ISO 20766-18:2019
(Main)Road vehicles — Liquefied petroleum gas (LPG) fuel systems components — Part 18: Hose
Road vehicles — Liquefied petroleum gas (LPG) fuel systems components — Part 18: Hose
This document specifies general information regarding the hose component of liquefied petroleum gas fuel, intended for use on the types of motor vehicles as defined in ISO 3833. It provides general design principles and specifies requirements for instructions and marking. It also specifies test requirements for the hose. This document is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using gaseous fuels in accordance with ISO 9162. It is not applicable to the following: a) fuel containers; b) stationary gas engines; c) container mounting hardware; d) electronic fuel management; e) refuelling receptacles. Fully metal bendable hoses are excluded from this document. NOTE 1 It is recognized that miscellaneous components not specifically addressed herein can be examined for compliance with the criteria of any applicable part of ISO 20766, including testing to the appropriate functional tests. NOTE 2 All references to pressure in this document are considered gauge pressures unless otherwise specified. NOTE 3 This document applies to devices which have a service pressure in the range of 110 kPa (Butane rich at 20 °C) and 840 kPa (Propane at 20 °C), hereinafter referred to in this document. Other service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio).
Véhicules routiers — Équipements pour véhicules utilisant le gaz de pétrole liquéfié (GPL) comme combustible — Partie 18: Tuyauterie
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 20766-18
First edition
2019-10
Road vehicles — Liquefied petroleum
gas (LPG) fuel systems components —
Part 18:
Hose
Véhicules routiers — Équipements pour véhicules utilisant le gaz de
pétrole liquéfié (GPL) comme combustible —
Partie 18: Tuyauterie
Reference number
ISO 20766-18:2019(E)
©
ISO 2019
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ISO 20766-18:2019(E)
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ii © ISO 2019 – All rights reserved
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ISO 20766-18:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Markings . 2
5 Construction and assembly . 2
5.1 General specifications . 2
5.2 Rubber hose construction . 3
5.3 Synthetic hose construction . 3
5.4 Couplings for rubber hoses . 3
5.5 Couplings for synthetic hoses . 4
5.6 Assembly of hose and couplings . 4
6 Tests . 4
6.1 Applicability . 4
6.2 Hydrostatic strength . 5
6.3 Low temperature. 5
6.4 High temperature. 5
6.5 Tensile strength and elongation . 5
6.6 Permeability . 6
6.7 Bending test . 6
6.7.1 Bending test for rubber hoses . 6
6.7.2 Bending test for synthetic hoses . 7
6.8 Impulse test . 8
6.9 Gas-tightness . 9
Bibliography .10
© ISO 2019 – All rights reserved iii
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ISO 20766-18:2019(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 22, Road vehicles, Subcommittee SC 41,
Specific aspects for gaseous fuels.
A list of all parts in the ISO 20766 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.
iv © ISO 2019 – All rights reserved
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INTERNATIONAL STANDARD ISO 20766-18:2019(E)
Road vehicles — Liquefied petroleum gas (LPG) fuel
systems components —
Part 18:
Hose
1 Scope
This document specifies general information regarding the hose component of liquefied petroleum gas
fuel, intended for use on the types of motor vehicles as defined in ISO 3833. It provides general design
principles and specifies requirements for instructions and marking. It also specifies test requirements
for the hose.
This document is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using gaseous fuels
in accordance with ISO 9162. It is not applicable to the following:
a) fuel containers;
b) stationary gas engines;
c) container mounting hardware;
d) electronic fuel management;
e) refuelling receptacles.
Fully metal bendable hoses are excluded from this document.
NOTE 1 It is recognized that miscellaneous components not specifically addressed herein can be examined
for compliance with the criteria of any applicable part of ISO 20766, including testing to the appropriate
functional tests.
NOTE 2 All references to pressure in this document are considered gauge pressures unless otherwise
specified.
NOTE 3 This document applies to devices which have a service pressure in the range of 110 kPa (Butane rich
at 20 °C) and 840 kPa (Propane at 20 °C), hereinafter referred to in this document. Other service pressures can
be accommodated by adjusting the pressure by the appropriate factor (ratio).
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 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and
extrusion plastics
ISO 1307:2006, Rubber and plastics hoses — Hose sizes, minimum and maximum inside diameters, and
tolerances on cut-to-length hoses
ISO 1436, Rubber hoses and hose assemblies — Wire-braid-reinforced hydraulic types for oil-based or
water-based fluids — Specification
© ISO 2019 – All rights reserved 1
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ISO 20766-18:2019(E)
ISO 4080, Rubber and plastics hoses and hose assemblies — Determination of permeability to gas
ISO 20766-1, Road vehicles — Liquefied petroleum gas (LPG) fuel systems components — Part 1: General
requirements and definitions
ISO 20766-2, Road vehicles — Liquefied petroleum gas (LPG) fuel systems components — Part 2:
Performance and general test methods
DIN 7643, Compression couplings — Hollow screws for ring-type banjos
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 20766-1 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/
4 Markings
Every hose shall bear, at intervals of not greater than 0,5 m, the following clearly legible and indelible
identification markings consisting of characters, figures or symbols.
a) the manufacturer’s or agent’s name, trademark or symbol;
b) the model designation (part number);
c) the working pressure and temperature range;
d) the year and month of fabrication;
e) the size and type-marking.
The following additional markings are recommended:
— the direction of flow (when necessary for correct installation);
— the type of fuel;
— the electrical ratings (if applicable);
— the symbol of the certification agency;
— the type approval number;
— the serial number or date code;
— a reference to this document.
NOTE Every coupling bears the trade name or mark of the assembling manufacturer.
5 Construction and assembly
5.1 Ge
...
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