SIST EN ISO 10380:2013

SLOVENSKI STANDARD
01-april-2013
1DGRPHãþD
SIST EN ISO 10380:2004
&HYRYRG9DORYLWHNRYLQVNHFHYLLQFHYQLSULNOMXþNL,62
Pipework - Corrugated metal hoses and hose assemblies (ISO 10380:2012)
Rohrleitungen - Gewellte Metallschläuche und Metallschlauchleitungen (ISO
10380:2012)
Tuyauteries - Tuyaux et tuyauteries métalliques flexibles onduleux (ISO 10380:2012)
Ta slovenski standard je istoveten z: EN ISO 10380:2012
ICS:
23.040.10 Železne in jeklene cevi Iron and steel pipes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 10380
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2012
ICS 23.040.70 Supersedes EN ISO 10380:2003
English Version
Pipework - Corrugated metal hoses and hose assemblies (ISO
10380:2012)
Tuyauteries - Tuyaux et tuyauteries métalliques flexibles Rohrleitungen - Gewellte Metallschläuche und
onduleux (ISO 10380:2012) Metallschlauchleitungen (ISO 10380:2012)
This European Standard was approved by CEN on 30 September 2012.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10380:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 10380:2012) has been prepared by Technical Committee CEN/TC 342 “Metal hoses,
hose assemblies, bellows and expansion joints", the secretariat of which is held by SNV, in collaboration with
Technical Committee ISO/TC 5 “Ferrous metal pipes and metallic fittings".
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by April 2013, and conflicting national standards shall be withdrawn at the
latest by April 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 10380:2003.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
INTERNATIONAL ISO
STANDARD 10380
Third edition
2012-10-01
Pipework — Corrugated metal hoses and
hose assemblies
Tuyauteries — Tuyaux et tuyauteries métalliques flexibles onduleux
Reference number
ISO 10380:2012(E)
©
ISO 2012
ISO 10380:2012(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing 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
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Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 10380:2012(E)
Contents Page
Foreword .iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design requirements . 4
4.1 General . 4
4.2 Nominal sizes, DN . 5
4.3 Overall length, l . 6
O
4.4 Hose design . 6
4.5 Materials . 6
4.6 Braiding . 7
4.7 Pressure . 9
4.8 Temperature . 9
4.9 Corrosion .10
4.10 Cleanliness . 11
4.11 Electrical conductivity . 11
4.12 Flow velocity . 11
4.13 Additional protection .12
4.14 Hose joining .14
4.15 Attachment of end fittings to hose .15
4.16 Design parameters for corrugated metal hoses and metal hose assemblies .16
5 Performance requirements and tests .16
5.1 General .16
5.2 Leaktightness .17
5.3 Pressure resistance .17
5.4 Elongation .18
5.5 Burst pressure .18
5.6 Pliability .19
5.7 Fatigue .21
5.8 Electrical conductivity .26
6 Evaluation of conformity .26
6.1 Declaration of products relating to the conformity assessment method .26
6.2 General .27
6.3 Initial type testing .27
6.4 Subsequent type testing .28
6.5 Factory production control (FPC) .28
6.6 Final assessment .30
7 Installation instructions, packaging, designation and marking .31
7.1 Installation instructions .31
7.2 Packaging .31
7.3 Designation .31
7.4 Marking .32
Annex A (normative) Equivalent European material specifications .33
Bibliography .36
ISO 10380:2012(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 10380 was prepared by the European Committee for Standardization (CEN) Technical Committee
CEN/TC 342, Metal hoses, hose assemblies, bellows and expansion joints, in collaboration with ISO Technical
Committee TC 5, Ferrous metal pipes and metallic fittings, Subcommittee SC 11, Metal hoses and expansion
joints, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 10380:2003), which has been technically revised.
iv © ISO 2012 – All rights reserved

ISO 10380:2012(E)
Introduction
It was decided to produce an International Standard under the Vienna Agreement on technical cooperation between
ISO and the European Committee for Standardization (CEN) in order to maintain a unique EN ISO document.
The major changes in this revision of this International Standard are the following:
— update of the structure of the International Standard;
— update of the test and performance requirements to reflect the practice of the industry at the time of publication;
— introduction of an evaluation of conformity and a system of certification.
This International Standard is a base standard for corrugated metal hoses and hose assemblies for general purpose.
Corrugated metal hoses and metal hose assemblies conforming to all aspects of this International Standard
are considered to be designed and manufactured to sound engineering practice.
