ISO 6182-3:2005
(Main)Fire protection — Automatic sprinkler systems — Part 3: Requirements and test methods for dry pipe valves
Fire protection — Automatic sprinkler systems — Part 3: Requirements and test methods for dry pipe valves
ISO 6182-3:2005 specifies performance, requirements, methods of test and marking requirements, for dry pipe valves and manufacturers' specified relevant trim used in dry pipe automatic fire protection systems. Performance and test requirements for other auxiliary components or attachments to dry pipe valves are not covered by ISO 6182-3:2005.
Protection contre l'incendie — Systèmes d'extinction automatiques du type sprinkler — Partie 3: Exigences et méthodes d'essai des postes de contrôle sous air
General Information
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 6182-3
Second edition
2005-10-15
Fire protection — Automatic sprinkler
systems —
Part 3:
Requirements and test methods for dry
pipe valves
Protection contre l'incendie — Systèmes d'extinction automatiques du
type sprinkler —
Partie 3: Exigences et méthodes d'essai des postes de contrôle sous air
Reference number
ISO 6182-3:2005(E)
©
ISO 2005
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ISO 6182-3:2005(E)
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ISO 6182-3:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Requirements . 4
5 Production testing and quality control. 11
6 Tests. 11
7 Marking . 18
8 Instruction charts and trim . 19
Bibliography . 20
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ISO 6182-3:2005(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.
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 6182-3 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 6182-3:1993), which has been technically
revised.
ISO 6182 consists of the following parts, under the general title Fire protection — Automatic sprinkler systems:
⎯ Part 1: Requirements and test methods for sprinklers
⎯ Part 2: Requirements and test methods for wet alarm valves, retard chambers and water motor alarms
⎯ Part 3: Requirements and test methods for dry pipe valves
⎯ Part 4: Requirements and test methods for quick-opening devices
⎯ Part 5: Requirements and test methods for deluge valves
⎯ Part 6: Requirements and test methods for check valves
⎯ Part 7: Requirements and test methods for early suppression fast response (ESFR) sprinklers
⎯ Part 8: Requirements and test methods for pre-action dry alarm valves
⎯ Part 9: Requirements and test methods for water mist nozzles
⎯ Part 10: Requirements and test methods for domestic sprinklers
⎯ Part 11: Requirements and test methods for pipe hangers
⎯ Part 12: Requirements and test methods for couplings for grooved end pipe couplings
⎯ Part 13: Requirements and test methods for extended coverage sprinklers
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ISO 6182-3:2005(E)
Introduction
This part of ISO 6182 is one of a number of ISO International Standards prepared by ISO/TC 21 covering
components for automatic sprinkler systems, including the following:
a) carbon dioxide systems (ISO 6183);
b) explosion suppression systems (ISO 6184).
An International Standard covering foam systems is planned.
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INTERNATIONAL STANDARD ISO 6182-3:2005(E)
Fire protection — Automatic sprinkler systems —
Part 3:
Requirements and test methods for dry pipe valves
1 Scope
This part of ISO 6182 specifies performance, requirements, methods of test and marking requirements, for dry
pipe valves and manufacturers’ specified relevant trim used in dry pipe automatic fire protection systems.
Performance and test requirements for other auxiliary components or attachments to dry pipe valves are not
covered by this part of ISO 6182.
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 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws
and studs
ISO 898-2, Mechanical properties of fasteners — Part 2: Nuts with specified proof load values — Coarse
thread
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
alarm device
mechanical or electrical device to sound an alarm upon operation of the valve
3.2
automatic drain valve
normally open device that automatically drains water from and vents the intermediate chamber of a valve to
the atmosphere when the valve is in the ready position, and limits water flow from the chamber after the valve
has tripped
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ISO 6182-3:2005(E)
3.3
clapper
type of sealing element
NOTE See also 3.17.
3.4
corrosion-resistant material
1)
metallic material of bronze, brass, Monel metal, austenitic stainless steel, or equivalent, or plastic material
conforming with the requirements of this document
3.5
differential
ratio of service pressure to system air pressure (expressed as gauge pressures) at the trip point
NOTE See also 3.23.
