Thermoplastic multi-layer (non-vulcanized) hoses and hose assemblies for the transfer of hydrocarbons, solvents and chemicals — Specification

ISO 27126:2014 specifies requirements for four types of thermoplastic multi-layer (non-vulcanized) hoses and hose assemblies for carrying hydrocarbons, solvents and chemicals. It specifies bore sizes from 25 mm to 300 mm, working pressures from 0,4 MPa (4 bar) to 1,4 MPa (14 bar) and working temperatures from -30 °C to 150 °C, according to type. Type 1 hoses are suitable for vapour applications. Types 2 to 4 hoses are suitable for liquid applications.

Tuyaux et flexibles multicouches (non vulcanisés) thermoplastiques pour le transfert des hydrocarbures, des solvants et des produits chimiques — Spécifications

General Information

Status
Withdrawn
Publication Date
14-Sep-2014
Withdrawal Date
14-Sep-2014
Current Stage
9599 - Withdrawal of International Standard
Start Date
03-Nov-2021
Completion Date
03-Nov-2021
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INTERNATIONAL ISO
STANDARD 27126
First edition
2014-09-15
Thermoplastic multi-layer (non-
vulcanized) hoses and hose
assemblies for the transfer of
hydrocarbons, solvents and
chemicals — Specification
Tuyaux et flexibles multicouches (non vulcanisés) thermoplastiques
pour le transfert des hydrocarbures, des solvants et des produits
chimiques — Spécifications
Reference number
ISO 27126:2014(E)
ISO 2014
---------------------- Page: 1 ----------------------
ISO 27126:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014

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
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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 2014 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 27126:2014(E)
Contents Page

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

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

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

3  Terms and definitions ..................................................................................................................................................................................... 2

4  Classification ............................................................................................................................................................................................................ 2

5 Materials and construction ....................................................................................................................................................................... 2

5.1 General ........................................................................................................................................................................................................... 2

5.2 Internal and external wire ............................................................................................................................................................ 3

6 Dimensions ................................................................................................................................................................................................................. 3

6.1 Inside diameters, with tolerances and minimum bend radii .......................................................................... 3

6.2 Tolerance on length ............................................................................................................................................................................. 4

7 Performance requirements of hoses and hose assemblies ...................................................................................... 4

7.1 Cover ................................................................................................................................................................................................................ 4

7.2 Hoses ............................................................................................................................................................................................................... 4

7.3 End fittings ................................................................................................................................................................................................. 5

7.4 Hose assemblies ..................................................................................................................................................................................... 5

7.5 Electrical continuity ........................................................................................................................................................................... 6

8 Test frequency ......................................................................................................................................................................................................... 6

9 Type tests ..................................................................................................................................................................................................................... 6

10 Marking .......................................................................................................................................................................................................................... 7

10.1 Hose marking ........................................................................................................................................................................................... 7

10.2 Hose assembly marking .................................................................................................................................................................. 7

Annex A (informative) Resistance to chemical(s) conveyed ........................................................................................................ 8

Annex B (normative) Carbon steel wire ............................................................................................................................................................ 9

Annex C (normative) Galvanized zinc coating .........................................................................................................................................11

Annex D (normative) Method of test for crush recovery ..............................................................................................................12

Annex E (normative) Method of test for fuel resistance ................................................................................................................14

Annex F (normative) Method of test for thermal ageing ..............................................................................................................15

Annex G (normative) Method of test flammability .............................................................................................................................16

Annex H (normative) Sequence of hydrostatic tests .........................................................................................................................18

Annex I (normative) Method of test for fitting security.................................................................................................................19

Annex J (normative) Method of test for leak tightness ...................................................................................................................20

Annex K (normative) Type and routine tests for hoses and hose assemblies ........................................................21

Annex L (informative) Batch tests for hoses and hose assemblies.....................................................................................22

Bibliography .............................................................................................................................................................................................................................23

© ISO 2014 – All rights reserved iii
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ISO 27126:2014(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.

