component material: a) shall show no evidence of cracking, and b) a component part that need not be cut or altered in order to be subjected to the exposure sha
45、ll function as intended when operated at its highest inlet pressure and highest flow rate for 2 min; c) a component part that needs to be cut or altered in order to be subjected to the exposure shall have physical properties not less than 60 % of the original as-received physical properties when sub
46、jected to tensile tests described in ASTM D638. 4 ISO 2012 All rights reserved ISO 7076-1:2012(E) 5 Test methods 5.1 General The following tests shall be carried out for each type of foam proportioning equipment. Tests shall be carried out at ambient temperatures of 20 C 10 C, unless other temperatu
47、res are indicated. Unless otherwise stated, the tolerances given in Annex A shall apply. 5.2 Ageing test for plastics and reinforced resin materials Place five specimens of the material under test in an air tolerance oven at 100 C 2 C for 90 d. Allow to cool in air at 23 C 3 C for 24 h 4 h before te
48、sting. NOTE Certain plastics require a lower oven temperature. In such cases, if the acceleration factors are unknown, it is assumed that the lowering of the temperature by 10 C implies a doubling of the ageing time. 5.3 Liquid exposure test Immerse five samples in each of the liquids with which the
49、 material comes into contact, in accordance with ISO 175, for 210 d at 50 C 2 C. Use the appropriate test liquid, i.e. potable water, seawater or foam concentrate or foam solution, recommended by the supplier. 5.4 Equipment pressurization test The foam proportioning equipment shall be fastened in the test device. Any materials or parts that are not capable of withstanding test pressure should be removed or replaced by suitable ones. Blank off or plug all orifices