3.6
differential-type valve
type of valve in which air pressure in the system acts directly and/or indirectly on the sealing assembly to
maintain it in the closed position
NOTE The air seat of the sealing assembly is of equal or larger diameter than the diameter of the water seat of the
sealing assembly, with the two separated by an intermediate chamber maintained at atmospheric pressure.
3.7
dry pipe system
automatic fire protection system in which the piping contains air or nitrogen under pressure, the release of
which allows water from a water supply to discharge through the system
3.8
dry pipe valve
valve that controls the flow of water into a dry pipe sprinkler system and incorporates provision for actuation of
an alarm under specified conditions
3.9
flow velocity
speed of water flow through a valve expressed as the equivalent water velocity through a pipe of the same
nominal size as the valve
3.10
intermediate chamber
that part of a valve which separates the air and/or water sealing assembly seating surfaces and is at
atmospheric pressure when the valve is in the ready condition
3.11
leak point
system air pressure for a specific service pressure at which water begins to flow from the intermediate
chamber, automatic drain valve or alarm connection
3.12
mechanical-type valve
type of valve in which the air pressure in the system acts on the sealing assembly and linking mechanism to
maintain it in the closed position
1) Monel is an example of a suitable product available commercially. This information is given for the convenience of
users of this part of ISO 6182 and does not constitute an endorsement by ISO of this product.
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ISO 6182-3:2005(E)
3.13
priming water
water used to seal a sealing assembly and prevent cementation of working parts
3.14
rated working pressure
maximum service pressure at which a valve or retard chamber is intended to operate
3.15
ready (set) condition
state of a valve with the sealing assembly in the closed or set position with service and system pressure
applied
3.16
reinforced elastomeric element
element of clapper, clapper assembly or seat seals in a composite of an elastomeric compound with one or
more other components
3.17
sealing assembly
main movable sealing element (such as a clapper) of the valve which prevents the reverse flow of water and
which maintains air pressure in the system piping
3.18
sealing assembly seat ring
main fixed sealing element of a valve which prevents the reverse flow of water and which maintains air
pressure in the system piping
3.19
service pressure
static water pressure at the inlet to a valve when the valve is in the ready condition
3.20
system pressure
static water pressure at the main outlet of a valve when the valve is in the ready condition
3.21
system air pressure
static air pressure in the system piping when the valve is in the ready condition
3.22
trim
external equipment and pipework, excluding the main installation pipework, fitted to valve installation
assembly
3.23
trip point
point at which a valve operates, admitting water into the system, measured in terms of the system air pressure
at a given service pressure
3.24
water motor alarm
hydraulically actuated device which provides a local audible alarm as a result of a flow through a valve
3.25
water motor transmitter
hydraulically actuated device which generates an electrical current for a remote alarm as a result of operation
of the valve
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ISO 6182-3:2005(E)
4 Requirements
4.1 Nominal sizes
The nominal size of a valve shall be the nominal diameter of the inlet and outlet connections, i.e. the pipe size
for which the connections are intended. Sizes shall be 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 less than the nominal size.
4.2 Connections
4.2.1 All connections shall have been 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 International
Standards. If International Standards are not applicable, National standards shall be permitted to be used.
4.2.3 An opening not smaller than 15 mm nominal diameter shall be provided for an alarm line connection.
4.2.4 If priming water is required to seal the downstream side of the sealing assembly, an external means
shall be provided to introduce the priming water.
4.2.5 Means shall be provided to prevent water columning and to check the level of priming water.
4.2.6 Suitable means shall be provided to facilitate testing of alarms without tripping the valve.
4.2.7 Valves shall be provided with a means of sounding an alarm if water enters the downstream piping to
an elevation exceeding 0,5 m above the sealing assembly, unless the valve is provided with an automatic
means for drainage.
4.2.8 For differential-type valves, suitable means shall be provided to vent water from the intermediate
chamber and to prevent a partial vacuum between the upstream and downstream sealing elements of the
sealing assembly.
