SIST ISO 14743:2021
(Main)Pneumatic fluid power -- Push-in connectors for thermoplastic tubes
Pneumatic fluid power -- Push-in connectors for thermoplastic tubes
This document specifies the general requirements and test methods for the design and performance of push-in connectors for use with thermoplastic tubes with outside diameters (OD) from 3 mm to 16 mm including dimensions in inches.
This document is intended to establish uniform methods of testing complete push-in connector assemblies as used in pneumatic fluid power applications. It is not applicable to air braking systems.
Transmissions pneumatiques -- Raccords instantanés pour tubes thermoplastiques
Le présent document spécifie les exigences générales et les méthodes d'essai pour la conception et les performances des raccords instantanés destinés ŕ ętre utilisés avec des tubes thermoplastiques de diamčtre extérieur (DE) compris entre 3 mm et 16 mm inclus.
Le présent document établit des méthodes d'essai uniformes de l'ensemble complet du raccord instantané, tel qu'il est utilisé dans les applications de transmissions pneumatiques. Elle ne s'applique pas aux systčmes de freinage ŕ air.
Fluidna tehnika - Pnevmatika - Vtični priključki za plastomerne cevi
General Information
Relations
Buy Standard
Standards Content (Sample)
SLOVENSKI STANDARD
SIST ISO 14743:2021
01-julij-2021
Nadomešča:
SIST ISO 14743:2005
Fluidna tehnika - Pnevmatika - Vtični priključki za plastomerne cevi
Pneumatic fluid power -- Push-in connectors for thermoplastic tubes
Transmissions pneumatiques -- Raccords instantanés pour tubes thermoplastiques
Ta slovenski standard je istoveten z: ISO 14743:2020
ICS:
23.100.40 Cevna napeljava in sklopke Piping and couplings
SIST ISO 14743:2021 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST ISO 14743:2021
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SIST ISO 14743:2021
INTERNATIONAL ISO
STANDARD 14743
Second edition
2020-01
Pneumatic fluid power — Push-in
connectors for thermoplastic tubes
Transmissions pneumatiques — Raccords instantanés pour tubes
thermoplastiques
Reference number
ISO 14743:2020(E)
©
ISO 2020
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SIST ISO 14743:2021
ISO 14743:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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SIST ISO 14743:2021
ISO 14743:2020(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Working conditions . 1
5 Features . 2
6 OD of tube . 2
7 Design . 2
8 Marking .12
9 Performance requirements and testing .12
9.1 General .12
9.2 Test samples .12
9.3 Tensile test .13
9.3.1 Procedure .13
9.3.2 Pass/fail criteria .13
9.4 Pressure at maximum temperature test (for PA tubing only) .13
9.4.1 Description . . .13
9.4.2 Apparatus .13
9.4.3 Procedure .14
9.4.4 Pass/fail criteria .14
9.5 Proof and burst pressure test (for PA tubing only) .14
9.5.1 Description . . .14
9.5.2 Apparatus .14
9.5.3 Procedure .14
9.5.4 Pass/fail criteria .15
9.6 Connecting force test .15
9.6.1 Apparatus .15
9.6.2 Procedure .15
9.6.3 Pass/fail criteria .15
9.7 Disconnecting force test .16
9.7.1 Apparatus .16
9.7.2 Procedure .16
9.7.3 Pass/fail criteria .16
9.8 Leakage test (to be performed before disconnecting) .16
9.8.1 Description . . .16
9.8.2 Apparatus .16
9.8.3 Procedure .17
9.8.4 Pass/fail criteria .19
9.9 Cyclic endurance (impulse) test with vibration (for PA tubing only) .19
9.9.1 Description . . .19
9.9.2 Apparatus .19
9.9.3 Procedure .19
9.9.4 Pass/fail criteria .21
10 Designation .21
11 Identification statement (reference to this document) .23
Annex A (normative) PA tubes for testing .24
Annex B (normative) PU tubes for testing .27
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SIST ISO 14743:2021
ISO 14743:2020(E)
Bibliography .30
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SIST ISO 14743:2021
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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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee
SC 4, Connectors and similar products and components.
