ISO 6182-12:2014

INTERNATIONAL ISO
STANDARD 6182-12
Second edition
2014-12-15
Fire protection — Automatic
sprinkler systems —
Part 12:
Requirements and test methods for
grooved-end components for steel
pipe systems
Protection contre l’incendie — Systèmes d’extinction automatiques du
type sprinkler —
Partie 12: Exigences et méthodes d’essai pour les raccords de
tuyauterie en acier à extrémités rainurées
Reference number
ISO 6182-12:2014(E)
©
ISO 2014

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ISO 6182-12:2014(E)

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ISO 6182-12:2014(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Product consistency . 2
5 Product assembly. 2
6 Requirements . 3
6.1 Standard grooved-end dimensions . 3
6.2 Minimum pipe wall thickness . 3
6.3 Mechanical coupling housing . 3
6.4 Pressure-responsive gasket . 3
6.5 Bolts . 3
6.6 Nuts . 8
6.7 Hinge pins . 8
6.8 Flexible coupling . 8
6.9 Vacuum (see 7.2) . 8
6.10 Air leakage (see 7.3) . 8
6.11 Low-temperature exposure (see 7.4) . 8
6.12 Heat ageing (see 7.5) . 8
6.13 Hydrostatic pressure (see 7.6) . 8
6.14 Bending moment (see 7.7) . 8
6.15 Gasket material evaluation . 8
6.16 Fire resistance (see 7.8) . 9
6.17 Rated working pressure . 9
6.18 Nominal sizes . 9
7 Test methods . 9
7.1 Test assembly . 9
7.2 Vacuum (see 6.9) . 9
7.3 Air leakage (see 6.10) .10
7.4 Low-temperature exposure (see 6.11) .10
7.5 Heat aging (see 6.12) .10
7.6 Hydrostatic pressure test (see 6.13) .11
7.7 Bending moment (see 6.14) .11
7.8 Fire resistance (see 6.16) .15
8 Markings .15
8.1 Housing markings .15
8.2 Gasket markings .15
8.3 Manufacturer’s installation instructions .16
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ISO 6182-12:2014(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 WTO principles in the Technical Barriers
to Trade (TBT), see the following URL: Foreword — Supplementary information.
The committee responsible for this document is ISO/TC 21, Equipment for fire protection and firefighting,
Subcommittee SC 5, Fixed firefighting systems using water.
This second edition cancels and replaces the first edition (ISO 6182-12:2010), 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 grooved-end components for steel pipe systems
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ISO 6182-12:2014(E)

Introduction
This part of ISO 6182 is one of a number of International Standards prepared by ISO/TC 21 covering
components for automatic sprinkler systems.
They are included in a series of International Standards planned to cover the following:
a) carbon dioxide systems (ISO 6183);
b) explosion protection systems (ISO 6184).
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INTERNATIONAL STANDARD ISO 6182-12:2014(E)
Fire protection — Automatic sprinkler systems —
Part 12:
Requirements and test methods for grooved-end
components for steel pipe systems
1 Scope
This part of ISO 6182 specifies performance requirements, grooving dimensions, test methods, and
marking requirements for couplings used in the joining of roll and cut grooved steel tube, pipe, grooved-
end fittings, and other grooved-end components up to 300 mm in nominal diameter.
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 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 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 1083, Spheroidal graphite cast irons — Classification
ISO 4200:1991, Plain end steel tubes, welded and seamless — General tables of dimensions and masses
per unit length
ASTM A47/A47M-99(2004), Standard Specification for Ferritic Malleable Iron Castings
ASTM A153/A153M, Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
ASTM A183, Standard Specification for Carbon Steel Track Bolts and Nuts
ASTM A536-84(2004), Standard Specification for Ductile Iron Castings
ASTM A563-07a, Standard Specification for Carbons and Alloy Steel Nuts
ASTM B633-07, Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel
ASTM D395-03, Standard Test Methods for Rubber Property — Compression Set
EN 12329, Corrosion protection of metals — Electrodeposited coatings of zinc with supplementary treatment
on iron or steel
VdS 2100-6:2002-5(01), Guidelines for water extinguishing systems — Pipe joints — Requirements and test
methods
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ISO 6182-12:2014(E)

