ISO/PWI 27127
(Main)Thermoplastic multi-layer (non-vulcanized) hoses and hose assemblies for the transfer of liquid petroleum gas and liquefied natural gas — Specification
Thermoplastic multi-layer (non-vulcanized) hoses and hose assemblies for the transfer of liquid petroleum gas and liquefied natural gas — Specification
Tuyaux et flexibles multicouches (non vulcanisés) thermoplastiques pour le transfert de gaz de pétrole liquide et de gaz naturel liquéfié — Spécifications
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DRAFT INTERNATIONAL STANDARD ISO/DIS 27127
ISO/TC 45/SC 1 Secretariat: DSM
Voting begins on: Voting terminates on:
2007-07-20 2007-12-20
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Thermoplastic multi-layer (non-vulcanized) hoses and hose
assemblies for the transfer of liquid petroleum gas and liquefied
natural gas — Specification
Tuyaux et flexibles multicouches (non vulcanisés) thermoplastiques pour le transfert de gaz de pétrole liquide et
de gaz naturel liquéfié — Spécifications
ICS 75.200; 83.140.40
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©
International Organization for Standardization, 2007
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ISO/DIS 27127
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ii ISO 2007 – All rights reserved
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ISO/DIS 27127
Contents Page
Foreword. iv
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 1
4 Classification. 2
5 Materials and construction . 2
6 Dimensions. 3
7 Performance requirements of hoses and hose assemblies. 4
8 Test frequency. 6
9 Type tests. 6
10 Marking. 7
Annex A (normative) Crush recovery test . 8
Annex B (normative) Method of test for thermal ageing. 10
Annex C (normative) Method of test of fittings subjected to low temperatures. 11
Annex D (normative) Sequence of hydrostatic tests. 12
Annex E (normative) Method of test for fitting security. 13
Annex F (normative) Method of test for leak tightness. 14
Annex G (normative) Type and routine tests for hoses and hose assemblies. 15
Annex H (informative) Batch tests for hoses and hose assemblies . 16
Bibliography . 17
© ISO 2007 – All rights reserved iii
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ISO/DIS 27127
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 27127 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee
SC 1, Hoses (rubber and plastics).
iv © ISO 2007 – All rights reserved
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DRAFT INTERNATIONAL STANDARD ISO/DIS 27127
Thermoplastic multi-layer (non-vulcanized) hoses and hose
assemblies for the transfer of liquid petroleum gas and
liquefied natural gas — Specification
1 Scope
This International Standard specifies requirements for two types of thermoplastic multi-layer (non-vulcanized)
transfer hoses and hose assemblies for carrying liquefied petroleum gas and liquefied natural gas. Each type
is subdivided into two classes, one for on shore duties, and the other for offshore.
)
1
It specifies sizes from 25 mm to 250 mm, working pressures from 10,5 bar to 25 bar and operating
° °
temperatures from –175 C to +45 C.
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.
EN 590, Automotive fuels - Diesel - Requirements and test methods
ISO 148-1, Metallic materials - Charpy impact test - Part 1: Test method
EN 10088-1, Stainless steels — Part 1: List of stainless steels
ISO 7326, Rubber and plastics hoses - Assessment of ozone resistance under static conditions.
ISO 1402, Rubber and plastics hoses and hose assemblies - Hydrostatic testing
ISO 1043-1, Plastics - Symbols and abbreviated terms - Part 1: Basic polymers and their special
characteristics
ISO 1746, Rubber or plastics hoses and tubing - Bending tests
ISO 4671, Rubber and plastics hose and hose assemblies - Methods of measurement of dimensions
ISO 4672, Rubber and plastics hoses - Sub-ambient temperature flexibility tests.
ISO 8031, Rubber and plastics hoses and hose assemblies - Determination of electrical resistance
ISO 8330:2000, Rubber and plastics hoses and hose assemblies - Vocabulary
BS 2782-3, Method 326 – B:1977
3 Terms and definitions
For the purpose of this standard, the terms and definitions given in ISO 8330 apply.
WARNING — Persons using this International Standard should be familiar with normal laboratory
practice. This standard does not purport to address all the safety problems, if any, associated with its
)
1
1 bar = 0,1 MPa.
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ISO/DIS 27127
use. It is the responsibility of the user to establish appropriate health and safety practices and to
ensure compliance with any national regulatory conditions.
4 Classification
Hoses are classified according to their usage, working pressure and working temperature range as given in
Table 1.
Table 1 — Pressure and temperature range
a b
Pressure/temperature Class A Class B
Class A Class B
Type 1 Type 1 Type 2 Type 2
Maximum working pressure (bar) 25 20 13 10,5
Proof pressure (bar) 37,5 30 19,5 15,8
Minimum burst pressure (bar) 100 100 52 52,5
°
Working temperature range (C) -50 ± 3 to +45 -50 ± 3 to +45 -175 ± 5 to +45 -175 ± 5 to +45
a
Class A is for use onshore
b
Class B is for use offshore
5 Materials and construction
Hoses shall be constructed as shown in Figure 1 and shall consist of the following:
5.1 Class A
an internal wire helix of stainless steel conforming to EN 10088-1:1995, numbers 1.4306, 1.4401, 1.4404
2)
or 1.4436;
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; and
an external wire helix of stainless steel conforming to EN 10088-1:1995, numbers 1.4306, 1.4401, 1.4404
or 1.4436
5.2 Class B
an internal wire helix of stainless steel conforming to EN 10088-1:1995, numbers 1.4401, 1.4404 or
1.4436;
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; and
2)
No ISO equivalent according to the knowledge of the project leader; but he invites suggestions from ISO/TC 45/SC 1
members as comments to this DIS
2 © ISO 2007 – All rights reserved
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ISO/DIS 27127
an external wire helix of stainless steel conforming to EN 10088-1:1995, numbers 1.4401, 1.4404 or
1.4436.
NOTE By agreement between manufacturer and purchaser, the outer layer may have colour identification.
4
1
2
3
Key
1 Inner wire
2 Film
3 Fabric
4 Outer wire
Figure 1 — Section of a typical thermoplastic multilayer hose
6 Dimensions
6.1 Internal diameters, with tolerances and minimum bend radii
When measured in accordance with ISO 4671, the values of the internal diameter of the hose shall confo
...
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