Thermoplastic tubing and hoses for automotive use

ISO 13775-2:2016 specifies test requirements and test methods for extruded thermoplastic tubing and hoses for use in petroleum-based-fuel lines in vehicles powered by internal-combustion engines.

Tubes et tuyaux en thermoplastique pour l'industrie automobile

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Published
Publication Date
11-Dec-2016
Current Stage
9060 - Close of review
Start Date
05-Jun-2021
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INTERNATIONAL ISO
STANDARD 13775-2
Second edition
2016-12-15
Thermoplastic tubing and hoses for
automotive use —
Part 2:
Petroleum-based-fuel applications
Tubes et tuyaux en thermoplastique pour l’industrie automobile —
Partie 2: Applications pour carburants à base de pétrole
Reference number
ISO 13775-2:2016(E)
ISO 2016
---------------------- Page: 1 ----------------------
ISO 13775-2:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland

All rights reserved. Unless otherwise specified, 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’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 13775-2:2016(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Classification and materials ..................................................................................................................................................................... 1

4 Dimensions ................................................................................................................................................................................................................. 2

5 Requirements .......................................................................................................................................................................................................... 2

6 Frequency of testing .......................................................................................................................................................................................... 4

7 Marking .......................................................................................................................................................................................................................... 4

Annex A (informative) Example of how a non-standard type of tubing or hose could be

specified using a matrix ................................................................................................................................................................................ 6

Annex B (normative) Method for determining the resistance to surface-contaminating fluids ............7

Annex C (normative) Method of test for flame resistance .............................................................................................................. 8

Annex D (normative) Cleanliness and extractables test ...............................................................................................................14

Annex E (normative) Type tests .............................................................................................................................................................................16

Annex F (normative) Routine tests......................................................................................................................................................................17

Annex G (informative) Production tests.........................................................................................................................................................18

Bibliography .............................................................................................................................................................................................................................19

© ISO 2016 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 13775-2:2016(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 World Trade Organization (WTO) principles in the

Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.

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 13775-2:2000), which has been

technically revised.

ISO 13775 consists of the following parts, under the general title Thermoplastic tubing and hoses for

automotive use:
— Part 1: Non-fuel applications
— Part 2: Petroleum-based-fuel applications
iv © ISO 2016 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 13775-2:2016(E)
Introduction

This part of ISO 13775 defines the requirements of extruded thermoplastic tubing/hoses for petroleum-

based-fuel applications for automotive use. In addition, it 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 six main types (see example in Annex A). In this case,

the tubing or hose would not carry any marking showing this ISO specification number, but could detail

the OEM’s own identification markings as shown on their part drawings.
© ISO 2016 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 13775-2:2016(E)
Thermoplastic tubing and hoses for automotive use —
Part 2:
Petroleum-based-fuel applications

WARNING — Persons using this part of ISO 13775 should be familiar with normal laboratory

practice. This part of ISO 13775 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 and to ensure compliance with any national regulatory conditions.

1 Scope

This part of ISO 13775 specifies test requirements and test methods for extruded thermoplastic tubing

and hoses for use in petroleum-based-fuel lines in vehicles powered by internal-combustion engines.

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 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests

ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing

ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids

ISO 4926, Road vehicles — Hydraulic braking systems — Non-petroleum-base reference fluids

ISO 7628, Road vehicles — Thermoplastics tubing for air braking systems

ISO 8031:2009, 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 8308, Rubber and plastics hoses and tubing — Determination of transmission of liquids through hose

and tubing walls

ISO 10619-1, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 1:

Bending tests at ambient temperature

ISO 19013-2:2016, Rubber hoses and tubing for fuel circuits for internal combustion engines —

Specification — Part 2: Gasoline fuels

ISO 30013, Rubber and plastics hoses — Methods of exposure to laboratory light sources — Determination

of changes in colour, appearance and other physical properties
SAE J2260, Non-metallic Fuel System Tubing with One or More Layers
3 Classification and materials

The product shall consist of an extruded thermoplastic material with or without an integral

reinforcement. The product may also have an inner veneer to impart improved fluid resistance and/or

© ISO 2016 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO 13775-2:2016(E)

reduced fuel vapour permeability. It may also have an extruded outer cover to improve environmental

resistance and/or flame resistance. The outer cover is not necessarily bonded to the tubing or hose.