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 Inlet and outlet connections shall be permitted to be machined for lower working pressures to match
installation equipment provided the valve is marked with the lower working pressure. See 7.3 f).
4.4 Bodies and covers
4.4.1 The body and cover shall be made of a material having 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.
4.4.3 If non-metallic materials other than gaskets and seals or metals with a melting point less than 800 °C
form part of the body or cover, the valve assembly shall be subjected to a fire exposure test, as specified in
6.8. Following the fire exposure test, the sealing assembly shall open freely and fully and the valve shall
withstand a hydrostatic pressure test, as specified in 6.8.1, without permanent deformation or failure.
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.
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ISO 6182-3:2005(E)
4.5 Strength
4.5.1 An assembled 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 6.9.
4.5.2 If the test in accordance with 6.9 is not done 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 center
line 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 by one person with a minimum of down time.
4.7 Components
4.7.1 Any component which may normally be disassembled during servicing shall be designed so that it can
not be reassembled improperly without providing an external visual indication, when the valve is returned to
service.
4.7.2 With the exception of valve seats, all parts intended for field replacement shall be capable of being
disassembled and reassembled using tools normally employed by the trade.
4.7.3 All components shall be non-detachable during normal operation of the valve.
4.7.4 Failure of the sealing assembly diaphragms or seals shall not prevent the valve from opening.
4.7.5 Sealing surfaces of sealing assemblies shall have corrosion resistance equivalent to bronze and have
sufficient width of surface contact to withstand ordinary wear and tear, rough usage, compression stresses
and damage due to pipe scale or foreign matter carried by the water.
4.7.6 Springs and diaphragms shall not fracture or rupture during 5 000 cycles of normal operation, when
tested in accordance with 6.2.
4.7.7 There shall be no sign, on visual examination, of damage to the sealing assembly after testing for the
operational requirements of 4.14 in accordance with 6.11 and 6.12.
4.7.8 When wide open, the sealing assembly shall bear against a definite stop. The point of contact shall be
located so that impact or the reaction of the water will not permanently twist, bend or fracture valve parts.
4.7.9 Where rotation or sliding motion is required, the part or its bearing shall be made of a corrosion
resistant material. Materials lacking corrosion resistance shall be fitted with bushings, inserts or other parts
made of corrosion resistant materials at those points where freedom of movement is required.
4.7.10 A valve having a differential of the sealing assembly exceeding 1,16 to 1 for a service pressure range
of 0,14 to 1,2 MPa (1,4 bar to 12 bar) shall be provided with an anti-seat latch that prevents the valve from
resetting automatically. The valve shall require manual means to return the valve to the ready (set) condition.
It shall not be possible to return the valve to the ready (set) condition before draining the pipe work.
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ISO 6182-3:2005(E)
4.7.11 A valve having a differential of 1,16 to 1 or less over a service pressure range of 0,14 MPa to 1,2 MPa
(1,4 bar to 12 bar) shall be provided with means to prevent the valve from automatically returning to the ready
(set) condition and to permit draining of the pipework after the valve has tripped. Manual or external means
shall be provided to return the valve to the ready (set) condition.
4.8 Leakage
4.8.1 There shall be no leakage, permanent distortion or rupture of a valve, when an internal pressure of
twice the rated working pressure is applied for 5 min with the sealing assembly open in accordance with 6.8.1.
4.8.2 No leakage shall be permitted across the sealing assembly into the intermediate chamber or into the
alarm port, when tested in accordance with 6.8.2. There shall be no leakage, permanent distortion or rupture
of a valve at an internal pressure of twice the rated working pressure applied to the upstream side of the
sealing assembly for 2 h with the downstream end pressurized in accordance with 6.8.2
4.8.3 Mechanical type valves shall show no signs of leakage, permanent distortion or structural failure when
subjected to an internal hydrostatic pressure of twice the rated working pressure applied for a period of 2 h to
the upstream end of the valve with the sealing assembly closed and the downstream end vented in
accordance with 6.8.3. Following this test, the valve shall operate in accordance with 4.14, when tested once
in accordance with 6.11.2 at a service pressure of 0,2 MPa (2 bar).