The requirements of this International Standard are of importance to designers, manufacturers, users, suppliers
and importers of corrugated metal hoses.
Non-permanent, detachable connections between hoses and fittings are available in the market. Their design
is not covered by this International Standard.
INTERNATIONAL STANDARD ISO 10380:2012(E)
Pipework — Corrugated metal hoses and hose assemblies
1 Scope
This International Standard specifies the minimum requirements for the design, manufacture, testing and
installation of corrugated metal hose and metal hose assemblies.
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 6208, Nickel and nickel alloy plate, sheet and strip
ISO 9328-7, Steel flat products for pressure purposes — Technical delivery conditions — Part 7: Stainless steels
ISO 9723, Nickel and nickel alloy bars
ISO 9724, Nickel and nickel alloy wire and drawing stock
ISO 13585, Brazing — Qualification test of brazers and brazing operators
ISO 15614-1, Specification and qualification of welding procedures for metallic materials — Welding procedure
test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys
ISO 16143-3, Stainless steels for general purposes — Part 3: Wire
EN 287-1, Qualification test of welders — Fusion welding — Part 1: Steels
EN 1652, Copper and copper alloys - Plate, sheet, strip and circles for general purposes
EN 1779, Non-destructive testing — Leak testing — Criteria for method and technique selection
EN 10028-7, Flat products made of steels for pressure purposes — Part 7: Stainless steels
EN 10088-1, Stainless steels — Part 1: List of stainless steels
EN 10088-3, 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
EN 10204, Metallic products — Types of inspection documents
EN 13133, Brazing — Brazer approval
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
corrugated metal hose
pressure-tight hose made from tube or from strip, with corrugations, helical or annular to the axis of the hose,
made by deforming the metal, its flexibility being obtained by bending the corrugations
NOTE 1 Classified by material, DN, PS at 20° C, bend radius and lifetime.
NOTE 2 In this International Standard, helical is designated “h” and annular is designated “a”.
ISO 10380:2012(E)
3.2
nominal size
DN
alphanumeric designation of size comprising the letters DN followed
by a dimensionless whole number which is indirectly related to the physical size, in millimetres, of the bore or
the outside diameter of the end connections, and is used as a reference
NOTE 1 This defined number does not represent a measurable value and cannot be used for calculation purposes
except where specified in the relevant standard.
NOTE 2 Adapted from ISO 6708.
NOTE 3 Adapted from ISO 7369:2004, definition 4.1.5.
3.3
strand
group of parallel wires that are woven together to form a single layer of braid
3.4
braid pitch
distance measured parallel to the axis of the braid for one complete turn or revolution of a strand
3.5
braided braid
braid that is manufactured from previously braided strands
3.6
metal hose assembly
assembly of a corrugated metal hose with its end fittings subjected to internal or external pressure
See Figure 1.
2 © ISO 2012 – All rights reserved

ISO 10380:2012(E)
l
O
l
L
Key
1 end fitting
2 ferrule
3 corrugated metal hose/braid
D internal diameter
i
D outside diameter
O
l active live length
L
l overall length
O
q pitch of the hose profile
Figure 1 — Metal hose assembly
3.7
nominal pressure
PN
numerical designation which is a convenient rounded number for reference purposes
[ISO 7369:2004, definition 3.3]
NOTE 1 This defined number is a dimensionless number indirectly related to a pressure value in bar(s).
NOTE 2 Adapted from ISO 7268. See EN 1333.
3.8
maximum allowable pressure
PS
p
S
maximum pressure at the operating temperature for which the hose assembly is designed, as specified by
the manufacturer
3.9
operating temperature
TS
extreme operating temperature, positive or negative, for which the hose assembly is designed
ISO 10380:2012(E)
3.10
active live length
l
L
corrugated metal hose length to be taken into account for the design of the hose assemblies subjected to
repeated movements
3.11
type testing
group of tests to be performed in order to verify that the performance level of the product meets the requirements
of a standard
3.12
qualified procedure
manufacturing and design process demonstrated by tests and described in detail in process instructions for the
specific manufacturing or design
NOTE For products subject to specific quality surveillance systems, such procedures can be qualified by the required
authorities or person.
3.13
third-party conformity assessment activity
conformity valuation activity that is performed by a person or body independent of the person or organization
who/which provides the object, and independent of user interests in that object
NOTE 1 Criteria for the independence of conformity assessment bodies and accreditation bodies are provided in the
International Standards and Guides applicable to their activities.