ISO 27126 is based on EN 13765:2010 with the following modifications to comply with the requirements

of ISO/TC 45/SC 1:
— the pressure unit “bar” has been replaced by “MPa (bar)”;

— all references to EN or EN/ISO standards have been replaced by references to ISO standards

wherever possible;
— references in Clause 2 have been amended;

— Table 2 has been amended (tolerance for ID 150 only, the other tolerances are already sufficient to

accommodate the required changes of ID to include inch size mandrels);

— Table 3 now requires the change in length and twist to be measured at maximum working pressure

instead of proof pressure and Annex H has been amended accordingly;

— in Table 4, the reference to the test method clause, to determine electrical resistance between

fittings according to ISO 8031 has been corrected;

— Annex G has been amended in order to describe the method of detection of failure after completion

of test;
— in Clause 10, the marking has been amended according ISO/TC45/SC1 remarks.
iv © ISO 2014 – All rights reserved
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INTERNATIONAL STANDARD ISO 27126:2014(E)
Thermoplastic multi-layer (non-vulcanized) hoses and
hose assemblies for the transfer of hydrocarbons, solvents
and chemicals — Specification

WARNING — Persons using this document should be familiar with normal laboratory practice.

This document does not purport to address all the safety problems, if any, associated with its

use. It is the responsibility of the user to establish appropriate health and safety practices and to

ensure compliance with any national regulatory conditions.
1 Scope

This International Standard specifies requirements for four types of thermoplastic multi-layer (non-

vulcanized) hoses and hose assemblies for carrying hydrocarbons, solvents and chemicals. It specifies

bore sizes from 25 mm to 300 mm, working pressures from 0,4 MPa (4 bar) to 1,4 MPa (14 bar) and

working temperatures from –30 °C to 150 °C, according to type.

Type 1 hoses are suitable for vapour applications. Types 2 to 4 hoses are suitable for liquid applications.

NOTE 1 See Annex A concerning the selection of the material for the inner wall of layers and any polymeric

coating of the internal wire helix related to the chemical(s) to be conveyed by the hoses and/or hose assemblies.

NOTE 2 It is intended that the manufacturer be consulted where a polymeric coated internal wire is being

considered for use with low conductivity hydrocarbons or chemicals.
This International Standard does not apply to hoses and hose assemblies for:
— aircraft refuelling see (ISO 1825);
— fuel dispensing see (ISO 5772);
— oil burners see (ISO 6806);
— liquefied petroleum gas and liquefied natural gas see (ISO 27127);
— fire fighting see (ISO 14557);
— offshore liquefied natural gas see (EN 1474–2);
— refrigeration circuits.
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 209, Aluminium and aluminium alloys — Chemical composition

ISO 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special

characteristics

ISO 1402:2009, Rubber and plastics hoses and hose assemblies — Hydrostatic testing

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

© ISO 2014 – All rights reserved 1
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ISO 27126:2014(E)
ISO 2411, Rubber- or plastics-coated fabrics — Determination of coating adhesion

ISO 4671, Rubber and plastics hoses and hose assemblies — Methods of measurement of the dimensions of

hoses and the lengths of hose assemblies

ISO 7233:2006, Rubber and plastics hoses and hose assemblies — Determination of resistance to vacuum

ISO 7326:2006, Rubber and plastics hoses — Assessment of ozone resistance under static conditions

ISO 8031:2009, Rubber and plastics hoses and hose assemblies — Determination of electrical resistance and

conductivity
ISO 8330, Rubber and plastics hoses and hose assemblies — Vocabulary

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

Bending tests at ambient temperature

ISO 10619-2, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 2:

Bending tests at sub-ambient temperatures
ISO 16143-3:2005, Stainless steels for general purposes — Part 3: Wire
EN 590, Automotive fuels — Diesel — Requirements and test methods

EN 10088-3:2005, Stainless steels — Part 3: Technical delivery conditions for semi-finished products, bars,

rods, wire, sections and bright products of corrosion resisting steels for general purposes

3  Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 8330 apply.