4.8.4 Valves fitted with a latch shall withstand, without leakage, permanent distortion or structural failure, an
internal hydrostatic pressure of twice the maximum air pressure specified by the manufacturer for a period of
5 minutes applied to the downstream side of the valve with the sealing assembly closed and the upstream end
vented in accordance with 6.8.4. Following this test, the valve shall operate in accordance with 4.14, when
tested once in accordance with 6.11.2 at a service pressure of 0,2 MPa (2 bar).
4.8.5 Valves not fitted with a latch shall withstand, without leakage, permanent distortion or structural failure,
an internal hydrostatic pressure of twice the rated working pressure for a period of 5 min applied to the
downstream side of the valve with the sealing assembly closed and the upstream end vented in accordance
with 6.8.4. Following this test, the valve shall operate in accordance with 4.14 when tested once in accordance
with 6.11.2 at a service pressure of 0,2 MPa (2 bar).
4.9 Non-metallic components (excluding gaskets, seals and other elastomeric parts)
4.9.1 Non-metallic valve parts that affect proper valve function shall be subjected to the applicable ageing of
its non-metallic parts as described in 6.4 and 6.5 using separate sets of samples, as applicable. After ageing,
a valve shall meet the requirements of 4.8, 4.13 and 4.14.4, when tested in accordance with the applicable
tests described in 6.6, 6.8 and 6.11.
4.9.2 There shall be no cracking, warping, creep, or other signs of deterioration which could preclude
proper operation of the valve.
4.10 Sealing assembly elements
4.10.1 A seal made of elastomeric or other resilient materials shall not adhere to the mating surface when
tested in accordance with 6.3.1. Where the same design of seat is used for more than one size of valve, it
shall be permitted to only test the size with the highest stress on the seating surface.
4.10.2 Any non-reinforced elastomer forming the seal shall have the following properties, when tested in
accordance with 6.3.2 and the appropriate sections of ISO 37:
a) maximum set of 5 mm when 25 mm long marks are stretched to 75 mm, held for 2 min, and measured
2 min after release;
b) either:
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ISO 6182-3:2005(E)
1) minimum tensile strength 10 MPa (100 bar) and minimum ultimate elongation 300 % (25 mm to
100 mm); or
2) minimum tensile strength 15 MPa (150 bar) and minimum ultimate elongation 200 % (25 mm to
75 mm);
c) after exposure to oxygen for 96 h at (70 ± 1,5) °C and 2,0 MPa (20 bar), the tensile strength and ultimate
elongation shall be not less than 70 % of the corresponding properties of specimens which have not been
heated in oxygen, and any change in hardness shall not be greater than 5 type-A durometer units;
d) after immersion in distilled water for 70 h at (97,5 ± 2,5) °C, the tensile strength and ultimate elongation
shall not be less than 70 % of the corresponding properties of specimens which have not been heated in
water and the change in volume of the specimens shall be not greater than 20 %.
4.10.3 A reinforced elastomeric sealing element shall be capable of being flexed, without cracking or
breaking, and shall have a change in volumetric expansion not greater than 20 % when tested in accordance
with 6.3.3.
4.10.4 Sealing surfaces shall prevent leakage of water into the alarm port, when the valve is tested in the
ready position in accordance with 6.10.
4.10.5 For a composite of an elastomeric compound with one or more other components, the tensile strength
of the combination shall be at least twice that of the elastomeric material alone.
4.11 Clearances
4.11.1 The radial clearance between a hinged sealing assembly and the inside walls in every position except
wide open shall not be less than 12 mm for cast iron bodies and shall not be less than 6 mm if the body and
sealing assembly are of cast iron or steel with corrosion protective coatings tested in accordance with 6.14,
non-ferrous material, stainless steel or materials having equivalent physical, mechanical and corrosion
resistant properties. See Figure 1 a).
4.11.2 There shall be a diametrical clearance of not less than 6 mm between the inner edges of a seat ring
and the metal parts of a hinged sealing assembly when the valve is in the closed position. See Figure 1 b).
