ISO 17324:2014

INTERNATIONAL ISO
STANDARD 17324
First edition
2014-09-15
Rubber hoses for automotive
turbochargers — Specification
Tuyaux en caoutchouc pour turbocompresseurs automobiles —
Spécifications
Reference number
©
ISO 2014
© ISO 2014
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ii © ISO 2014 – All rights reserved

Contents  Page
Foreword .iv
1 Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Classification . 2
4.1 Types and classes . 2
4.2 Grades . 2
5  Materials and construction . 2
5.1 Materials . 2
5.2 Construction . 3
6  Dimensions and tolerances . 3
6.1 Inside diameter, wall thickness, and length tolerance . 3
6.2 Hose end squareness . 4
7 Physical properties . 5
7.1 Rubber compounds . 5
7.2 Hose . 7
8  Frequency of testing . 8
9  Marking . 9
10 Storage . 9
Annex A (normative) Fatigue resistance test .10
Annex B (normative) Type and routine tests .12
Annex C (informative)  Recommended production tests .13
Bibliography .15
Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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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
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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.
iv © ISO 2014 – All rights reserved

INTERNATIONAL STANDARD ISO 17324:2014(E)
Rubber hoses for automotive turbochargers —
Specification
1 Scope
This International Standard specifies requirements of rubber hoses used in the automotive turbocharger
system to connect turbocharger, intercooler, and internal combustion engine at the working temperatures
from −40°C to +250°C and the working pressures from −0,01MPa(−0,1bar) to 0,5MPa(5bar). Hoses
covered by this International Standard may be straight or shaped.
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 812, Rubber, vulcanized or thermoplastic — Determination of low-temperature brittleness
ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing
ISO 1431-1, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and
dynamic strain testing
ISO 1629, Rubber and latices — Nomenclature
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
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 8033, Rubber and plastics hoses — Determination of adhesion between components
ISO 8330, Rubber and plastics hoses and hose assemblies — Vocabulary
ISO 8331, Rubber and plastics hoses and hose assemblies — Guidelines for selection, storage, use and
maintenance
ISO 28702, Rubber and plastics hoses and tubing — Textile-reinforced types — Sub-ambient temperature
crush test
3  Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8330 and the abbreviated
terms given in ISO 1629 apply.
4  Classification
4.1  Types and classes
The hoses are classified into three types as per the intended operating conditions.
— Type A: hose for connecting air filter and turbocharger, to transfer filtered atmospheric air. Working
temperature from −40°C to +100°C, and vacuum pressure low to −0,01MPa(−0,1bar).
— Type B: hose for connecting turbocharger and intercooler, to transfer the pressurized and heated
air. Working temperature from −40°C to +250°C.
Type B is subdivided into three subtypes as per working temperature and further classified into classes
as per maximum working pressures. The subtypes and classes are shown in Table 1.
Table 1 — Subtypes and classes for Type B
Class
Working temperature
1 2 3
Type
°C
Maximum working pressure
MPa(bar)
B1 −40 approximately +180 0,16(1,6) 0,22(2,2) 0,28(2,8)
B2 −40 approximately +220 0,20(2,0) 0,28(2,8) 0,34(3,4)
B3 −40 approximately +250 0,30(3,0) 0,40(4,0) 0,50(5,0)
— Type C: hose for connecting intercooler and internal combustion engine, to transfer the pressurized
and cooled air. Working temperature from −40°C to +140°C and maximum working pressure 0,3 MPa
(3bar).
4.2 Grades
Type B and C of hose are classified into 2 grades as per fatigue resistance:
— Grade 200 — 200 000 impulse cycles;
— Grade 400 — 400 000 impulse cycles.
5  Materials and construction
5.1 Materials
The typical materials for the types of hoses are listed in Table 2.
2 © ISO 2014 – All rights reserved

Table 2 — Hose type and typical material
Dimensions in millimetres
Type Lining Reinforcement Cover
EPDM EPDM
CM CM
a
CR PET CR
b
A/C ECO PA ECO
AEM wire AEM
ACM ACM
VMQ VMQ
AEM AEM
a
PET
B1 ACM ACM
c
AR
VMQ VMQ
FKM VMQ
c
B2/B3 AR
FVMQ VMQ
NOTE — All the abbreviated words are defined in ISO 1629 excluded PET, PA, and AR.
a
PET — poly(ethylene terephthalate) fibre
b
PA — polyamide
c
AR — Aramid
5.2  Construction
The hoses shall consist of:
— a flexible polymeric elastomers lining;
— a synthetic textile reinforcement or other reinforcements, applied by any suitable technique;
— a flexible polymeric elastomers cover.
Hose body may have a smooth or corrugated finish, and be further reinforced with wire at suitable
positions, and may be covered with glass fibre cloth with aluminium-foil paper, or heat insulation or
abrasion resistant jacket made of thermoplastic material on suitable position.
NOTE Type A may be rubber tubing without reinforcement.
6  Dimensions and tolerances
6.1  Inside diameter, wall thickness, and length tolerance
Unless otherwise specified, when measured in accordance with ISO 4671, inside diameters and wall
thicknesses tolerances are given in Table 3 and length tolerances are given in Table 4.
Table 3 — Inside diameter, wall thickness tolerance
Dimensions in millimetres
Inside diameter and tolerance Tolerance of wall thickness
Extruded Wrapped
Inside diameter Tolerance
a
hose hose
≤ 35
+05,
±0,3 ±0,5
−13,
> 35 and ≤ 50
+05,
> 50 and ≤ 80
−13,
±0,8 ±1,0
+08,
> 80 and ≤ 110
−17,
+12,
> 110 and ≤ 150
−20,
±1,0 ±1,2
+16,
> 150
−25,
a
Overlap zone excluded
Table 4 — Length tolerance
Dimensions in millimetres
Length Tolerance
≤ 300 ±3
> 300 and ≤ 600 ±4,5
> 600 ±1 %
6.2  Hose end squareness
All the points on the end surface of a hose shall be in the tolerance zone, given in Table 5, which is defined
by two planes vertical to the longitudinal axis of th
...