ISO/FDIS 19013-1

Rubber hoses and tubing for fuel circuits for internal combustion engines — Specification — Part 1: Diesel fuels

This document specifies the requirements for rubber tubing and hoses used in diesel fuel circuits for internal combustion engines. The diesel fuels covered include "bio-diesels" which consist of the methyl ester of rape seed oil at levels up to 20 % by volume in conventional diesel fuels. This document can also be applied as a classification system to enable original equipment manufacturers (OEMs) to detail a "line call-out" of tests for specific applications where these are not covered by the main types specified (see example in Annex E). In this case, the hose or tubing would not carry any marking showing the number of this document but can detail the OEM's own identification markings as shown on their part drawings.

Tuyaux de caoutchouc et flexibles pour les circuits de carburant pour les moteurs à combustion interne — Spécifications — Partie 1: Carburants diesel

General Information

• Status: Not Published
• ICS: 27.020 - Internal combustion engines
• ICS: 83.140.40 - Hoses
• Technical Committee: ISO/TC 45/SC 1 - Rubber and plastics hoses and hose assemblies
• Drafting Committee: ISO/TC 45/SC 1/WG 2 - Automotive hoses
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 24-Apr-2026
• Completion Date: 24-Apr-2026

Relations

• Revises: ISO 19013-1:2019 - Rubber hoses and tubing for fuel circuits for internal combustion engines — Specification — Part 1: Diesel fuels
• Effective Date: 07-Jan-2025

Overview

ISO/FDIS 19013-1:2026 establishes the specifications for rubber hoses and tubing intended for use in diesel fuel circuits of internal combustion engines. Developed by ISO Technical Committee TC 45/SC 1, this international standard defines key requirements for dimensional tolerances, classification of hose and tubing, and a wide range of performance characteristics. The document also encompasses the suitability of these products for conventional diesel as well as biodiesel blends (up to 20% methyl ester of rapeseed oil by volume). ISO/FDIS 19013-1 serves as both a product standard and a classification system, supporting original equipment manufacturers (OEMs) in detailing tests for specialized applications.

Key Topics

• Scope and Fuel Compatibility
  The standard covers rubber hoses and tubing specifically for diesel fuel systems, including those compatible with biodiesel blends up to 20%. It focuses on requirements for materials, dimensions, and identification marking.

• Classification System
  ISO/FDIS 19013-1 outlines a classification framework that accommodates various types and classes of hoses and tubing used in pressurized and non-pressurized circuits, suitable for different locations in the vehicle (e.g., from the fuel tank to the engine compartment).

• Performance Requirements
  Key performance tests referenced in the standard include:

  • Burst pressure and adhesion between layers
  • Low-temperature flexibility and heat ageing resistance
  • Internal cleanliness and extractable substances
  • Ozone resistance, resistance to fuels, oil, hydraulic fluid, and contamination
  • Tear resistance (for tubing), burn-through resistance, kinking and suction resistance
  • Electrical resistance and life-cycle durability testing

• Testing and Quality Control
  The document specifies procedures for type approval, routine, and production acceptance testing, ensuring consistent product quality.

• OEM Applications
  The classification and testing system allows OEMs to specify customized test regimes for unique designs not covered by the main standard types, supporting detailed “line call-out” specifications.

Applications

ISO/FDIS 19013-1 finds widespread use in:

• Automotive and Heavy-Duty Engine Manufacturing
  Ensuring the reliability and safety of fuel hoses and tubing in passenger vehicles, commercial trucks, agricultural, and construction equipment.

• OEM Specification and Procurement
  Supporting manufacturers and suppliers in standardizing product requirements, simplifying procurement, and ensuring interchangeability and compliance with global regulations.

• Design and Development
  Guiding engineers in selecting and testing materials and constructions suitable for diesel and biodiesel compatibility, operating temperatures, and pressure conditions.

• Quality Assurance
  Providing a basis for routine inspection, batch release, and type approval protocols, thereby reducing field failures and warranty claims.