Six types of tubing and hose for specific applications are specified as follows:

— Type 1: feed and return lines from the fuel tank to the engine compartment — gasoline engines;

— Type 2: feed and return lines from the fuel tank to the engine compartment — diesel engines;

— Type 3: feed and return lines in the engine compartment — moderate-temperature (100 °C)

environment —gasoline engines;

— Type 4: feed and return lines in the engine compartment — high-temperature (125 °C) environment

— gasoline engines;
— Type 5: feed lines in the engine compartment — diesel engines;
— Type 6: multi-layer tubing or hoses for vapour lines.
4 Dimensions
Diameters and wall thicknesses shall be as given in Table 1.

The wall thickness shall be the sum of the individual thicknesses of the various elements in the

construction of the tubing or hose. The thickness of each individual element shall be such that it is able

to carry out its own function and the total function of the tubing or hose.
Table 1 — Nominal sizes, internal diameters and wall thicknesses
Nominal size Internal diameter Wall thickness (min)
mm mm
2 2 ± 0,1 0,9
4 4 ± 0,1 0,9
6 6 ± 0,1 0,9
6 6 ± 0,1 1,35
7,5 7,5 ± 0,1 1,12
8 8 ± 0,1 0,9
8 8 ± 0,1 1,35
9 9 ± 0,1 1,35
10 10 ± 0,1 1,8
12 12 ± 0,1 1,35
12 12 ± 0,1 1,8
14 14 ± 0,1 1,8
5 Requirements

The following tests shall be selected for each application of the tubing or hose, based on the performance

requirements of the finished product. The tests to be carried out for each type of tubing or hose

classified in Clause 3 are given in Table E.1.

a) Burst pressure: When determined in accordance with ISO 1402, the minimum burst pressure for

all constructions shall be 5,5 MPa gauge (55 bar).

b) Cold impact resistance: After cold impact testing at −40 °C in accordance with ISO 7628, all

constructions shall show no evidence of external fracture or cracking and shall meet the burst

pressure requirements of a).
2 © ISO 2016 – All rights reserved
---------------------- Page: 7 ----------------------
ISO 13775-2:2016(E)

c) Heat ageing resistance: After ageing at one or more of the following sets of conditions in accordance

with ISO 188, all constructions shall meet the cold impact requirements of b):
1) 1 000 h at 70 °C;
2) 1 000 h at 100 °C;
3) 1 000 h at 125 °C;
4) 168 h at 100 °C;
5) 168 h at 125 °C;
6) 168 h at 140 °C.

d) Resistance to light: All constructions shall meet the cold impact requirements of b) after 1 000 kJ/m

xenon-arc exposure in accordance with ISO 30013.

NOTE This test is for applications that require exposure to daylight either during normal vehicle usage

or on chassis that can be stored in the open prior to final assembly of the vehicle.

e) Resistance to fuels: When tested in accordance with SAE J2260, for 1 000 h at 60 °C ± 2 °C, using

one or more of the following test fuels, all constructions shall meet the cold impact requirements of

b) and the adhesion requirements of k) where applicable:

1) a mixture of 85 % by volume of liquid C (ISO 1817) and 15 % by volume of methanol;

2) a mixture of 75 % by volume of liquid C (ISO 1817) and 25 % by volume of methanol;

3) a mixture of 50 % by volume of liquid C (ISO 1817) and 50 % by volume of methanol;

4) a mixture of 15 % by volume of liquid C (ISO 1817) and 85 % by volume of methanol;

5) by volume 100 % liquid 2 (ISO 1817);

6) a mixture of 90 % by volume of liquid 2 (ISO 1817) and 10 % by volume of ethanol;

7) liquid F (ISO 1817) (simulated diesel fuel);

8) a mixture of 90 % by volume of liquid F (ISO 1817) and 10 % by volume of rape seed methyl ester;

9) a mixture of 80 % by volume of liquid F (ISO 1817) and 20 % by volume of rape seed methyl ester;

10) PN 180 oxidized fuel in accordance with ISO 19013-2:2016, Annex D.

f) Volume change in the test fluids: Determine the change in volume of the hose (tube and cover)

by the procedure described in ISO 1817. Place the test pieces in test liquids as specified in e) at

a temperature
...

