ISO 13775-2:2016

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
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THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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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
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©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015

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ISO/DIS 13775-2:2015(E)

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© ISO 2015
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ii © ISO 2015 – All rights reserved

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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

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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.
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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.
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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
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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
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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
...