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
grooved-end components
pipe, tubes, fittings, and other components that are used to form grooved mechanical coupling joints
3.2
mechanical coupling
device consisting of two or more housings, fasteners such as bolts and nuts and a pressure-responsive
gasket, used to mechanically join grooved pipe, tubing, valves, fittings, and other grooved-end
components to form a sealed joint
3.2.1
flexible mechanical coupling
mechanical coupling forming a sealed joint in which there is limited angular, axial, and rotational
movement without overstressing the pipe joint
Note 1 to entry: See 6.8.
3.2.2
rigid mechanical coupling
mechanical coupling forming a sealed joint in which there is essentially no free angular, axial, or
rotational movement
3.3
mechanical coupling housing
structural parts of a mechanical coupling that mechanically fit onto grooved pipes, tubes, fittings, and
other grooved-end components to provide restraint and enclosure of the gasket
3.4
OD
outside diameter
3.5
pressure-responsive gasket
gasket that improves its seal with the application of pressure; that is, additional pressure results in
additional force between the gasket and the surface to which it is sealing
3.6
rated working pressure
maximum service pressure at which a grooved piping system is intended to operate
4 Product consistency
It shall be the responsibility of the manufacturer to implement a quality-control programme to ensure
that production consistency meets the requirements of this part of ISO 6182 in the same manner as the
originally tested samples.
5 Product assembly
Installation instructions shall be provided by the manufacturer and shall include at least the following:
a) assembly procedure for the installation of couplings;
b) grooved-end component specifications, with which the coupling is intended to be used, including
minimum pipe wall thickness;
c) bolt torque specification, where required by the manufacturer;
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ISO 6182-12:2014(E)

d) maximum allowable movement for flexible couplings;
e) specification for permissible media within the pipe in conjunction with the gasket material (see 8.2
for colour codes).
6 Requirements
6.1 Standard grooved-end dimensions
NOTE This clause gives standard dimensions for grooved ends that the coupling manufacturer may refer to
if he does not need to specify special dimensions for the grooved ends compatible to his coupling. Couplings for
grooved ends of special dimensions may be subjected to special tests to determine their suitability.
6.1.1 Roll grooved-end dimensions
The standard dimensions of roll grooved ends shall be in accordance with Table 1. See also Figure 1.
6.1.2 Cut grooved-end dimensions
The standard dimensions of cut grooved ends shall be in accordance with Table 2. See also Figure 2.
6.1.3 Cast grooved-end dimensions
The standard dimensions of cast grooved ends shall be in accordance with Table 3.
6.2 Minimum pipe wall thickness
6.2.1 Grooved-end pipe couplings tested in accordance with 7.7.1 shall be tested with pipe according to
ISO 4200:1991, Table 1; range D. Pipe with higher wall thickness may be used, if this corresponds to the
minimum wall thickness specified by the manufacturer.
6.2.2 Grooved-end pipe couplings tested in accordance with 7.7.2 shall be tested with pipe having the
minimum nominal wall thickness specified in the manufacturer’s installation instructions.
6.3 Mechanical coupling housing
The casting materials of the housings shall be ductile iron in accordance with ISO 1083, Grade 400-15;
ASTM A536-84(2004), Grade 65-45-12 or malleable iron in accordance with ASTM A47/A47M-99(2004),
Grade 32510 or 32518; or material having equivalent strength and corrosion resistance. When requested
on purchase order, the housing shall be galvanized in accordance with ASTM A153/A153M or EN 12329.
6.4 Pressure-responsive gasket
Materials for the coupling gaskets shall be ethylene-propylene diene m-class-rubber (EPDM), nitrile,
silicone rubber, or other elastomeric materials suitable for the intended service.
6.5 Bolts
Oval neck track head bolts shall be in accordance with ISO 898-1, Class 8.8, heavy hex bolts in accordance
with ASTM A183 or other bolts which prevent rotation and have a minimum tensile strength of
2
800 N/mm . Bolts shall be zinc plated in accordance with ASTM B633-07, SC1 or EN 12329, or be of a
material that provides at least equivalent corrosion resistance.
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ISO 6182-12:2014(E)

Table 1 — Roll grooved-end dimensional specifications
Dimensions in millimetres
Pipe or tube (OD)
Dimensional specifications
tolerance
Gasket Groove Grooved diameter Min. allow. Max.
Outside diameter Groove
seat width C wall flare
Size depth
A B thickness F
a
Actual Tolerance Actual Tolerance D
+/-0,76 +/-0,76 T Dia.
+0,41
25 33,7 15,88 7,14 30,23 -0,38 1,60 1,8 36,3
-0,68
+0,50
32 42,4 15,88 7,14 38,99 -0,38 1,60 1,8 45,0
-0,60
+0,44
40 48,3 15,88 7,14 45,09 -0,38 1,60 1,8 51,1
-0,52
50 60,3 -0,61 15,88 8,74 57,15 -0,38 1,60 1,8 63,0
65 73,0 -0,74 15,88 8,74 69,09 -0,46 1,98 2,3 75,7
65 76,1 -0,76 15,88 8,74 72,26 -0,46 1,98 2,3 78,7
+0,89
80 88,9 15,88 8,74 84,94 -0,46 1,98 2,3 91,4
-0,79
+1,02
90 101,6 15,88 8,74 97,38 -0,51 2,11 2,3 104,1
-0,79
+1,07
100 108,0 15,88 8,74 103,73 -0,51 2,11 2,3 110,5
-0,79
+1,14
100 114,3 15,88 8,74 110,08 -0,51 2,11 2,3 116,8
-0,79
+1,3
...