Related Standards

For comprehensive fuel system compatibility and testing, consider these relevant international and industry standards:

• ISO 188: Accelerated ageing and heat resistance of rubber
• ISO 1402: Hydrostatic testing of rubber and plastics hoses/hose assemblies
• ISO 1817: Determination of liquid effects on vulcanized/thermoplastic rubber
• ISO 4671: Measurement of hose dimensions and lengths
• EN 14214: Requirements for fatty acid methyl esters (FAME) for diesel engines
• SAE J2260 and SAE J2027: Fuel system tubing and protective covers

Manufacturers, suppliers, and OEMs are encouraged to reference these related documents for aligning hose and tubing products with best practices in fuel system design, testing, and compliance.

---

Keywords: ISO/FDIS 19013-1, rubber fuel hoses, diesel engine tubing, biodiesel compatibility, OEM fuel circuit standard, hose performance requirements, fuel system testing, automotive hoses, internal combustion engines, international standards.

Standards Content (Sample)

FINAL DRAFT
International
Standard
ISO/TC 45/SC 1
Rubber hoses and tubing for fuel
Secretariat: DIN
circuits for internal combustion
Voting begins on:
engines — Specification —
2026-04-24
Part 1:
Voting terminates on:
2026-06-19
Diesel fuels
Tuyaux de caoutchouc et flexibles pour les circuits de carburant
pour les moteurs à combustion interne — Spécifications —
Partie 1: Carburants diesel
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 45/SC 1
Rubber hoses and tubing for fuel
Secretariat: DIN
circuits for internal combustion
Voting begins on:
engines — Specification —
Part 1:
Voting terminates on:
Diesel fuels
Tuyaux de caoutchouc et flexibles pour les circuits de carburant
pour les moteurs à combustion interne — Spécifications —
Partie 1: Carburants diesel
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3  Terms and definitions . 2
4  Classification . 2
5 Sizes . 3
5.1 Tubing .3
5.2 Hoses .3
6 Performance requirements for hose and tubing . 4
6.1 General .4
6.2 Burst pressure .4
6.3 Adhesion .4
6.4 Low-temperature flexibility .4
6.5 Internal cleanliness .4
6.6 Extractable waxy materials .4
6.7 Tear resistance (applicable to tubing only) .4
6.8 Ozone resistance .5
6.9 Heat ageing resistance .5
6.10 Resistance to surface contamination by engine oil .5
6.11 Resistance to surface contamination by non-petroleum hydraulic (brake/clutch) fluid .5
6.12 Resistance to kinking .5
6.13 Resistance to suction .5
6.14 Resistance to fuels .6
6.15 Burn-through resistance .6
6.16 Electrical resistance .6
6.17 Life-cycle test (types 1, 2 and 3 only) .6
7 Frequency of testing . . 6
8 Marking . . 6
Annex A (normative) Cleanliness and extractables test . 8
Annex B (normative) Resistance of tubing to tearing . 10
Annex C (normative) Method for determining the resistance to surface contamination .13
Annex D (normative) Life-cycle test . 14
Annex E (informative) Example of tests of specific application for OEMs .15
Annex F (normative) Type approval tests .16
Annex G (normative) Routine tests . 17
Annex H (informative) Production acceptance tests .18

iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 45, Rubber and rubber products, Subcommittee
SC 1, Rubber and plastics hoses and hose assemblies.
This third edition cancels and replaces the second edition (ISO 19013-1:2019), which has been technically
revised.
The main changes are as follows:
— inclusion of requirements in Clauses 5 and 6;
— revision of Clause 7.
A list of all parts in the ISO 19013 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
FINAL DRAFT International Standard ISO/FDIS 19013-1:2026(en)
Rubber hoses and tubing for fuel circuits for internal
combustion engines — Specification —
Part 1:
Diesel fuels
WARNING — Persons using this document should be familiar with normal laboratory practice. This
document does not purport to address all of the safety problems, if any, associated with its use. It is
the responsibility of the user to establish appropriate safety and health practices.
1 Scope
This document specifies the requirements for rubber tubing and hoses used in diesel fuel circuits for internal
combustion engines. The diesel fuels covered include “bio-diesels” which consist of the methyl ester of rape
seed oil at levels up to 20 % by volume in conventional diesel fuels.
NOTE See Annex E for a detailed description of the “line call-out” used in tests for specific original equipment
manufacturer (OEM) applications.
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 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing
ISO 1629, Rubber and latices — Nomenclature
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 3302-1, Rubber — Tolerances for products — Part 1: Dimensional tolerances
ISO 4671, Rubber and plastics hoses and hose assemblies — Methods of measurement of the dimensions of hoses
and the lengths of hose assemblies
ISO 4926, Road vehicles — Hydraulic braking systems — Non-petroleum-based reference fluid
ISO 6133, Rubber and plastics — Analysis of multi-peak traces obtained in determinations of tear strength and
adhesion strength
ISO 7233:2021, Rubber and plastics hoses and hose assemblies — Determination of resistance to vacuum
ISO 7326:2016, Rubber and plastics hoses — Assessment of ozone resistance under static conditions
ISO 8031, Rubber and plastics hoses and hose assemblies — Determination of electrical resistance and
conductivity
ISO 8033, Rubber and plastics hoses — Determination of adhesion between components
ISO 10619-1:2017, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 1:
Bending tests at ambient temperature

ISO 10619-2:2021, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 2:
Bending tests at sub-ambient temperatures
ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test methods
SAE J2027, Standard for Protective Covers for Gasoline Fuel Line Tubing
SAE J2044: 2009, Quick Connect Coupling Specification for Liquid Fuel and Vapor/Emissions Systems
SAE J2260, Nonmetallic Fuel System Tubing with One or More Layers
EN 14214, Automotive fuels — Fatty acid methyl esters (FAME) for diesel engines — Requirements and test
methods
3  Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4  Classification
The product shall consist of extruded rubber materials with or without an integral reinforcement which can
or cannot be pre-formed before final vulcanization. The product can also have a rubber or thermoplastic
barrier layer, either as an internal layer or forming the inner liner, to impart improved fluid resistance or
reduced fuel vapour permeability, or both.
Seven hoses and tubings for specific applications are specified, as follows:
— Type 1:
— Class A = Pressurized [0,7 MPa (7 bar) working pressure] feed and return lines from the fuel tank to
the engine compartment (−40 °C to +80 °C continuous);
— Class B = Pressurized [0,2 MPa (2 bar) working pressure] feed and return lines from the fuel tank to
the engine compartment (−40 °C to +80 °C continuous);
— Type 2:
— Class A = Pressurized [0,7 MPa (7 bar) working pressure] feed and return lines in the engine
compartment (−40 °C to +100 °C continuous);
— Class B = Pressurized [0,2 MPa (2 bar) working pressure] feed and return lines in the engine
compartment (−40 °C to +100 °C continuous);
— Type 3:
— Class A = Pressurized [0,7 MPa (7 bar) working pressure] feed and return lines in the engine
compartment (−40 °C to +125 °C continuous);
— Class B = Pressurized [0,2 MPa (2 bar) working pressure] feed and return lines in the engine
compartment (−40 °C to +125 °C continuous);
— Type 4 Low pressure [0,12 MPa (1,2 bar) working pressure] fuel filler, vent and vapour handling
(−40 °C to +80 °C continuous).