This second edition cancels and replaces the first edition (ISO 14743:2004), which has been technically
revised. The main changes compared to the previous edition are as follows:
— new fitting size including inch dimensions has been added;
— new normative references have been added;
— updates on leakages performances and precisions have been added for cyclic endurance with
vibration.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
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SIST ISO 14743:2021
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Introduction
In pneumatic fluid power systems, power is transmitted and controlled through air under pressure
within a circuit.
Components are connected through their ports by means of connectors (fittings) and conductors.
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SIST ISO 14743:2021
INTERNATIONAL STANDARD ISO 14743:2020(E)
Pneumatic fluid power — Push-in connectors for
thermoplastic tubes
1 Scope
This document specifies the general requirements and test methods for the design and performance of
push-in connectors for use with thermoplastic tubes with outside diameters (OD) from 3 mm to 16 mm
including dimensions in inches.
This document is intended to establish uniform methods of testing complete push-in connector
assemblies as used in pneumatic fluid power applications. It is not applicable to air braking systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 4759-1, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B and C
ISO 5598, Fluid power systems and components — Vocabulary
ISO 8573-1:2010, Compressed air — Part 1: Contaminants and purity classes
ISO 10619-1, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 1:
Bending tests at ambient temperature
ISO 16030, Pneumatic fluid power — Connections — Ports and stud ends
ANSI/ASME B1.1, Unified Inch Screw Threads, (UN and UNR Thread Form)
ANSI/ASME B1.20.1, Pipe Threads, General Purpose, Inch
ANSI/ASME B1.20.3, Dryseal Pipe Threads (Inch)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5598 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
4 Working conditions
1)
Push-in connectors shall provide connections from –0,09 MPa [–0,9 bar ] to a working pressure of
1,6 MPa (16 bar) when used at temperatures between –20 °C and +80 °C.
2
1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm
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SIST ISO 14743:2021
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The connector assembly shall meet the performance requirements given in Clause 9 with tubes
specified in Annex A and Annex B.
When tubing with a lower rated pressure is used, the maximum working pressure of the tube and
connector assembly shall be that of the tubing.
In road vehicles, it is necessary to exercise special care to ensure that these connectors are never used
in an air braking system.
5 Features
Design is optional to the manufacturer. Two examples are shown in Figure 1.
a) With sealing system b) With sealing system
located beyond the locking mechanism located in front of the locking mechanism
Key
1 body 5 releasing sleeve
2 tube stop 6 removable button (optional)
3 grab ring of tube 7 tube
a
4 sealing of tube Entry of the tube.
Figure 1 — Examples of design and description of the features of push-in connectors for use
with thermoplastic tubes
6 OD of tube
The OD of the tube shall be chosen from the following range of sizes:
3 mm, 1/8 in (3,17 mm), 4 mm (5/32 in), 6 mm, 1/4 in (6,35 mm), 8 mm (5/16 in), 10 mm, 3/8 in
(9,52 mm), 12 mm, 1/2 in (12,7 mm), 14 mm, and 16 mm (5/8 in).
7 Design
7.1 Push-in connector dimensions shown in Figures 2 to 7 shall conform to the dimensions given in
Tables 1 to 7.
7.2 Hexagon tolerances across flats shall be in accordance with ISO 4759-1, Grade C. The minimum
hexagon across-corner turn diameter of 1,092 times the normal across flats dimension shall be used.
7.3 For connectors with the thread M and G, thread and stud end shall be in accordance with ISO 16030.
For connector with the thread R, thread and stud end shall be in accordance with ISO 7-1.
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For connector with NPT thread, thread and stud end shall be in accordance with ANSI/ASME B1.20.1
and ANSI/ASME B1.20.3.
For connector with UNF thread, thread and stud end shall be in accordance with ANSI/ASME B1.1.
7.4 Details of contour shall be at the option of the manufacturer if the dimensions given in the Tables
are maintained.