NOTE 2 The first-, second- and third-party descriptors used to characterize conformity assessment activities with
respect to a given object are not to be confused with the legal identification of the relevant parties to a contract.
3.14
certification
third-party attestation related to products, processes, systems or persons
NOTE 1 Certification of a management system is sometimes also called registration.
NOTE 2 Certification is applicable to all objects of conformity assessment except for conformity assessment bodies
themselves, to which accreditation is applicable.
3.15
test pressure
P
T
differential pressure to which the hose assembly or the component is subjected during a test at ambient temperature
NOTE Adapted from ISO 7369:2004, definition 3.8.
3.16
manufacturer
producer of corrugated metal hose or producer of corrugated metal hose and metal hose assemblies
3.17
assembler
fabricator of metal hose assemblies with corrugated metal hose purchased from manufacturers
4 Design requirements
4.1 General
Corrugated metal hoses, braided or unbraided, and their assemblies are designed to allow frequent movement
or pliability.
4 © ISO 2012 – All rights reserved

ISO 10380:2012(E)
These design requirements shall ensure that the construction of corrugated metal hoses, where properly
installed and used correctly, under chemical, mechanical and thermal conditions for general use, provide long-
term safe operation without degradation.
Corrugated metal hoses are divided into the following four different types (see Table 7) and tested accordingly,
as described in Clause 5:
— type 1-50: corrugated metal hoses of high flexibility with high fatigue life;
— type 1-10: corrugated metal hoses of high flexibility with medium fatigue life;
— type 2-10: corrugated metal hoses of average flexibility;
— type 3: corrugated metal hoses where only pliability is required.
Corresponding radii for pliability tests are given in Table 6 and corresponding radii for fatigue tests are
given in Table 8.
NOTE 1 The fatigue life of a corrugated metal hose is mainly affected by bend radius, pressure and temperature:
— at a given bend radius, fatigue life increases by lowering the working pressure;
— at a given working pressure, fatigue life increases by increasing the bend radius.
NOTE 2 Passing a test does not imply that the minimum or average fatigue life can be reached in circumstances other
than those specified in the test procedure.
NOTE 3 Where a user requires a higher fatigue life than given in this International Standard, the manufacturer can
be consulted.
NOTE 4 The installation configuration, such as type of movement, pressure characteristics and environmental
condition, have a strong influence on the fatigue life of a corrugated metal hose assembly.
NOTE 5 The lubrication condition of the braid influences the fatigue life of a corrugated metal hose. A reduction of
lubrication can occur during assembly, cleaning, transportation, storage or in service conditions.
4.2 Nominal sizes, DN
The designation of standard nominal sizes shall be as given in Table 1. The internal diameter of a corrugated
metal hose shall not be less than 98 % of its nominal size designation.
Table 1 — Nominal sizes, DN
DN
ISO 10380:2012(E)
Table 1 (continued)
DN
Other nominal sizes can be produced in accordance with the customer’s requirements. Their performance (see
Clause 5) should be interpolated from the values for the nearest nominal sizes, as given in Table 1.
4.3 Overall length, l
O
If not explicitly otherwise specified between the manufacturer and purchaser, the overall length, l , of a metal
O
hose assembly shall be the length as ordered to a tolerance of +3 % and –1 %.
For short hose assemblies, these tolerances do not apply because often a tolerance of one corrugation is
necessary, depending on the attachment technology of fittings. On no account shall the overall length be less
than 99 % of the length as ordered.
NOTE For minimum overall length of a braided hose assembly, see 4.6.
4.4 Hose design
The corrugated metal hose shall be made from seamless tube, welded tube or strip. Where welded construction
is used, the hose may be butt- or lap-welded, the weld being axial or spiral along the length of the hose and in
accordance with qualified welding and forming procedures. Corrugations may be annular or helical.
The corrugation shall be of regular form, continuous and concentric along the length of the hose, and shall
be free of defects, such as scores, dents, cuts or weld variations, which can cause premature failure. Where
required, a hose can be heat treated after forming.
NOTE Heat treatment influences flexibility, fatigue life and pressure-bearing capacity. It is, therefore, necessary for
the manufacturer to provide details on the characteristics affected by this type of treatment.
4.5 Materials
Materials for the manufacture of corrugated metal hoses and metal hose assemblies shall be selected on the
basis of their suitability for fabrication (cold forming, welding, etc.) and for the conditions under which they shall
be used. A list of suitable materials is given in Table 2.
