ISO/DIS 3949.3

DRAFT INTERNATIONAL STANDARD ISO/DIS 3949.3
ISO/TC 45/SC 1 Secretariat: BSI
Voting begins on Voting terminates on
2002-03-21 2002-08-21

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION

Tuyaux et flexibles en plastique — Types hydrauliques avec armature de textile — Spécifications

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

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

3 Classification........................................................................................................................................... 1

4 Materials and construction ..................................................................................................................... 2

4.1 Hoses....................................................................................................................................................... 2

5 Dimensions.............................................................................................................................................. 2

5.1 Diameters and concentricity................................................................................................................... 2

6 Hose requirements.................................................................................................................................. 3

6.1 Hydrostatic requirements ....................................................................................................................... 3

6.2 Minimum bend radius.............................................................................................................................. 3

6.3 Resistance to impulse............................................................................................................................. 4

6.4 Leakage of hose assemblies................................................................................................................... 4

6.5 Cold flexibility.......................................................................................................................................... 4

6.6 Fluid resistance....................................................................................................................................... 4

6.7 Ozone resistance..................................................................................................................................... 5

6.8 Electrical conductivity............................................................................................................................. 5

7 Designation.............................................................................................................................................. 5

8 Marking .................................................................................................................................................... 5

8.1 Hoses....................................................................................................................................................... 5

8.2 Hose assemblies ..................................................................................................................................... 6

Annex A (normative) Method of test for electrical conductivity......................................................................... 8

Annex B (informative) Length of hoses and hose assemblies........................................................................... 9

B.1 Hoses....................................................................................................................................................... 9

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patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

International Standard ISO 3949 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products,

This third edition cancels and replaces the second edition (ISO 3949:1991), which has been technically revised.

This International Standard specifies requirements for two types of textile-reinforced thermoplastics hose and hose

assembly of nominal bore from 5 to 25. Each type is divided into two classes dependent on electrical conductivity

 petroleum and synthetic-based hydraulic fluids HH,HL, HM, HR, and HV in accordance with ISO 6743-4 at

This standard does not include requirements for end fittings. It is limited to the performance of hoses and hose

NOTE Operating temperatures in excess of 100 °C may materially reduce the life of the hose.

The following normative documents contain provisions which, through reference in this text, constitute provisions of

this international standard. For dated references, subsequent amendments to, or revisions of, any of these

publications do not apply. However, parties to agreements based on this International Standard are encouraged to

investigate the possibility of applying the most recent editions of the normative documents indicated below. For

undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC

ISO 4397, Fluid power systems and components — Connectors and associated components — Nominal outside

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