Key
D tube OD L maximum insertion depth
Figure 2 — Tube insertion depth
Table 1 — Maximum tube insertion depth
Tube OD Maximum insertion depth
D L
in (mm) mm mm
1/8 (3,17) 3 16
5/32 (4) 4 18
1/4 (6,35) 6 19
5/16 (8) 8 20
3/8 (9,52) 10 24
12 33
1/2 (12,7)
14 33
5/8 (16) 16 35
Key
D tube OD L Stud adaptor height
1
d thread outside diameter d flow diameter
1 f
s hexagon socket dimension
Figure 3 — Stud adaptor (SDS)
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SIST ISO 14743:2021
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Table 2 — SDS dimensions for tube OD in millimetres
Dimensions in millimetres
Tube OD Flow diameter
a
D d L s d
1 1 f
max. max. min.
M3 17 10 1,2
3
M5 17 10 1,8
M3 22 12 1,2
M5 22 12 2
M7 22 12 2,5
4
G1/8, R1/8, 1/8NPT 22 14 2,5
G1/4, R1/4, 1/4NPT 22 19 2,5
R3/8 22 22 3
M5 23 12 2,5
M7 23 14 3
M10 23 15 4
M12 23 17 4
6
G1/8, R1/8, 1/8NPT 23 14 4
G1/4, R1/4, 1/4NPT 23 19 4
G3/8, R3/8 23 22 4
G1/2, R1/2 23 26 4
M10, M12, G1/8, R1/8, 1/8NPT 24 17 5
G1/4, R1/4, 1/4NPT 24 19 6
8
G3/8, R3/8, 3/8NPT 24 22 6
G1/2, R1/2 24 26 6
G1/4 27 19 7
G3/8, R3/8, 3/8NPT 27 22 8
G1/2 27 26 8
10
R1/8 27 19 5
R1/4, 1/4NPT 27 22 7
R1/2, 1/2NPT 27 26 8
G1/4, R1/4 30 22 7
G3/8, R3/8, 3/8NPT 30 22 9
12
G1/2, 1/2NPT 30 26 10
R 1/2 30 26 9
G3/8, R3/8 32 25 9
14 G1/2 32 26 11
R 1/2 32 26 10
G3/8, R3/8, 3/8NPT 34 30 9
16
G1/2, R1/2, 1/2NPT 34 30 12
a
Hexagon socket or OD at the choice of the manufacturer.
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SIST ISO 14743:2021
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Table 3 — SDS dimensions for tube OD in inches
Tube OD Flow diameter
a
D d L s d
1 1 f
in mm mm mm mm
max. max. min.
R1/8, 1/16NPT, 1/8NPT 18 14 1,8
1/8 1/4 NPT 18 19 1,8
10-32 UNF 18 13 1,8
R1/8, 1/8NPT 22 14 2,5
5/32 R1/4, 1/4NPT 22 20 2,5
10-32 UNF 22 13 2
R1/8, 1/8NPT 23 15 4
R1/4, 1/4NPT 23 19 4
1/16 NPT 23 14 3
1/4 3/8 NPT 23 22 4
10-32 UNF 23 14 2
M5 23 12 2,5
M7 23 14 4
R1/8, 1/8NPT 25 17 5
R1/4, 1/4NPT 25 19 6
5/16
R3/8, 3/8NPT 25 22 6
R 1/2 25 26 6
R1/4, 1/4NPT 28 19 7
R3/8, 3/8NPT 28 22 7
3/8
R1/2, 1/2NPT 28 26 7
1/8 NPT 28 19 4
R1/4, 1/4NPT 30 26 6
1/2
R3/8, R1/2, 3/8NPT, 1/2NPT 30 26 7
G3/8, R3/8, 3/8NPT 34 30 9
5/8
G1/2, R1/2, 1/2NPT 34 30 12
a
Hexagon socket or OD at the choice of the manufacturer.