Alternative equivalent European material designations are given in Table A.3.
6 © ISO 2012 – All rights reserved

ISO 10380:2012(E)
Table 2 — Materials
a
Material of construction Corrugated metal hose Braid End fitting and ferrule
Stainless steel hose Austenitic stainless steel in Austenitic stainless steel in Austenitic stainless steel
assemblies accordance with accordance with in accordance with the
ISO 9328-7, grades ISO 16143-3, grades composition given in
X2CrNi19-11, X2CrNi19-11, ISO 9328-7, grades
X6CrNiTi18-10, X5CrNi18-9, X2CrNi19-11,
X2CrNiMo17-12-2, X6CrNiTi18-10, X5CrNi18-9,
X5CrNiMo17-12-2, X2CrNiMo17-12-2, X6CrNiTi18-10,
X6CrNiMoTi17-12-2, X5CrNiMo17-12-2 and X2CrNiMo17-12-2,
X2CrNiMo18-14-3, X6CrNiMoTi17-12-2 X5CrNiMo17-12-2 and
X1CrNiMoCuN20-18-7 X6CrNiMoTi17-12-2
and
Carbon steel containing a
X1NiCrMoCu25-20-5
maximum of 0,05 % sulfur and
b
0,05 % phosphorus
Copper-based alloy, if formed,
deep-drawing quality.
Copper-based alloy hose Deep-drawing quality phosphor Phosphor bronze containing a Copper-based alloy, if formed,
assemblies bronze containing a minimum minimum of 95 % copper and deep-drawing quality.
of 95 % copper and 1 % tin. 1 % tin.
Nickel alloy hose assemblies Nickel alloy strip in accordance Austenitic stainless steel in Austenitic stainless steel
with accordance with in accordance with the
ISO 6208, grades ISO 16143-3, grades composition of
NiMo16Cr15Fe6W4, X2CrNi19-11, ISO 9328-7, grades
NiCu30, X5CrNi18-9, X2CrNi19-11,
NiCr15Fe8, X6CrNiTi18-10, X5CrNi18-9,
NiCr22Mo9Nb, X2CrNiMo17-12-2, X6CrNiTi18-10,
FeNi32Cr21AlTi and X5CrNiMo17-12-2 and X2CrNiMo17-12-2,
NiFe30Cr21Mo3 X6CrNiMoTi17-12-2 X5CrNiMo17-12-2 and
X6CrNiMoTi17-12-2
Nickel alloy wire in accordance
with Nickel alloy bar in accordance
ISO 9724, grades with
NiMo16Cr15 Fe6W4, ISO 9723, grades
NiCu30, NiMo16Cr15 Fe6W4,
NiCr15Fe8, NiCu30,
NiCr22Mo9Nb, NiCr15Fe8,
FeNi32Cr21AlTi and NiCr22Mo9Nb,
NiFe30Cr21Mo3 FeNi32Cr21AlTi and
NiFe30Cr21Mo3
a
The material specified for end fittings applies only to the parts which are welded or brazed to the hose.
b
Carbon steel shall not be used for ferrules.
4.6 Braiding
Where braided, the corrugated metal hose shall be uniformly covered by wire, either machine-woven around
the hose or tightly fitted by hand as a stocking.
Where the braid (see Figure 2) is fitted by hand as a stocking, suitable design and manufacturing measures
shall be taken to fit the braid as tightly as possible. However, the performance level of such a braid can still be
different from that of a machine-woven braid around the hose. In addition, if machine and hand-fitted braiding
are used on the same assembly (double braiding), special care shall be taken regarding the performance of
such a combination. Therefore, the performance level shall be verified.
Braid irregularities, such as wire crossings and wire loops, can have an influence on the performance of the
product. The manufacturer shall take care to limit such features.
The wires of a strand should all have a similar tension.
The practical burst strength also depends on the method used to attach the braiding to the end fittings and shall
be established by burst tests, as described in 5.5.
Braided braid shall be considered appropriate for the large nominal sizes and heavy-duty applications.
ISO 10380:2012(E)
Friction between hose and braid has a strong influence on the fatigue life of dynamic hose installations.
Manufacturers shall indicate the need for lubrication of specific applications.
Where braid is connected to end fittings, care shall be taken to ensure that all the braid wires are securely
bonded to the end fittings.