DRAFT INTERNATIONAL STANDARD
ISO/DIS 13775-2
ISO/TC 45/SC 1 Secretariat: DSM
Voting begins on: Voting terminates on:
2015-05-26 2015-08-26
Thermoplastic tubing and hoses for automotive use —
Part 2:
Petroleum-based-fuel applications
Tubes et tuyaux en thermoplastique pour l’industrie automobile —
Partie 2: Applications pour carburants à base de pétrole
ICS: 83.140.40; 83.140.30; 43.060.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 13775-2:2015(E)
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 SUPPORTING DOCUMENTATION. ISO 2015
---------------------- Page: 1 ----------------------
ISO/DIS 13775-2:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015

All rights reserved. Unless otherwise specified, 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’s member body in the country of

the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2015 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 13775-2:2015(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Classification and materials ..................................................................................................................................................................... 2

4 Dimensions ................................................................................................................................................................................................................. 2

5 Requirements .......................................................................................................................................................................................................... 3

6 Frequency of testing .......................................................................................................................................................................................... 4

7 Marking .......................................................................................................................................................................................................................... 5

Annex A (informative) Example of how a non-standard type of tubing or hose could be

specified using a matrix ................................................................................................................................................................................ 6

Annex B (normative) Method for determining the resistance to surface-contaminating fluids ............7

Annex C (normative) Method of test for flame resistance .............................................................................................................. 8

Annex D (normative) Cleanliness and extractables test ...............................................................................................................14

Annex E (normative) Type tests .............................................................................................................................................................................16

Annex F (normative) Routine tests......................................................................................................................................................................18

Annex G (informative) Production tests.........................................................................................................................................................19

© ISO 2015 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/DIS 13775-2:2015(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. 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. 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, Hoses (rubber and plastics).

This second edition cancels and replaces the first edition (ISO 13775-2:2000), of which has been

technically revised.

ISO 13775 consists of the following parts, under the general title Thermoplastic tubing and hoses for

automotive use:
— Part 1: Non-fuel applications;
— Part 2: Petroleum-based-fuel applications.
iv © ISO 2015 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/DIS 13775-2:2015(E)
Introduction

This specification defines the requirements of extruded thermoplastic tubing/hoses for petroleum-

based-fuel applications for automotive use. In addition, it may 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 six main types (see example in Annex A). In this case,

the tubing or hose would not carry any marking showing this ISO specification number, but may detail

the OEM’s own identification markings as shown on their part drawings.
© ISO 2015 – All rights reserved v
---------------------- Page: 5 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 13775-2:2015(E)
Thermoplastic tubing and hoses for automotive use —
Part 2:
Petroleum-based-fuel applications

WARNING — Persons using this part of — ISO 13775 should be familiar with normal laboratory

practice. This part of ISO 13775 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 and to ensure compliance with any national regulatory conditions.

1 Scope

This part of ISO 13775 specifies test requirements and test methods for extruded thermoplastic tubing

and hoses for use in petroleum-based-fuel lines in vehicles powered by internal-combustion engines.

This specification is intended especially for use by original equipment manufacturers (OEMs).

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 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests

ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing

ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids

ISO 4925, Road vehicles — Specification of non-petroleum-base brake fluids for hydraulic systems

ISO 4926, Road vehicles — Hydraulic braking systems — Non-petroleum-base reference fluids

ISO 7628, Road vehicles — Thermoplastics tubing for air braking systems

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 8308, Rubber and plastics hoses and tubing — Determination of transmission of liquids through hose

and tubing walls

ISO 10619-1, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 1:

Bending tests at ambient temperature

ISO 19013-2:2005, Rubber hoses and tubing for fuel circuits for internal combustion engines —

Specification — Part 2: Gasoline fuels

ISO 30013, Rubber and plastics hoses — Methods of exposure to laboratory light sources — Determination

of changes in colour, appearance and other physical properties
SAE J2260, Nonmetallic Fuel System Tubing with One or More Layers
© ISO 2015 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO/DIS 13775-2:2015(E)
3 Classification and materials

The product shall consist of an extruded thermoplastic material with or without an integral

reinforcement. The product may also have an inner veneer to impart improved fluid resistance and/or

reduced fuel vapour permeability. It may also have an extruded outer cover to improve environmental

resistance and/or flame resistance. The outer cover is not necessarily bonded to the tubing or hose.