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SIST ISO 14743:2021
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Key
D tube OD L elbow and tee (branch or swivel) outer length
2
dimension (from thread axis to perpendicular side
connector end)
d flow diameter L elbow and tee (branch or swivel) outer length
f 3
dimension (from thread stop end surface to
perpendicular side connector tubing axis)
d thread outside diameter d connector body outer diameter
1 2
Figure 4 — Swivel male run tee (SWRT)
Key
D tube OD L elbow and tee (branch or swivel) outer length
2
dimension (from thread axis to perpendicular side
connector end)
d flow diameter L elbow and tee (branch or swivel) outer length
f 3
dimension (from thread stop end surface to
perpendicular side connector tubing axis)
d thread outside diameter d connector body outer diameter
1 2
Figure 5 — Swivel male branch tee (SWBT)
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Key
D tube OD L elbow and tee (branch or swivel) outer length
2
dimension (from thread axis to perpendicular side
connector end)
d flow diameter L elbow and tee (branch or swivel) outer length
f 3
dimension (from thread stop end surface to
perpendicular side connector tubing axis)
d thread outside diameter d connector body outer diameter
1 2
Figure 6 — Swivel male elbow (SWE)
Table 4 — Dimensions for SWRTs, SWBTs and SWEs for tube OD in millimetres
Dimensions in millimetres
Flow
Tube OD
diameter
a
D d d L L s d
1 2 2 3 f
max. max. max. max. min.
M3 10 19 16 6 1,2
3
M5 10 19 18 10 1,8
M3 10 19 21 12 1,2
M5 13 21 21 10 2
M7 13 21 21 12 2,5
4
G1/8, R1/8, 1/8NPT 13 21 21 14 2,5
G1/4, R1/4, 1/4NPT 13 21 21 19 2,5
R 3/8 13 21 21 22 3
M5 13 23 26 12 2,5
M7 15 23 26 14 2,5
M10 15 23 26 15 4
M12 15 23 26 17 4
6
G1/8, R1/8, 1/8NPT 15 23 26 14 4
G1/4, R1/4, 1/4NPT 15 23 26 19 4
G3/8, R3/8 15 23 26 22 4
G1/2, R1/2 15 23 26 26 4
a
Hexagon socket or OD at the choice of the manufacturer.
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SIST ISO 14743:2021
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Table 4 (continued)
Flow
Tube OD
diameter
a
D d d L L s d
1 2 2 3 f
max. max. max. max. min.
M10, M12 17 26 28 17 5
M12 17 26 28 17 5
G1/8, R1/8, 1/8NPT 17 26 28 14 5
8
G1/4, R1/4, 1/4NPT 17 26 28 19 6
G3/8, R3/8, 3/8NPT 17 26 28 22 6
G1/2, R1/2 17 26 28 26 6
G1/4, R1/4, 1/4NPT 22 29 34 19 7
G3/8, R3/8, 3/8NPT, G1/2 22 29 34 22 8
10
R 1/8 22 29 34 26 5
R1/2, 1/2NPT 22 29 34 26 8
G1/4, R1/4 24 32 37 22 7
12 G3/8, R3/8, 3/8NPT 24 32 37 22 9
G1/2, R1/2, 1/2NPT 24 32 37 26 9
G3/8, R3/8 26 37 42 25 9
14
G1/2, R1/2 26 37 42 26 11
G3/8, R3/8, 3/8NPT 29 41 75 30 9
16
G1/2, R1/2, 1/2NPT 29 41 75 30 12
a
Hexagon socket or OD at the choice of the manufacturer.
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SIST ISO 14743:2021
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Table 5 — Dimensions for SWRTs, SWBTs and SWEs for tube OD in inches
Flow
Tube OD
diameter
a
D d d L L s d
1 2 2 3 f
in mm mm mm mm mm mm
max. max. max. max. min.