The breaking of individual braid wires during service reduces the tensile strength of a braid. The manufacturer shall
inform the user accordingly and include the check for wire defects in the maintenance instructions for the user.
Braid performance shall always be verified by type testing.
NOTE 1 A theoretical approximate tensile force of a single braid, f, can be calculated using Formula (1) at 20 °C:
d
 
fC=⋅W ⋅ ⋅⋅π R ⋅cos()α (1)
m
 
 
where
C is the number of strands;
W is the number of wires in each strand;
d is the diameter of individual wire, in millimetres;
R is the tensile strength of the material of the wires;
m
α is the braid angle, in degrees.
The theoretical breaking pressure, B, of a single braid is given by Formula (2):
f
B = (2)
A
e
where A is the effective thrust area of the hose.
e
If multiple braids are used, the tension strengths of the second and third braids are not as high as that of the
first braid and are approximately as given by Formulae (3) and (4):
Double braid:
ff≈⋅18, (3)
21ax ax
Triple braids:
(4)
ff≈⋅26,
31ax ax
where
is the theoretical tensile strength of one braid;
f
1ax
f is the theoretical tensile strength of two braids;
2ax
is the theoretical tensile strength of triple braids.
f
3ax
NOTE 2 Formulae (3) and (4) are only applicable to braidings of similar characteristics to those of the single braid.
8 © ISO 2012 – All rights reserved

ISO 10380:2012(E)
α
Key
1 strand
α braid angle
d diameter of individual wire
q braid pitch
B
Figure 2 — Braid
NOTE 3 For pressurized hose assemblies, a braid angle of between 40° and 50° is used.
To meet the characteristics given in this International Standard, braided metal hose assemblies shall be of such
a length that there is at least one complete revolution (braid pitch) of braid along the length of the hose.
4.7 Pressure
The maximum allowable pressure of the hose assembly shall be the lowest of any component of a corrugated
metal hose assembly.
It is essential that the maximum operating pressure, including surge pressure to which the hose is subjected in
service, not exceed the specified maximum allowable pressure.
The permanent elongation of a corrugated metal hose with its ends closed and after being pressurized to its
test pressure shall not exceed 1 %.
NOTE 1 The length of a hose assembly under positive pressure increases, and decreases under negative pressure.
NOTE 2 Corrugated metal hoses can be compliant with one of the following PN: 0,5; 1; 2,5; 6; 10; 16; 20; 25; 40; 50;
63; 100; 150; 160; 250; 320; 400 or 450.
4.8 Temperature
The maximum allowable pressure, p , of a corrugated metal hose assembly at any temperature is the lowest
S
value of the pressure at 20 °C of each component multiplied by its appropriate derating factor, C .
t
The derating factors, C , for the materials are indicated in Table 3.
t
Alternative derating factors, C , for European material designations are given in Table A.4.
t
ISO 10380:2012(E)
Table 3 — Derating factors, C , and limiting temperatures
t
Temperature 20 50 100 150 200 250 300 350 400 450 500 550 600 650
°C
− −
X2CrNi19-11 1 0,87 0,72 0,65 0,59 0,55 0,51 0,48 0,46 0,45 0,44 0,43
X5CrNi18-10 1 0,88 0,73 0,66 0,60 0,56 0,52 0,50 0,48 0,47 0,46 0,42 − −
X6CrNiTi18-10 1 0,92 0,83 0,78 0,74 0,71 0,67 0,64 0,62 0,61 0,60 0,59 − −
X2CrNiMo17-12-2 1 0,88 0,74 0,67 0,62 0,58 0,54 0,52 0,50 0,48 0,47 0,47 − −
X5CrNiMo17-12-2 1 0,90 0,78 0,71 0,66 0,62 0,58 0,56 0,53 0,52 0,51 0,51 − −
− −
X6CrNiMoTi-17-12-2 1 0,90 0,81 0,76 0,73 0,69 0,65 0,63 0,61 0,59 0,59 0,58
X2CrNiM18-14-3 1 0,88 0,74 0,67 0,61 0,57 0,54 0,52 0,50 0,48 0,47 0,47 − −
X1CrNiMoCuN20-18-7 1 0,90 0,77 0,70 0,64 0,61 0,57 0,56 0,54 0,53 0,52 − − −
X1NiCrMoCu25-20-5 1 0,93 0,87 0,82 0,76 0,70 0,65 0,61 0,57 0,54 0,52 0,50 − −
a b b
— 1 0,97 0,91 0,84 0,77 0,71 0,65 0,60 0,57 0,29 0,18 − − −
c
− − − − −
NiMo16Cr15Fe6W4 1 0,97 0,92 0,88 0,83 0,79 0,74 0,72 0,70
c
NiCr30 1 0,94 0,86 0,81 0,77 0,75 0,74 0,74 0,74 0,73 − − − −
c b b b
NiCr15Fe8 1 0,98 0,94 0,92 0,89 0,86 0,83 0,83 0,83 0,82 0,81 0,78 0,54 0,36
c b
NiCr22Mo9Nb 1 0,95 0,88 0,84 0,80 0,78 0,75 0,73 0,70 0,68 0,65 0,64 0,63 0,5
c b
FeNi32Cr21AlTi 1 0,93 0,80 0,74 0,68 0,63 0,58 0,55 0,53 0,51 0,50 0,49 0,48 0,39
c
− −
NiFe30Cr2Mo3 1 0,95 0,89 0,83 0,77 0,75 0,74 0,72 0,70 0,68 0,67 0,66
NOTE 1   The derating factor applicable to low temperatures for some of the austenitic materials listed is higher than 1. For further information, contact
the manufacturer.
