ISO 6182-16:2020

INTERNATIONAL ISO
STANDARD 6182-16
First edition
Fire protection — Automatic sprinkler
systems —
Part 16:
Requirements and test methods for
fire pump relief valves
PROOF/ÉPREUVE
Reference number
ISO 6182-16:2020(E)
©
ISO 2020

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ISO 6182-16:2020(E)

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© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
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ISO 6182-16:2020(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 Nominal sizes and tolerances . 2
4.2 Connections . 2
4.3 Rated working pressure . 2
4.4 Body and cover . 2
4.5 Body strength (see 6.4) . 3
4.6 Access for maintenance . 3
4.7 Components . 3
4.8 Leakage and deformation (see 6.3) . 4
4.9 Non-metallic components (excluding gaskets, diaphragms, seals and other
elastomeric parts) . 4
4.10 Sealing assembly elements (see 6.7). 4
4.11 Clearances . 4
4.12 Operation and reseat (see 6.8) . 4
4.13 Flow capacity (see 6.9) . 4
4.14 Endurance (see 6.10). 5
5 Production testing and quality control . 5
6 Tests . 5
6.1 Samples . 5
6.2 Spring and diaphragm test (see 4.7.6 and 4.7.7) . 6
6.3 Leakage and deformation (see 4.8) . 6
6.3.1 Body leakage . 6
6.3.2 Sealing assembly . 6
6.4 Body strength (see 4.5) . 6
6.5 Warm-water ageing test for non-metallic components (excluding gaskets, seals
and other elastomeric components) . 6
6.6 Air ageing test for non-metallic components (excluding gaskets, seals and other
elastomeric components) . 7
6.7 Sealing element tests (see 4.10) . 7
6.8 Operational and reseat (see 4.12) . 8
6.9 Flow capacity (see 4.13) . 8
6.10 Endurance test (see 4.14) . 8
7 Marking . 8
8 Manufacturer’s installation instructions . 9
Annex A (normative) Tolerances .10
Bibliography .11
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ISO 6182-16:2020(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 of the voluntary nature of standards, 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 www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire
fighting, Subcommittee SC 5, Fixed firefighting systems using water.
A list of all parts in the ISO 6182 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
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INTERNATIONAL STANDARD ISO 6182-16:2020(E)
Fire protection — Automatic sprinkler systems —
Part 16:
Requirements and test methods for fire pump relief valves
1 Scope
This document defines performance requirements, methods of testing and marking requirements for
fire pump relief valves intended to rapidly relieve the excessive water pressure in the supply piping for
standpipe systems or sprinkler systems or both. Performance and test requirements for other auxiliary
components or attachments to fire pump relief valves are not covered by this standard.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 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
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
corrosion resistant material
®1)
bronze, brass, Monel metal, austenitic stainless steel, or equivalent, or plastic material conforming
with the requirements of this document
3.2
main valve
part of the valve assembly that controls the flow of water
3.3
maximum set pressure rating
maximum pressure at which the valve is intended to be set to relieve pressure from a water supply system
®
1) Monel is a trademark of Special Metals Corporation and is an example of a suitable product available
commercially. This information is given for the convenience of users of this document and does not constitute an
endorsement by ISO of this product. Equivalent products may be used if they can be shown to lead to the same
results.
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ISO 6182-16:2020(E)

3.4
pilot valve
part of the valve assembly that controls the operating of the main valve (3.2)
3.5
rated working pressure
maximum service pressure at which a valve is intended to operate
3.6
reseat pressure
pressure at which the relief valve is intended to prevent the flow of water
3.7
set pressure
pressure at which the main valve (3.2) is intended to start to allow the flow of water
4 Requirements
4.1 Nominal sizes and tolerances
4.1.1 The nominal size of a fire pump relief 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 20 mm, 32 mm,
40 mm, 50 mm, 65 mm, 80 mm, 100 mm, 125 mm, 150 mm, 200 mm, 250 mm or 300 mm. The diameter
of the waterway through the sealing assembly seat ring may be no more than one size smaller than the
nominal size.
4.1.2 Unless otherwise noted in a specific clause of this document, tolerances shall be in accordance
with Annex A.
4.2 Connections
4.2.1 All connections shall be designed for use at the rated working pressure of the valve.
4.2.2 The dimensions of all connections shall conform with the applicable requirements of relevant
international standards. If international standards are not applicable, national standards may be used.
For example, ISO 6182-12 contains requirements for grooved-end components. Where there is not an
ISO standard developed, a national standard may be used for other connection types (i.e. threaded,
flanged, or other suitable connections).
4.3 Rated working pressure
4.3.1 The rated working pressure shall be not less than 1,2 MPa (12 bar).
4.3.2 Connections may be machined for lower working pressures to match installation equipment
provided the valve is marked with the lower working pressure, as per 7.3, f).
4.4 Body and cover
4.4.1 The body and cover shall be made of a material with corrosion resistance at least equivalent to
cast iron.
4.4.2 Cover fasteners shall be made of steel, stainless steel, titanium, or other materials with equivalent
physical and mechanical properties.
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ISO 6182-16:2020(E)

4.4.3 Non-metallic materials other than gaskets, diaphragms and seals or metals with a melting point
less than 800 °C shall not form part of the valve body or cover.
4.4.4 It shall not be possible to assemble the valve with the cover plate in a position which either
improperly indicates flow direction or prevents proper operation of the valve.
4.5 Body strength (see 6.4)
An assembled fire pump relief 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 as specified in 6.4.
If the test is not performed with standard production fasteners, the supplier shall provide documentation
showing that 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 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 area of application of 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
centreline of the “O”-ring or gasket.
4.6 Access for maintenance
Means shall be provided to permit access to working parts and removal of the sealing assembly. Any
method adopted should permit ready maintenance b
...