ISO 4642-1:2015

INTERNATIONAL ISO
STANDARD 4642-1
Second edition
2015-12-01
Rubber and plastics hoses, non-
collapsible, for fire-fighting service —
Part 1:
Semi-rigid hoses for fixed systems
Tuyaux en caoutchouc et en plastique, non aplatissables, pour la lutte
contre l’incendie —
Partie 1: Tuyaux semi-rigides pour systèmes fixes
Reference number
ISO 4642-1:2015(E)
©
ISO 2015

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ISO 4642-1:2015(E)

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© ISO 2015, Published in Switzerland
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ISO 4642-1:2015(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification . 2
4.1 General . 2
4.2 Classification by types (hose construction) . 2
4.3 Classification by class (materials for lining and cover) . 2
5 Dimensions, tolerances and maximum mass . 3
5.1 Inside diameter and maximum mass. 3
5.2 Length and tolerances on length . 3
6 Performance requirements of finished hose . 3
6.1 Hydrostatic requirements . 3
6.1.1 Deformation under maximum working pressure . 3
6.1.2 Deformation under proof pressure . 3
6.1.3 Minimum burst pressure . 4
6.1.4 Kink pressure . 4
6.2 Adhesion . 4
6.3 Accelerated ageing . 4
6.4 Low temperature flexibility . 4
6.5 Hot surface resistance . 4
6.6 Ozone resistance. 4
6.7 Bending and crush resistance . 5
6.8 UV resistance (xenon arc lamp) . 5
6.9 Loss in mass on heating . 5
7 Frequency of testing . 5
8 Type tests . 5
9 Test report . 5
10 Recommendation for packaging and storage . 5
11 Marking . 5
Annex A (normative) Kink pressure test . 7
Annex B (normative) Accelerated ageing test . 8
Annex C (normative) Hot surface resistance test . 9
Annex D (normative) Bending and crush resistance test .14
Annex E (normative) Type test and routine test .16
Annex F (informative) Production test .17
Bibliography .18
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ISO 4642-1:2015(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 45, Rubber and rubber products, Subcommittee
SC 1, Rubber and plastics hoses and hose assemblies.
This second edition cancels and replaces the first edition (ISO 4642-1:2009), of which it constitutes a
minor revision.
ISO 4642 consists of the following parts, under the general title Rubber and plastics hoses, non-collapsible,
for fire-fighting service:
— Part 1: Semi-rigid hoses for fixed systems
— Part 2: Semi-rigid hoses (and hose assemblies) for pumps and vehicles
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ISO 4642-1:2015(E)

Introduction
A fixed system is a manually operated unit installed in a building in order to make it possible for the
occupants to control and extinguish a small fire. The system consists of fixed units mounted on walls
or in cabinets permanently connected to a water supply. The fixed units are composed of a coupling, a
valve, a semi-rigid water-filled hose with its support and a nozzle.
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INTERNATIONAL STANDARD ISO 4642-1:2015(E)
Rubber and plastics hoses, non-collapsible, for fire-
fighting service —
Part 1:
Semi-rigid hoses for fixed systems
1 Scope
This part of ISO 4642 specifies the requirements and test methods for semi-rigid reel hoses for fire-
fighting purposes for use with fixed systems. The hoses are intended for use at a maximum working
pressure of 1,2 MPa for hoses of 19 mm and 25 mm inside diameter and 0,7 MPa for hoses of 33 mm
inside diameter.
Hoses conforming to this part of ISO 4642 are intended for applications where long intervals can
occur between the occasions of use, for example on fixed fire hose reels in buildings and other
construction works.
This part of ISO 4642 applies exclusively to hoses for fire-fighting purposes intended for use at
ambient conditions in non-aggressive or non-corrosive atmospheres within the temperature range
−20 °C to +60 °C.
NOTE 1 Hoses for use at temperatures lower than −20 °C can be supplied at the request of the purchaser.
NOTE 2 All pressures are expressed in megapascals where 1 MPa = 10 bar.
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 176:2005, Plastics — Determination of loss of plasticizers — Activated carbon method
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 1307, Rubber and plastics hoses — Hose sizes, minimum and maximum inside diameters, and tolerances
on cut-to-length hoses
ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing
ISO 4671, Rubber and plastics hoses and hose assemblies — Methods of measurement of the dimensions of
hoses and the lengths of hose assemblies
ISO 7326:2006, Rubber and plastics hoses — Assessment of ozone resistance under static conditions
ISO 8033, Rubber and plastics hose — Determination of adhesion between components
ISO 8330, Rubber and plastics hoses and hose assemblies — Vocabulary
ISO 8331, Rubber and plastics hoses and hose assemblies — Guidelines for selection, storage, use and
maintenance
ISO 10619-2:2011, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness —
Part 2: Bending tests at sub-ambient temperatures
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ISO 4642-1:2015(E)

3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8330 and the following apply.
3.1
semi-rigid hose
hose that maintains its round cross-section even when unpressurized
4 Classification
4.1 General
All types and classes of hose shall be so flexible that they can be rolled and kept on a drum of minimum
diameter 200 mm for 19 mm inside diameter and 25 mm inside diameter hose and of minimum diameter
280 mm for 33 mm inside diameter hose.
Hoses shall be one of two types distinguished by their construction. Each hose type shall be further
divided into classes distinguished by the materials used for lining and cover.
4.2 Classification by types (hose construction)
4.2.1 Type A hoses shall consist of:
a) a seamless rubber or plastics lining;
b) a textile reinforcement with or without a rigid spiral helix;
c) a rubber or plastics cover.
4.2.2 Type B hoses shall consist of:
a) a seamless rubber or plastics lining;
b) a circular woven textile reinforcement with a rigid spiral helix;
c) an uncovered or rubber or plastics cover.
4.3 Classification by class (materials for lining and cover)
The hose types shall be further subdivided into six classes dependent on the materials used in their
construction, in accordance with Table 1.
Table 1 — Classes and materials
Class Lining material Cover material
1 rubber rubber
2 plastics plastics
3 rubber plastics
4 plastics rubber
5 rubber no cover
6 plastics no cover
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ISO 4642-1:2015(E)

5 Dimensions, tolerances and maximum mass
5.1 Inside diameter and maximum mass
The inside diameter of the hose, when measured in accordance with ISO 4671, shall conform to the
requirements given in Table 2. The mass per metre length of the hose shall be in accordance with Table 2.
Table 2 — Inside diameter, tolerances on inside diameter and maximum mass per unit length
Inside diameter Tolerances for inside Mass per unit length
diameter
kg/m
mm mm Type A Type B
max. max.
19 −0,5 to +1,0 0,75 0,25
25 ±1,0 0,90 0,35
33 −1,0 to +1,5 1,00 0,50
5.2 Length and tolerances on length
The total length of hose supplied shall be in accordance with the purchaser’s requirements and shall be
stated in metres. Tolerance on length shall be in accordance with ISO 1307.
6 Performance requirements of finished hose
6.1 Hydrostatic requirements
6.1.1 Deformation under maximum working pressure
The dimensional stability of the hose, when tested in accordance with ISO 1402, shall conform to the
requirements given in Table 3. The length of the test piece shall be 1 m.
For 19 mm and 25 mm inside diameter hoses, the initial test pressure shall be 0,07 MPa and the final test
pressure shall be 1,2 MPa. For 33 mm inside diameter hose, the initial test pressure shall be 0,07 MPa
and the final test pressure shall be 0,7 MPa.
–1 –1
The twist shall be no greater than 30° m for type A. For type B, the twist may be greater than 30° m but
...