4  Classification

Hoses shall be classified according to working pressure and working temperature range as given in

Table 1.
Table 1 — Pressure and temperature range
Type 1 Type 2 Type 3 Type 4
MPa Bar MPa Bar MPa Bar MPa Bar
Maximum working pressure 0,4 4 1,0 10 1,4 14 1,4 14
Proof pressure 0,6 6 1,5 15 2,1 21 2,1 21
Minimum burst pressure 1,6 16 4 40 5,6 56 5,6 56
Vacuum rating 0,05 0,5 0,09 0,9 0,09 0,9 0,09 0,9
Working temperature range (°C) −20 to +60 −30 to +80 −30 to + 80 −30 to +150
NOTE 1 bar = 0,1 MPa.
5 Materials and construction
5.1 General

Hoses shall be constructed as shown in Figure 1 and shall consist of the following:

— an internal wire helix (see 5.2);
2 © ISO 2014 – All rights reserved
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ISO 27126:2014(E)

— a multi-ply wall of layers of films and fabrics made of thermoplastics that in combination give the

required properties and provide a complete seal (see also Annex A);
— a cover consisting of a fabric with abrasion resistant polymeric coating;
— an external wire helix (see 5.2).
5.2 Internal and external wire

Wire shall be chosen in accordance with its chemical resistance from one of the following materials:

— austenitic stainless steel wire conforming to EN 10088-3, Table 4, numbers 1.4436 (X3CrNiMo 17-

13-3) or ISO 16143-3:2005, Table 1: X2CrNi 19-11, X5CrNiMo 17-12-2, X2CrNiMo 17-12-2;

— carbon steel wire conforming to Annex B and either galvanised in accordance with Annex C

or sheathed in a polymeric material of a minimum wall thickness of 0,5 mm, resistant to liquid

hydrocarbon or liquid chemicals as agreed between purchaser and manufacturer (see Annex A);

— aluminium wire conforming to ISO 209.
Key
1 internal wire
2 film
3 fabric
4 external wire
Figure 1 — Section of a typical thermoplastic multi-layer hose
6 Dimensions
6.1 Inside diameters, with tolerances and minimum bend radii

When measured in accordance with ISO 4671, the values of the internal diameters of the hose shall

conform to Table 2. When tested by the method specified in ISO 10619-1 the value of the minimum bend

radius shall be as given in Table 2. The hose shall show no sign of permanent deformation of the cross

section i.e. kinking.
© ISO 2014 – All rights reserved 3
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ISO 27126:2014(E)
Table 2 — Dimensions and minimum bend radii
Dimensions in millimetres, except where specified as “inch”
Inside diameter Tolerance Minimum bend radii
mm Inch Type 1 Type 2 Type 3 Type 4
25 1 ±1 125 125 200 200
32 1,1/4 ±1 150 150 200 200
38 1,1/2 ±1 150 150 200 200
40 1,1/2 ±1 150 150 200 200
50 2 ±1 200 200 225 225
65 2,1/2 ±2 200 200 225 225
75 3 ±2 280 280 300 300
80 3 ±2 300 300 350 350
100 4 ±2 400 400 400 400
125 5 ±2 500 500 500 —
150 6 ±3 575 575 575 —
200 8 ±3 800 800 800 —
250 10 ±3 1 000 1 000 1 000 —
300 12 ±3 1 200 1 200 1 200 —
6.2 Tolerance on length

When tested in accordance with ISO 4671, the tolerance on the measured length of delivered hose

assemblies shall be % .
7 Performance requirements of hoses and hose assemblies
7.1 Cover

When tested in accordance with ISO 2411, the adhesion between the fabric used for the outer cover and

its abrasion resistant coating shall be not less than 1,5 kN/m.
7.2 Hoses

When tested in accordance with the methods given in Table 3, the physical properties of the hoses shall

conform to Table 3.
4 © ISO 2014 – All rights reserved
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