5 Sizes
5.1 Tubing
The test shall be carried out in accordance with ISO 4671. The inside diameters and wall thicknesses shall be
as specified in Table 1.
Tolerances shall be selected from the appropriate categories specified in ISO 3302-1: M3 for moulded hoses:
E2 for extrusions.
The thickness of the barrier layer, where applicable, shall be included in the total nominal wall thickness
shown in Table 1.
Table 1 — Tubing inside diameters and wall thicknesses
Inside diameter Wall thickness
mm mm
3,5 3,5
4 3,5
5 4
7 4,5
9 4,5
11 4,5
13 4,5
NOTE For information, the unions on which the tubing is fitted have the following diameters: 4 mm, 4,5 mm,
6 mm or 6,35 mm, 8 mm, 10 mm, 12 mm and 14 mm.
5.2 Hoses
The test shall be carried out in accordance with ISO 4671. The dimensions and concentricity of hoses shall
be in accordance with Tables 2 and 3.
Table 2 — Hose dimensions
Dimensions in millimetres
Inside diameter Tolerance Outside diameter Tolerance
3,5 ±0,3 9,5 ±0,4
4 ±0,3 10 ±0,4
5 ±0,3 11 ±0,4
6 ±0,3 12 ±0,4
7 ±0,3 13 ±0,4
7,5 ±0,3 13,5 ±0,4
8 ±0,3 14 ±0,4
9 ±0,3 15 ±0,4
11 ±0,3 18 ±0,4
12 ±0,3 19 ±0,4
13 ±0,4 20 ±0,6
16 ±0,4 24 ±0,6
21 ±0,4 29 ±0,6
05,
31,5 40 ±1
1
05,
40 50 ±1
1
Table 3 — Hose concentricity
Maximum variation from
Inside diameter
concentricity
mm mm
Up to and including 3,5 0,4
Over 3,5 0,8
6 Performance requirements for hose and tubing
6.1 General
Tests shall be selected from the following list (reference: Table E.1) for each application of hose or tubing,
based on the performance requirements for the finished product. Type approval tests (as defined in Clause 7)
for each hose or tubing group given in Annex F shall be used.
6.2 Burst pressure
The test shall be carried out in accordance with ISO 1402. The minimum burst pressure for Types 1, 2 and 3,
Class A, shall be 3,
...

ISO/TC 45/SC 1
Secretariat: DIN
Third edition
Date: 2026-02-1604-10
Rubber hoses and tubing for fuel circuits for internal combustion
engines — Specification —
—
Part 1:
Diesel fuels
Tuyaux de caoutchouc et flexibles pour les circuits de carburant pour les moteurs à combustion interne —
Spécifications —
Partie 1: Carburants diesel —
Partie 1: Carburants diesel
FDIS stage
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO'sISO’s member body in the country of the requester.
ISO Copyright Officecopyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland.
ii
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification. 2
5 Sizes . 3
5.1 Tubing . 3
5.2 Hoses . 3
6 Performance requirements for hose and tubing . 4
6.1 General. 4
6.2 Burst pressure . 4
6.3 Adhesion . 4
6.4 Low-temperature flexibility . 5
6.5 Internal cleanliness . 5
6.6 Extractable waxy materials . 5
6.7 Tear resistance (applicable to tubing only) . 5
6.8 Ozone resistance . 5
6.9 Heat ageing resistance . 5
6.10 Resistance to surface contamination by engine oil . 6
6.11 Resistance to surface contamination by non-petroleum hydraulic (brake/clutch) fluid . 6
6.12 Resistance to kinking . 6
6.13 Resistance to suction . 6
6.14 Resistance to fuels . 6
6.15 Burn-through resistance . 6
6.16 Electrical resistance . 6
6.17 Life-cycle test (types 1, 2 and 3 only). 6
7 Frequency of testing . 7
8 Marking . 7
Annex A (normative) Cleanliness and extractables test . 8
Annex B (normative) Resistance of tubing to tearing . 10
Annex C (normative) Method for determining the resistance to surface contamination . 15
Annex D (normative) Life-cycle test . 16
Annex E (informative) Example of tests of specific application for OEMs . 17
Annex F (normative) Type approval tests . 19
Annex G (normative) Routine tests . 20
Annex H (informative) Production acceptance tests . 21

iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 45, Rubber and rubber products, Subcommittee
SC 1, Rubber and plastics hoses and hose assemblies.
This third edition cancels and replaces the second edition (ISO 19013-1:2019), of which it constitutes a minor
revisionhas been technically revised.
The main changes compared to the previous edition are as follows:
— — inclusion of requirements in Clause Clauses 5 and 6;
— — revision of Clause 7.
A list of all parts in the ISO 19013 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
Rubber hoses and tubing for fuel circuits for internal combustion
engines — Specification —Part 1: Diesel fuels —
Part 1:
Diesel fuels
WARNING — Persons using this document should be familiar with normal laboratory practice. This
document does not purport to address all of the safety problems, if any, associated with its use. It is
the responsibility of the user to establish appropriate safety and health practices.
1 Scope
This document specifies the requirements for rubber tubing and hoses used in diesel fuel circuits for internal
combustion engines. The diesel fuels covered include “bio-diesels” which consist of the methyl ester of rape
seed oil at levels up to 20 % by volume in conventional diesel fuels.
NOTE See Annex EAnnex E for a detailed description of the “line call-out” used in tests for specific original equipment
manufacturer (OEM) applications.
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 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing
ISO 1629, Rubber and latices — Nomenclature
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 3302--1, Rubber — Tolerances for products — Part 1: Dimensional tolerances
ISO 4671, Rubber and plastics hoses and hose assemblies — Methods of measurement of the dimensions of hoses
and the lengths of hose assemblies
ISO 4926, Road vehicles — Hydraulic braking systems — Non-petroleum-based reference fluid
ISO 6133, Rubber and plastics — Analysis of multi-peak traces obtained in determinations of tear strength and
adhesion strength
ISO 7233:20162021, Rubber and plastics hoses and hose assemblies — Determination of resistance to vacuum
ISO 7326:2016, Rubber and plastics hoses — Assessment of ozone resistance under static conditions
ISO 8031, Rubber and plastics hoses and hose assemblies — Determination of electrical resistance and
conductivity
ISO 8033, Rubber and plastics hoses — Determination of adhesion between components
ISO 10619--1:2017, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 1:
Bending tests at ambient temperature
ISO 10619--2:2021, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 2:
Bending tests at sub-ambient temperatures
ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test methods
SAE J2027, Standard for Protective Covers for Gasoline Fuel Line Tubing
SAE J2044:2009, Quick Connect Coupling Specification for Liquid Fuel and Vapor/Emissions Systems
SAE J2260, Nonmetallic Fuel System Tubing with One or More Layers
EN 14214, Automotive fuels — Fatty acid methyl esters (FAME) for diesel engines — Requirements and test
methods
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— — ISO Online browsing platform: available at https://www.iso.org/obp
— — IEC Electropedia: available at https://www.electropedia.org/
4 Classification
The product shall consist of extruded rubber materials with or without an integral reinforcement which can
or cannot be pre-formed before final vulcanization. The product can also have a rubber or thermoplastic
barrier layer, either as an internal layer or forming the inner liner, to impart improved fluid resistance or
reduced fuel vapour permeability, or both.
Seven hoses and tubings for specific applications are specified, as follows:
— — Type 1:
— — Class A = Pressurized [0,7 MPa (7 bar) working pressure] feed and return lines from the fuel
tank to the engine compartment (−40 °C to +80 °C continuous);
— — Class B = Pressurized [0,2 MPa (2 bar) working pressure] feed and return lines from the fuel
tank to the engine compartment (−40 °C to +80 °C continuous);
— — Type 2:
— — Class A = Pressurized [0,7 MPa (7 bar) working pressure] feed and return lines in the engine
compartment (−40 °C to +100 °C continuous);
— — Class B = Pressurized [0,2 MPa (2 bar) working pressure] feed and return lines in the engine
