ISO 7076-3:2016

Fire protection — Foam fire extinguishing systems — Part 3: Medium expansion foam equipment

ISO 7076-3:2016 specifies requirements and test methods for medium expansion foam equipment of fixed-foam extinguishing systems for indoor or outdoor use or both.

Protection contre l'incendie — Systèmes d'extinction d'incendie à mousse — Partie 3: Équipement pour mousse à moyen foisonnement

General Information

• Status: Published
• Publication Date: 29-Jun-2016
• ICS: 13.220.10 - Fire-fighting
• Technical Committee: ISO/TC 21/SC 6 - Foam and powder media and firefighting systems using foam and powder
• Drafting Committee: ISO/TC 21/SC 6 - Foam and powder media and firefighting systems using foam and powder
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 18-Mar-2022

Relations

• Consolidated By: ISO 3924:2019 - Petroleum products — Determination of boiling range distribution — Gas chromatography method
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 7076-3
First edition
2016-07-01
Fire protection — Foam fire
extinguishing systems —
Part 3:
Medium expansion foam equipment
Protection contre l’incendie — Systèmes d’extinction d’incendie à
mousse —
Partie 3: Équipement pour mousse à moyen foisonnement
Reference number
ISO 7076-3:2016(E)
©
ISO 2016

---------------------- Page: 1 ----------------------
ISO 7076-3:2016(E)

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, including 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 ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 7076-3:2016(E)

Contents Page
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 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
4.5.1 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 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 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 Manufacturer’s installation and operation instructions . 9
Annex A (normative) Tolerances .10
Bibliography .11
© ISO 2016 – All rights reserved iii

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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 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-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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, 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 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. 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 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 conformity assessment,
as well as information about ISO’s 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 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: High expansion foam equipment
— Part 5: Fixed compressed air foam equipment
— Part 6: Vehicle mounted compressed air foam systems
iv © ISO 2016 – All rights reserved

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INTERNATIONAL STANDARD ISO 7076-3:2016(E)
Fire protection — Foam fire extinguishing systems —
Part 3:
Medium expansion foam equipment
1 Scope
This part of ISO 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 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 37, 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 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 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 228-1, Pipe threads where pressure-tight joints 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, 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 classes — 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, 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

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ISO 7076-3:2016(E)

ISO 7005-2, Metallic flanges — Part 2: Cast iron flanges
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 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 definitions apply.
3.1
medium expansion foam
foam with 21 to 200 expansion ratio range
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 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 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 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 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
corrosion from that exposure.
2 © ISO 2016 – All rights reserved

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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 corrosion-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-organo-siloxane, a minimum tensile
strength of 3,4 MPa, a minimum ultimate elongation of 100 %, and a hardness within ±5 units of
the manufacturer’s 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 the manufacturer’s 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 manufacturer’s specification.
4.4.2 Resistance to aging
When tested in acco
...

DRAFT INTERNATIONAL STANDARD
ISO/DIS 7076-3
ISO/TC 21/SC 6 Secretariat: SAC
Voting begins on: Voting terminates on:
2015-09-24 2015-12-24
Fire protection — Foam fire extinguishing systems —
Part 3:
Medium expansion foam equipment
Protection contre l’incendie — Systèmes d’extinction d’incendie à mousse —
Partie 3: Équipement pour mousse à moyen foisonnement
ICS: 13.220.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 7076-3:2015(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015

---------------------- Page: 1 ----------------------
ISO/DIS 7076-3:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, 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, including 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 ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2015 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/DIS 7076-3
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 and reinforced resin materials . 3
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. 4
4.11 Operation reliability . 5
4.12 Stress corrosion . 5
4.13 Salt-spray corrosion . 5
4.14 Light 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 Discharge coefficient measurement . 6
5.7 Measurement 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 Manufacturer's installation and operation instructions . 9
Annex A (normative) Tolerances . 10
Bibliography . 11

© ISO 2015 – All rights reserved iii

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ISO/DIS 7076-3
Foreword
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 technical 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 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 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 identifying any or all such patent rights.
ISO 7076-3 was prepared by Technical Committee ISO/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
 Part 2: Low expansion foam equipment
 Part 5: Fixed compressed air foam equipment
The following parts are under preparation:
 Part 3: Medium expansion foam equipment
 Part 4: High expansion foam equipment
 Part 6: Vehicle mounted compressed air foam systems
iv © ISO 2015 – All rights reserved

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DRAFT INTERNATIONAL STANDARD ISO/DIS 7076-3

Fire protection — Foam fire extinguishing systems — Part 3:
Medium expansion foam equipment
1 Scope
This International Standard 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 referenced documents are indispensable for the application of this document. 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, 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 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 188, Rubber, vulcanized or thermoplastic — Accelerated ageing or heat resistance tests
ISO 228-1, Pipe threads where pressure-tight joints 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, 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 — Part 2: Nuts with specified proof load values — Coarse
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,Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B and C
© ISO 2015 – All rights reserved 1

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ISO/DIS 7076-3
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 7203-2, 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
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 which has an expansion ratio in the range 21 to 200
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 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 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 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 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
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 corrosion-resistant material.
2 © ISO 2015 – All rights reserved

---------------------- Page: 6 ----------------------
ISO/DIS 7076-3
NOTE Bronze is a typical material that has corrosion-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-organo-siloxane,a minimum tesnsile strength
of 3.4 MPa,a minimum ultimate elongation of 100 percent ,and a hardness within ±5 units of the
manufacturer’s specification.
b) For as-received fluoroelastomers,a minmum tensile of 6.9 MPa, a minimum ultimate elongation of 150
percent ,and a hardness within ±5 units of the manufacturer’s specification.
c) For as-received natural rubber and as-received synthetic rubber other than silicone or fluoroelastomers,a
minmum tensile of 8.3MPa, a minimum ultimate elongation of 150 percent ,and a hardness within ±5
units of the manufacturer’s specification.
4.4.2 Resistance to aging
When tested in accordance with ISO 188, the physical properties of elastomeric joint rings after oven ageing at
100 °C ±2℃ 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 tested in accordance with ISO1817:
a) The physical properties of a material in continuous contact with foam liquid concentrate, after exposure to
the foam liquid concentrate at 70℃±2℃ for 60 days shall be at 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
the foam solution at 70℃±2℃ 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 foam solution, compliance
with 4.4.3 is considered representative of 4.4.4.
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 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 les
...