R1/8, 1/16NPT, 1/8NPT 10 19 21 14 1,8
1/8 10-32UNF 10 19 21 13 1,8
1/4NPT 10 19 21 19 1,8
R1/8, 1/8NPT 13 21 23 14 3
5/32 R1/4, 1/4NPT 13 21 23 19 3
10-32 UNF 13 21 23 13 2
R1/8 15 23 26 14 4
R1/4 15 23 26 19 4
10-32 UNF 15 23 26 14 2
1/4 1/8 NPT 15 23 26 14 4
1/4 NPT 15 23 26 19 4
3/8 NPT 15 23 26 22 4
M7 15 23 26 14 4
R1/8, 1/8NPT 17 26 28 17 4
R1/4, 1/4NPT 17 26 28 19 6
5/16
R3/8, 3/8NPT 17 26 28 22 6
R1/2 17 26 28 26 7
R1/4, 1/4NPT 22 29 34 19 7
R3/8, 3/8NPT 22 29 34 22 7
3/8
1/8NPT 22 29 34 19 4
1/2NPT 22 29 34 26 7
R1/4, 1/4NPT 24 37 37 22 7
1/2 R3/8, 3/8NPT 24 37 37 22 9
R1/2, 1/2NPT 24 37 37 26 9,6
G3/8, R3/8, 3/8NPT 29 41 75 30 9
5/8
G1/2, R1/2, 1/2NPT 29 41 75 30 12
a
Hexagon socket OD the manufacturer.
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SIST ISO 14743:2021
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Key
D tube OD L male banjo elbow length outer dimension (from
4
thread axis to perpendicular side connector end)
d flow diameter L male banjo elbow length outer dimension (from
f 5
thread stop end surface to perpendicular side
connector tubing axis)
d thread outside diameter L male banjo elbow height (from thread stop end
1 6
surface)
s hexagon socket dimension L male banjo elbow half width
7
Figure 7 — Male banjo elbow (BJE) connectors
Table 6 — Dimensions for BJE connectors for tube OD in millimetres
Dimensions in millimetres
Flow
Tube OD
diameter
a
D d L L L L s d
1 4 5 6 7 f
max. max. max. max. max. min.
M3 20 10 22 5 6 1,2
3
M5 20 10 25 8 10 1,8
M5 24 10 25 8 10 2
4 M7 24 12 26 9 12 2,5
G1/8, R1/8 24 12 26 9 14 3
M5, M7, G1/8 24 12 26 9 14 4
6 G1/4, R1/4 24 12 26 11 19 4
R1/8 24 12 26 9 14 2,5
G1/8, R1/8 26 14 29 11 14 5,5
8 G1/4, R1/4 32 14 32 11 19 6
G3/8, R3/8 32 14 32 13 23 6
a
Hexagon socket or OD at the choice of the manufacturer.
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Table 6 (continued)
Flow
Tube OD
diameter
a
D d L L L L s d
1 4 5 6 7 f
max. max. max. max. max. min.
G1/4, R1/4 39 14 34 13 23 7,5
10 G3/8, R3/8 39 16 39 13 23 8
G1/2 39 16 39 15 27 8
G3/8, R3/8 44 16 39 15 23 10
12 G1/2, R1/2 44 16 42 17 27 10
R1/4 44 16 39 15 23 7
a
Hexagon socket or OD at the choice of the manufacturer.
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SIST ISO 14743:2021
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Table 7 — Dimensions for BJE connectors for tube OD in inches
Flow
Tube OD
diameter
a
D d L L L L s d
1 4 5 6 7 f
in mm mm mm mm mm mm mm
max. max. max. max. max. min.
1/8 10-32UNF 20 10 22 8 10 1,8
1/8NPT 24 12 26 9 14 3
5/32
10-32UNF 24 10 25 8 12 2
1/8 NPT 26 14 26 9 14 4
1/4 NPT 26 14 27 9 19 4
1/4
3/8 NPT 32 14 29 11 23 4
10-32UNF 26 14 26 9 12 2
1/8 NPT 29 14 29 11 14 5,5
5/16
1/4 NPT 32 14 32 11 19 6
1/4 NPT 39 16 34 13 23 7
3/8
3/8 NPT 39 16 39 13 23 7
a
Hexagon socket or OD at the choice of the manufacturer.
8 Marking
Each push-in connector shall be permanently marked with the minimum following information:
a) manufacturer's/supplier's name or trademark;
b) the OD of the tube which it is to be used with the push-in connector.
9 Performance requirements and testing
9.1 General
9.1.1 This clause establishes minimum qualification requirements for tensile load, pressure capabilities,
leakage, connection forces, disconnection forces and cyclic endurance (impulse) for pneumatic push-in
connectors for use with thermoplastic tubes.
9.1.2 Unless otherwise specified, tests shall be conducted at room temperature (23 °C ± 5 °C) and
relative humidity level of 65 % ± 5 %.