NOTE 2   Stainless steel designations and values are specified in ISO 9328-7 for 1 % proof C product form, carbon steel designations are specified in
ISO 6317 and nickel alloy designations are specified in ISO 6208.
a
Typical non-alloyed carbon steel.
b
Values in the creep range (100 000 h).
c
Indicative values from industrial background.
4.9 Corrosion
Corrugated metal hoses and hose assemblies shall have adequate resistance to all the corrosive agents to
which they are likely to be exposed during their lifetime.
Special consideration shall be given to pitting corrosion, crevice corrosion, stress corrosion cracking and
intergranular corrosion.
All parts of the corrugated metal hose assembly exposed to corrosion shall take into account the corrosion risk,
both by the selection of appropriate shapes for the parts used and by the selection of appropriate materials.
NOTE 1 Corrugated metal hoses usually have a substantially smaller wall thickness than all other parts of the system
in which they are installed. Hence, they are often manufactured from a material having a higher corrosion resistance than
that used in the adjacent components.
For use of materials in corrosive environments, see the specification of the selected material, corrosion
resistance tables and/or experience of the corrugated metal hose manufacturer.
NOTE 2 Concerning their corrosion resistance, suitable materials for corrugated metal hoses can be classified as
specified in Table 4.
10 © ISO 2012 – All rights reserved
Material
ISO 10380:2012(E)
Table 4 — Typical classification of materials for corrosion resistance
Corrosion Description Material grade Examples
resistance class
Basic corrosion Stainless steels X2CrNi19-11
A
resistance X6CrNiTi18-10
Good corrosion Mo-alloyed stainless steels X2CrNiMo17-12-2
B
resistance X5CrNiMo17-12-2
Advanced corrosion Super-alloyed stainless X1CrNiMoCuN20-18-7
C
resistance steels X1NiCrMoCu25-20-5
High corrosion Ni-based alloys NiCr22Mo9Nb (NW 6625)
D
resistance
NOTE 3 If required, the corrosion resistance of a hose can be increased by some form of internal and/or external protection.
NOTE 4 Heat treatment of the corrugated metal hose material improves the corrosion resistance characteristics, but
modify the mechanical properties of the metal hose assembly.
4.10 Cleanliness
Hoses and hose assemblies shall be supplied to the purchaser free of water and substantially free of visible
residues on inner and outer surfaces.
NOTE 1 Being free of visible residues corresponds to less than 500 mg/m .
NOTE 2 A more stringent cleanliness level can be required depending on the application.
Water used for cleaning procedures shall contain a maximum chlorine level of 30 mg/dm .
4.11 Electrical conductivity
Under certain conditions, flowing media in corrugated metal hoses can cause an electrostatic charge, which can
result in sparking. Sparks can perforate the hose wall or create explosions or fire in dangerous environments.
Metal hose assemblies, which are made exclusively out of metal, have adequate conductivity to discharge
occurring currents where being grounded. If grounding is not possible, stray current shall be avoided.
With metal hose assemblies having one or more non-metallic component(s) (insulation, gasket, internal liner,
etc.), suitable measures shall be taken to discharge the assembly, for instance through the use of materials
with sufficient discharge capacity. Electrical fields caused by electrostatically charged media shall be shielded
from the hose assembly.