compartment (−40 °C to +100 °C continuous);
— — Type 3:
— — Class A = Pressurized [0,7 MPa (7 bar) working pressure] feed and return lines in the engine
compartment (−40 °C to +125 °C continuous);
— — Class B = Pressurized [0,2 MPa (2 bar) working pressure] feed and return lines in the engine
compartment (−40 °C to +125 °C continuous);
— — Type 4 Low pressure [0,12 MPa (1,2 bar) working pressure] fuel filler, vent and vapour handling
(−40 °C to +80 °C continuous).
5 Sizes
5.1 Tubing
The test shall be carried out in accordance with ISO 4671. The inside diameters and wall thicknesses shall be
as specified in Table 1Table 1.
Tolerances shall be selected from the appropriate categories specified in ISO 3302-1: M3 for moulded hoses:
E2 for extrusions.
The thickness of the barrier layer, where applicable, shall be included in the total nominal wall thickness
shown in Table 1Table 1.
Table 1— Tubing inside diameters and wall thicknesses
Inside diameter Wall thickness
mm mm
3,5 3,5
4 3,5
5 4
7 4,5
9 4,5
11 4,5
13 4,5
NOTE For information, the unions on which the tubing is fitted have the following diameters: 4 mm, 4,5 mm, 6 mm
or 6,35 mm, 8 mm, 10 mm, 12 mm and 14 mm.
5.2 Hoses
The test shall be carried out in accordance with ISO 4671. The dimensions and concentricity of hoses shall be
in accordance with Tables 2Tables 2 and 33.
Table 2— Hose dimensions
Dimensions in millimetres
Inside diameter Tolerance Outside diameter Tolerance
3,5 ±0,3 9,5 ±0,4
4 ±0,3 10 ±0,4
5 ±0,3 11 ±0,4
6 ±0,3 12 ±0,4
Inside diameter Tolerance Outside diameter Tolerance
7 ±0,3 13 ±0,4
7,5 ±0,3 13,5 ±0,4
8 ±0,3 14 ±0,4
9 ±0,3 15 ±0,4
11 ±0,3 18 ±0,4
12 ±0,3 19 ±0,4
13 ±0,4 20 ±0,6
16 ±0,4 24 ±0,6
21 ±0,4 29 ±0,6
+0,5
31,5  40 ±1
−1
+0,5
40  50 ±1
−1
Table 3— Hose concentricity
Maximum variation from
Inside diameter
concentricity
mm mm
Up to and including 3,5 0,4
Over 3,5 0,8
6 Performance requirements for hose and tubing
6.1 Test items
6.1 General
Tests shall be selected from the following list (reference: Table E.1Table E.1)) for each application of hose or
tubing, based on the performance requirements for the finished product. Type approval tests (as defined in
Clause 7Clause 7)) for each hose or tubing group given in Annex FAnnex F shall be used.
6.16.2 6.1.1 Burst pressure
The test shall be carried out in accordance with ISO 1402. The minimum burst pressure for Types 1, 2 and 3,
Class A, shall be 3,0 MPa (30 bar) gauge and for Class B shall be 1,2 MPa (12 bar) gauge. Type 4 shall be
0,5 MPa (5 bar) gauge. Additionally, after fuel resistance testing [test m)], hoses and tubing shall not have a
burst pressure of less than 75 % of the original burst pressure.
6.3 6.1.2 Adhesion (
This applies for all constructions with two or more bonded layers only).
The test shall be carried out in accordance with the appropriate procedure in ISO 8033. The adhesion between
each pair of bonded layers shall not be less than 1,5 kN/m.
6.26.4 6.1.3 Low-temperature flexibility
The test shall be carried out in accordance with ISO 10619-2:2021, Method B. A length of hose or tubing which
has been previously kept filled with ISO 1817 liquid C for 72 h ± 2 h at 21 °C ± 2 °C and then kept cooled at
−40 °C ± 2 °C for 72 h ± 2 h shall not exhibit any cracking when examined under × 2 magnification after
bending around a similarly cooled mandrel the radius of which is 12 times the inside diameter of the hose or
25 times the inside diameter of the tubing. The hose or tubing shall then conform to the burst strength
requirement of test a).
6.36.5 6.1.4 Internal cleanliness
The test shall be carried out in accordance with Annex AAnnex A. The insoluble impurities shall not exceed
2 2
5 g/m and the fuel-soluble impurities shall not exceed 3 g/m .
6.46.6 6.1.5 Extractable waxy materials
The test shall be carried out in accordance with Annex AAnnex A. The extractable waxy materials shall not
exceed 2,5 g/m .
6.56.7 6.1.6 Tear resistance (applicable to tubing only)
The test shall be carried out in accordance with Annex BAnnex B. The minimum tear resistance shall be
4,5 kN/m.
6.66.8 6.1.7 Ozone resistance
The test shall be carried out in accordance with method 1 of ISO 7326:2016, method 1 under the following
conditions. The hose or tubing shall not sh
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