9.1.3 Unless otherwise specified, a tolerance of ±5 % applies to all test characteristics.
9.2 Test samples
9.2.1 Three test samples shall be subjected to the proof and burst pressure tests; six test samples shall
be subjected to all other tests.
9.2.2 Prior to testing, the tube sample shall be a minimum of two weeks (336 h) old.
9.2.3 Test samples shall consist of a push-in connector connected to the test tubing defined in Annex A
and Annex B. Except for 9.6 and 9.7, the tubes for the test samples shall be cut to provide a length that is
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SIST ISO 14743:2021
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20 times the OD of the tube between the two ends of the connectors when connected. The tubes shall be
connected in accordance with the connector manufacturer’s specification.
9.2.4 Prior to testing, each connector to be tested shall be connected and disconnected four times and
then connected a fifth time so that testing can be conducted.
9.3 Tensile test
9.3.1 Procedure
9.3.1.1 The test shall be conducted under unpressurised conditions.
9.3.1.2 The test sample shall be placed in a tensile machine and fixture so that the samples and end
fixtures are co-linear. One end of the test sample shall be stationary, and the opposite end shall be
attached to the moving member of the test apparatus. A tensile load shall be applied at a rate of 1 mm/s
along the axis of the test specimen.
9.3.2 Pass/fail criteria
The test sample shall withstand the minimum tensile load shown in Table 8 without separation from
the connector.
Table 8 — Minimum tensile load for tensile test
Tube OD, D, mm 3 4 6 8 1
...
INTERNATIONAL ISO
STANDARD 14743
Second edition
2020-01
Pneumatic fluid power — Push-in
connectors for thermoplastic tubes
Transmissions pneumatiques — Raccords instantanés pour tubes
thermoplastiques
Reference number
ISO 14743:2020(E)
©
ISO 2020
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ISO 14743:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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ISO 14743:2020(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Working conditions . 1
5 Features . 2
6 OD of tube . 2
7 Design . 2
8 Marking .12
9 Performance requirements and testing .12
9.1 General .12
9.2 Test samples .12
9.3 Tensile test .13
9.3.1 Procedure .13
9.3.2 Pass/fail criteria .13
9.4 Pressure at maximum temperature test (for PA tubing only) .13
9.4.1 Description . . .13
9.4.2 Apparatus .13
9.4.3 Procedure .14
9.4.4 Pass/fail criteria .14
9.5 Proof and burst pressure test (for PA tubing only) .14
9.5.1 Description . . .14
9.5.2 Apparatus .14
9.5.3 Procedure .14
9.5.4 Pass/fail criteria .15
9.6 Connecting force test .15
9.6.1 Apparatus .15
9.6.2 Procedure .15
9.6.3 Pass/fail criteria .15
9.7 Disconnecting force test .16
9.7.1 Apparatus .16
9.7.2 Procedure .16
9.7.3 Pass/fail criteria .16
9.8 Leakage test (to be performed before disconnecting) .16
9.8.1 Description . . .16
9.8.2 Apparatus .16
9.8.3 Procedure .17
9.8.4 Pass/fail criteria .19
9.9 Cyclic endurance (impulse) test with vibration (for PA tubing only) .19
9.9.1 Description . . .19
9.9.2 Apparatus .19
9.9.3 Procedure .19
9.9.4 Pass/fail criteria .21
10 Designation .21
11 Identification statement (reference to this document) .23
Annex A (normative) PA tubes for testing .24
Annex B (normative) PU tubes for testing .27
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ISO 14743:2020(E)
Bibliography .30
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ISO 14743:2020(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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee
SC 4, Connectors and similar products and components.
This second edition cancels and replaces the first edition (ISO 14743:2004), which has been technically
revised. The main changes compared to the previous edition are as follows:
— new fitting size including inch dimensions has been added;
— new normative references have been added;
— updates on leakages performances and precisions have been added for cyclic endurance with
vibration.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
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ISO 14743:2020(E)
Introduction
In pneumatic fluid power systems, power is transmitted and controlled through air under pressure
within a circuit.