4.12 Flow velocity
Flow velocity shall be considered in the design of a hose assembly.
ISO 10380:2012(E)
Flow velocity is given by:
Q ⋅4
v
V = (5)
π⋅D
i
or
Q ⋅4
m
V = (6)
ρ ⋅⋅π D ²
i
where
V is the flow velocity;
Q is the volumetric flow rate;
v
Q is the mass flow rate;
m
D is the internal diameter of the corrugated hose, in millimetres;
i
ρ is the medium density.
NOTE High velocities can force the corrugations into resonant vibration, resulting in premature failure. Such failure
can be prevented through the use of an internal liner or change of the nominal size, DN. The critical speed is mostly
influenced by the medium conveyed and its working conditions, the shape of the corrugations and hose bending. It can
start from 5 m/s for liquids and 30 m/s for gases. For higher values, it is intended that the manufacturer be consulted.
4.13 Additional protection
Where required, corrugated metal hose assemblies shall be provided with additional internal or external
protection to prevent mechanical damage. This shall be provided by the following:
— an anti-abrasion protective coil of metal or non-metal material suitable for the operation conditions
envisaged [see Figure 3 a)];
— an additional inner or outer sleeve resistant to wear, weathering and abrasion [see Figures 3 b) and c)];
— other means of protection, such as heat shielding, fire protection and local overbending protection [see
Figure 3 d)].
Key
1 anti-abrasion protective coil
a) Anti-abrasion protective coil
12 © ISO 2012 – All rights reserved

ISO 10380:2012(E)
a
a
Key
1 additional sleeve resistant to tear
a
Direction of flow.
b) Internal liner
Key
1 additional sleeve resistant to tear
c) Outside protection using strip-wound hose
ISO 10380:2012(E)
Key
1 ferrule
2 local overbending protection
3 metal hose assembly
d) End protection against overbending using strip-wound hose
Figure 3 — Possible protective solutions
Where additional protection affects the bend radii given in Table 6 and Table 8 or negatively influences the
fatigue life of the hose assembly, the manufacturer shall notify the purchaser accordingly.
Where a protective coating is used on a stainless steel hose, it shall not contain zinc, lead or tin.
Where the material of a synthetic cover contains corrosive agents, such as chlorine or sulfur, care shall be
taken to ensure that such agents are not released during the manufacturing process or in service.
4.14 Hose joining
Where a manufacturer uses hose joints in order to increase the hose length, such joints shall be either butt-
welded or edge-welded, as shown in Figure 4, and shall be in accordance with qualified procedures.
14 © ISO 2012 – All rights reserved

ISO 10380:2012(E)
a) Butt-welded
b) Edge-welded
Figure 4 — Details of butt-welded and edge-welded hose joints
4.15 Attachment of end fittings to hose
Corrugated metal hoses are attached to many standardized and custom-designed fittings.
Standardized end fittings shall be of the material given in Table 2. Their ends shall be shaped and prepared in
such a way that they allow correct welding or brazing to the hose.
NOTE For example, ISO 10806 can be applicable.
Where custom-designed fittings are used, methods and performance of the connection between corrugated
metal hose and fittings shall be determined between the manufacturer or assembler and user.
The connection between the corrugated metal hose and the end fitting shall be made by a method resulting in
a permanent non-detachable connection, which can only be detached by irreparably damaging the hose or the
end fitting. The connection shall ensure leaktightness and shall withstand all the tests specified in Clause 5.
All joining methods used in the manufacturing of metal hose assemblies shall be qualified.
Welder qualifications and welding procedure qualifications shall be in accordance with EN 287-1 and
ISO 15614-1; brazer qualification and brazing procedure qualification shall be in accordance with EN 13133
and ISO 13585.
Where welding penetration reduces the internal diameter, the flow performance shall be verified.
Where crevice- and burr-free connections are required, they shall be specified by the purchaser.
ISO 10380:2012(E)
4.16 Design parameters for corrugated metal hoses and metal hose assemblies
4.16.1 The following information is required for the correct design of the metal hoses:
a) nominal size, DN;
b) flexibility type;
c) minimum and maximum operating pressures;
d) working temperature range;
e) materials.
4.16.2 The following additional information is required for the correct design of the metal hose assemblies:
a) medium to be conveyed;
b) maximum operating pressure;
c) maximum operating temperature;
d) minimum bend radius;
...