4.11.3 Any space in which the sealing assembly can trap debris beyond the seat shall be not less than 3 mm
deep.
4.11.4 The diametrical clearance (D − D ) between hinge pins and their bearings shall be not less than
2 1
0,125 mm. See Figure 1b).
4.11.5 The total axial clearance between the clapper hinge and adjacent valve body bearing surfaces shall
be not less than 0,25 mm. See Figure 1 c).
4.11.6 Any reciprocating guide components, which are essential to allow a valve to open, shall have a
minimum diametrical clearance of not less than 0,7 mm in that portion over which the moving component
enters the fixed component and of not less than 0,05 mm in that portion of the moving component
continuously in contact with the fixed component in the ready (set) position.
4.11.7 Sealing assembly guide bushings or hinge-pin bearings shall project a sufficient axial distance to
maintain not less than 1,5 mm (clearance A) clearance between ferrous metal parts. See Figure 1. Clearance
less than 1,5 mm shall be permitted where adjacent parts are of bronze, brass, Monel metal, austenitic
stainless steel, titanium, or similar corrosion resistant materials. When corrosion resistance of steel parts is
provided by a protective coating, the parts shall show no visible signs of deterioration of the coating such as
blistering, delamination, flaking or increased resistance to movement when tested in accordance with 6.14.
4.11.8 If provided, a compensator shall be designed such that deposits or sediment will not readily
accumulate to an extent sufficient to interfere with its proper operation. There shall be sufficient clearances
between the working parts to allow proper sealing of the main and any auxiliary valves.
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ISO 6182-3:2005(E)
a) Radial clearance, C = R − R b) Diametrical clearance, C = D − D
R 2 1 D 2 1
Key
1 valve body
2 pin
3 sealing assembly
4 bushings
c) Total axial clearance, C
TA
C = L − L ; Clearance A = (L − L )/2
TA 2 3 3 2
Figure 1 — Types of clearances (continued)
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ISO 6182-3:2005(E)
Key
1 valve body
2 pin
3 sealing assembly
4 bushings
d) Inside bushing dimensions
C = (L − L )/2 + (L − L )/2
TA 3 2 4 1
Figure 1
4.12 Hydraulic friction loss
The maximum pressure loss across the valve at the appropriate flow given in Table 1, as tested by the
method of 6.6, shall not exceed 0,08 MPa (0,8 bar). If the pressure loss exceeds 0,02 MPa (0,2 bar), the
pressure loss shall be marked on the valve. See 7.3 j).
Table 1 — Required flow rates for pressure drop determination
Nominal size Flow rate
mm l/min
40 380
50 590
65 1 000
80 1 510
100 2 360
125 3 860
150 5 300
200 9 920
250 14 720
300 21 200
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ISO 6182-3:2005(E)
4.13 Endurance
The valve and its moving parts shall show no sign of distortion, cracks, loosening, separation or other sign of
failure, following 30 min of water flow in accordance with 6.11.
4.14 Operational performance
4.14.1 A dry pipe valve with associated trim shall operate and provide an indication of operation at any
service pressure within the ranges of 0,14 MPa (1,4 bar) to rated working pressure with the mechanical and/or
electrical alarm devices pressurized to at least 0,05 MPa (0,5 bar), when tested in accordance with 6.11. The
alarm devices shall sound for more than 50 % of the time for all flow conditions through a tripped valve.
4.14.2 A differential-type valve shall have a working differential within the range of 5:1 to 8,5:1 at 0,14 MPa
(1,4 bar) service pressure and within the range of 5:1 to 6,5:1 at all higher service pressures, when tested in
accordance with 6.11.
4.14.3 A mechanical-type dry pipe valve shall operate at an air pressure between 0,025 MPa (0,25 bar) and
a fifth of the rated working pressure for all water pressures from 0,14 MPa (1,4 bar) to the rated working
pressure, when tested in accordance with 6.11.
4.15 Drains
4.15.1 The valve shall be provided with a tapped opening to drain water from the valve body, when the valve
is installed in any position specified or recommended by the manufacturer. The minimum opening size shall
be 20 mm no
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