Components are connected through their ports by means of connectors (fittings) and conductors.
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INTERNATIONAL STANDARD ISO 14743:2020(E)
Pneumatic fluid power — Push-in connectors for
thermoplastic tubes
1 Scope
This document specifies the general requirements and test methods for the design and performance of
push-in connectors for use with thermoplastic tubes with outside diameters (OD) from 3 mm to 16 mm
including dimensions in inches.
This document is intended to establish uniform methods of testing complete push-in connector
assemblies as used in pneumatic fluid power applications. It is not applicable to air braking systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 4759-1, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B and C
ISO 5598, Fluid power systems and components — Vocabulary
ISO 8573-1:2010, Compressed air — Part 1: Contaminants and purity classes
ISO 10619-1, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 1:
Bending tests at ambient temperature
ISO 16030, Pneumatic fluid power — Connections — Ports and stud ends
ANSI/ASME B1.1, Unified Inch Screw Threads, (UN and UNR Thread Form)
ANSI/ASME B1.20.1, Pipe Threads, General Purpose, Inch
ANSI/ASME B1.20.3, Dryseal Pipe Threads (Inch)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5598 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
4 Working conditions
1)
Push-in connectors shall provide connections from –0,09 MPa [–0,9 bar ] to a working pressure of
1,6 MPa (16 bar) when used at temperatures between –20 °C and +80 °C.
2
1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm
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ISO 14743:2020(E)
The connector assembly shall meet the performance requirements given in Clause 9 with tubes
specified in Annex A and Annex B.
When tubing with a lower rated pressure is used, the maximum working pressure of the tube and
connector assembly shall be that of the tubing.
In road vehicles, it is necessary to exercise special care to ensure that these connectors are never used
in an air braking system.
5 Features
Design is optional to the manufacturer. Two examples are shown in Figure 1.
a) With sealing system b) With sealing system
located beyond the locking mechanism located in front of the locking mechanism
Key
1 body 5 releasing sleeve
2 tube stop 6 removable button (optional)
3 grab ring of tube 7 tube
a
4 sealing of tube Entry of the tube.
Figure 1 — Examples of design and description of the features of push-in connectors for use
with thermoplastic tubes
6 OD of tube
The OD of the tube shall be chosen from the following range of sizes:
3 mm, 1/8 in (3,17 mm), 4 mm (5/32 in), 6 mm, 1/4 in (6,35 mm), 8 mm (5/16 in), 10 mm, 3/8 in
(9,52 mm), 12 mm, 1/2 in (12,7 mm), 14 mm, and 16 mm (5/8 in).
7 Design
7.1 Push-in connector dimensions shown in Figures 2 to 7 shall conform to the dimensions given in
Tables 1 to 7.
7.2 Hexagon tolerances across flats shall be in accordance with ISO 4759-1, Grade C. The minimum
hexagon across-corner turn diameter of 1,092 times the normal across flats dimension shall be used.
7.3 For connectors with the thread M and G, thread and stud end shall be in accordance with ISO 16030.
For connector with the thread R, thread and stud end shall be in accordance with ISO 7-1.
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ISO 14743:2020(E)
For connector with NPT thread, thread and stud end shall be in accordance with ANSI/ASME B1.20.1
and ANSI/ASME B1.20.3.
For connector with UNF thread, thread and stud end shall be in accordance with ANSI/ASME B1.1.
7.4 Details of contour shall be at the option of the manufacturer if the dimensions given in the Tables
are maintained.
Key
D tube OD L maximum insertion depth
Figure 2 — Tube insertion depth
Table 1 — Maximum tube insertion depth
Tube OD Maximum insertion depth
D L
in (mm) mm mm
1/8 (3,17) 3 16
5/32 (4) 4 18
1/4 (6,35) 6 19
5/16 (8) 8 20
3/8 (9,52) 10 24
12 33
1/2 (12,7)
14 33
5/8 (16) 16 35
Key
D tube OD L Stud adaptor height
1
d thread outside diameter d flow diameter
1 f
s hexagon socket dimension
Figure 3 — Stud adaptor (SDS)
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ISO 14743:2020(E)
Table 2 — SDS dimensions for tube OD in millimetres
Dimensions in millimetres
Tube OD Flow diameter
a
D d L s d
1 1 f
max. max. min.