Six types of tubing and hose for specific applications are specified as follows:

Type 1: feed and return lines from the fuel tank to the engine compartment — gasoline engines;

Type 2: feed and return lines from the fuel tank to the engine compartment — diesel engines;

Type 3: feed and return lines in the engine compartment — moderate-temperature (100 °C)

environment —gasoline engines;

Type 4: feed and return lines in the engine compartment — high-temperature (125 °C) environment —

gasoline engines;
Type 5: feed lines in the engine compartment — diesel engines;
Type 6: multi-layer tubing or hoses for vapour lines.
4 Dimensions
Diameters and wall thicknesses shall be as given in Table 1.

The wall thickness shall be the sum of the individual thicknesses of the various elements in the

construction of the tubing or hose. The thickness of each individual element shall be such that it is able

to carry out its own function and the total function of the tubing or hose.
Table 1 — Nominal sizes, internal diameters and wall thicknesses
Nominal size Internal diameter Wall thickness (min.)
mm mm
2 2 ± 0,1 0,9
4 4 ± 0,1 0,9
6 6 ± 0,1 0,9
6 6 ± 0,1 1,35
7,5 7,5 ± 0,1 1,12
8 8 ± 0,1 0,9
8 8 ± 0,1 1,35
9 9 ± 0,1 1,35
10 10 ± 0,1 1,8
12 12 ± 0,1 1,35
12 12 ± 0,1 1,8
14 14 ± 0,1 1,8
2 © ISO 2015 – All rights reserved
---------------------- Page: 7 ----------------------
ISO/DIS 13775-2:2015(E)
5 Requirements

The following tests shall be selected for each application of the tubing or hose, based on the performance

requirements of the finished product. The tests to be carried out for each type of tubing or hose classified

in Clause 3 are given in Table 2.

a) Burst pressure: When determined in accordance with ISO 1402, the minimum burst pressure for all

constructions shall be 5,5 MPa gauge (55 bar).

b) Cold impact resistance: After cold impact testing at − 40 °C in accordance with ISO 7628, all

constructions shall show no evidence of external fracture or cracking and shall meet the burst

pressure requirements of a).

c) Heat ageing resistance: After ageing at one or more of the following sets of conditions in accordance

with ISO 188, all constructions shall meet the cold impact requirements of b):
1) 1 000 h at 70 °C
2) 1 000 h at 100 °C
3) 1 000 h at 125 °C
4) 168 h at 100 °C
5) 168 h at 125 °C
6) 168 h at 140 °C

d) Resistance to light: All constructions shall meet the cold impact requirements of b) after

1 000 kJ/mNumber-1 2 xenon-arc exposure in accordance with ISO 30013.

NOTE This test is for applications that require exposure to daylight either during normal vehicle usage

or on chassis that may be stored in the open prior to final assembly of the vehicle.

e) Resistance to fuels: When tested in accordance with SAE J2260, for 1 000 h at 60 °C ± 2 °C, using one

or more of the following test fuels, all constructions shall meet the cold impact requirements of b)

and the adhesion requirements of k) where applicable:

1) A mixture of 85 % by volume of liquid C (ISO 1817) and 15 % by volume of methanol.

2) A mixture of 75 % by volume of liquid C (ISO 1817) and 25 % by volume of methanol.

3) A mixture of 50 % by volume of liquid C (ISO 1817) and 50 % by volume of methanol.

4) A mixture of 15 % by volume of liquid C (ISO 1817) and 85 % by volume of methanol.

5) By volume 100 % liquid 2 (ISO 1817)

6) A mixture of 90 % by volume of liquid 2 (ISO 1817) and 10 % by volume of Ethanol.

7) Liquid F (ISO 1817) (simulated diesel fuel).

8) A mixture of 90 % by volume of liquid F (ISO 1817) and 10 % by volume of rape seed methyl ester.

9) A mixture of 80 % by volume of liquid F
...

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