ISO 6182-4:2019

INTERNATIONAL ISO
STANDARD 6182-4
Second edition
2019-03
Fire protection — Automatic sprinkler
systems —
Part 4:
Requirements and test methods for
quick opening devices
Protection contre l'incendie — Systèmes d'extinction automatique du
type sprinkler —
Partie 4: Exigences et méthodes d'essai des dispostifs a ouverture rapide
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 Rated working pressure . 2
4.2 Leakage test (see 6.4) . 2
4.3 Bodies and covers . 2
4.4 Strength test (see 6.5) . 2
4.5 Components . 3
4.6 Non-metallic components (excluding gaskets, diaphragms and seals) . 3
4.7 Clearances . 3
4.8 Protection of orifices . 3
4.9 Gauge connection. 3
4.10 Operation (see 6.6) . 3
4.11 Equilibrium time (see 6.7) . 4
5 Production testing and quality control . 4
6 Performance tests . 4
6.1 General . 4
6.2 Metallic materials, components (see 4.5.2) . 4
6.3 Non-metallic components (see 4.6) . 4
6.3.1 Air-oven ageing for non-metallic components (excluding gaskets,
diaphragms, and seals) normally exposed to air . 4
6.3.2 Warm water ageing for non-metallic components (excluding gaskets,
diaphragms, and seals) normally exposed to water . 5
6.4 Leakage test (see 4.2) . 5
6.5 Strength test (see 4.4) . 5
6.6 Operational tests (see 4.10) . 6
6.7 Equilibrium time test (see 4.11) . 6
7 Marking . 6
8 Manufacturer’s installation instructions . 6
Bibliography . 8
Foreword
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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.
This second edition cancels and replaces the first edition (ISO 6182-4:1993), which has been technically
revised.
A list of all the parts in the ISO 6182 series, can be found on the ISO website.
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complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved

INTERNATIONAL STANDARD ISO 6182-4:2019(E)
Fire protection — Automatic sprinkler systems —
Part 4:
Requirements and test methods for quick opening devices
1 Scope
This document specifies the performance and testing requirements for accelerators used with dry pipe
valves in fire protection systems to hasten the operation of the valves when one or more sprinklers
operate.
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 49, Malleable cast iron fittings threaded to ISO 7-1
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:
— IEC Electropedia: available at http: //www .electropedia .org/
— ISO Online browsing platform: available at http: //www .iso .org/obp
3.1
accelerator
quick-opening device which hastens the operation of a dry pipe valve using mechanical means other
than by reducing installation pipework pressure
Note 1 to entry: For the purposes of this document, the term accelerator refers to an accelerator and any (internal
or external) antiflooding device (3.2).
3.2
antiflooding device
device intended to prohibit excessive water or other foreign matter from entering any relevant part or
parts of the accelerator where this might prevent subsequent operation
3.3
corrosion-resistant material
metallic material of bronze, brass, copper-nickel alloys metal, austenitic stainless steel, or equivalent,
or plastic material conforming with the requirements of this document
3.4
rated working pressures
maximum service pressure at which an accelerator is intended to operate
3.5
service pressure
static water pressure at the inlet to a dry pipe valve when the accelerator and the dry pipe valve are in
the ready condition
3.6
holding chamber
chamber pressurized with system air pressure which actuates an accelerator upon a sufficient rate of
loss of system air pressure
4 Requirements
4.1 Rated working pressure
The rated working pressure shall be not less than 1,2 MPa (12 bar).
4.2 Leakage test (see 6.4)
4.2.1 There shall be no leakage of an accelerator when a pneumatic pressure of 0,7 MPa (7 bar) is
applied for 1 min in accordance with 6.4.1.
4.2.2 There shall be no leakage of an accelerator when an internal hydrostatic pressure of twice the
rated working pressure is applied for 5 min when tested in accordance with 6.4.2.
4.3 Bodies and covers
4.3.1 Accelerator bodies and covers shall be made of a material having a corrosion resistance at least
equivalent to cast iron.
4.3.2 The dimension of all connections shall conform with the applicable requirements of international
standards. If international standards are not applicable, national standards shall be permitted to be used.
4.3.3 Non-metallic materials, other than gaskets and pipe seals, or metals with a melting point of less
than 650 °C (other than for pipe jointing purposes) shall not form part of the body of accelerators.
4.3.4 It shall not be possible to assemble the accelerator with any cover plate in a position which either
improperly indicates flow direction or prevents proper operation of the device.
4.4 Strength test (see 6.5)
4.4.1 All parts of an accelerator shall withstand a hydrostatic pressure of four times the rated working
pressure for 5 min, without permanent distortion when tested in accordance with 6.5.
4.4.2 If the test in accordance with 6.5 is not done with standard production fasteners, documentation
shall be provided to demonstrate that the calculated design load of any standard production fastener,
neglecting the force required to compress the gasket, does not exceed the minimum tensile strength
2 © ISO 2019 – All rights reserved

specified in ISO 898-1 and ISO 898-2 when the accelerator 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 gasket is used, the area of force application 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 force application is that extending out to the
centerline of the “O”-ring or gasket.
4.5 Components
4.5.1 It shall be possible to disassemble and
...