M3 17 10 1,2
3
M5 17 10 1,8
M3 22 12 1,2
M5 22 12 2
M7 22 12 2,5
4
G1/8, R1/8, 1/8NPT 22 14 2,5
G1/4, R1/4, 1/4NPT 22 19 2,5
R3/8 22 22 3
M5 23 12 2,5
M7 23 14 3
M10 23 15 4
M12 23 17 4
6
G1/8, R1/8, 1/8NPT 23 14 4
G1/4, R1/4, 1/4NPT 23 19 4
G3/8, R3/8 23 22 4
G1/2, R1/2 23 26 4
M10, M12, G1/8, R1/8, 1/8NPT 24 17 5
G1/4, R1/4, 1/4NPT 24 19 6
8
G3/8, R3/8, 3/8NPT 24 22 6
G1/2, R1/2 24 26 6
G1/4 27 19 7
G3/8, R3/8, 3/8NPT 27 22 8
G1/2 27 26 8
10
R1/8 27 19 5
R1/4, 1/4NPT 27 22 7
R1/2, 1/2NPT 27 26 8
G1/4, R1/4 30 22 7
G3/8, R3/8, 3/8NPT 30 22 9
12
G1/2, 1/2NPT 30 26 10
R 1/2 30 26 9
G3/8, R3/8 32 25 9
14 G1/2 32 26 11
R 1/2 32 26 10
G3/8, R3/8, 3/8NPT 34 30 9
16
G1/2, R1/2, 1/2NPT 34 30 12
a
Hexagon socket or OD at the choice of the manufacturer.
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ISO 14743:2020(E)
Table 3 — SDS dimensions for tube OD in inches
Tube OD Flow diameter
a
D d L s d
1 1 f
in mm mm mm mm
max. max. min.
R1/8, 1/16NPT, 1/8NPT 18 14 1,8
1/8 1/4 NPT 18 19 1,8
10-32 UNF 18 13 1,8
R1/8, 1/8NPT 22 14 2,5
5/32 R1/4, 1/4NPT 22 20 2,5
10-32 UNF 22 13 2
R1/8, 1/8NPT 23 15 4
R1/4, 1/4NPT 23 19 4
1/16 NPT 23 14 3
1/4 3/8 NPT 23 22 4
10-32 UNF 23 14 2
M5 23 12 2,5
M7 23 14 4
R1/8, 1/8NPT 25 17 5
R1/4, 1/4NPT 25 19 6
5/16
R3/8, 3/8NPT 25 22 6
R 1/2 25 26 6
R1/4, 1/4NPT 28 19 7
R3/8, 3/8NPT 28 22 7
3/8
R1/2, 1/2NPT 28 26 7
1/8 NPT 28 19 4
R1/4, 1/4NPT 30 26 6
1/2
R3/8, R1/2, 3/8NPT, 1/2NPT 30 26 7
G3/8, R3/8, 3/8NPT 34 30 9
5/8
G1/2, R1/2, 1/2NPT 34 30 12
a
Hexagon socket or OD at the choice of the manufacturer.
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ISO 14743:2020(E)
Key
D tube OD L elbow and tee (branch or swivel) outer length
2
dimension (from thread axis to perpendicular side
connector end)
d flow diameter L elbow and tee (branch or swivel) outer length
f 3
dimension (from thread stop end surface to
perpendicular side connector tubing axis)
d thread outside diameter d connector body outer diameter
1 2
Figure 4 — Swivel male run tee (SWRT)
Key
D tube OD L elbow and tee (branch or swivel) outer length
2
dimension (from thread axis to perpendicular side
connector end)
d flow diameter L elbow and tee (branch or swivel) outer length
f 3
dimension (from thread stop end surface to
perpendicular side connector tubing axis)
d thread outside diameter d connector body outer diameter
1 2
Figure 5 — Swivel male branch tee (SWBT)
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ISO 14743:2020(E)
Key
D tube OD L elbow and tee (branch or swivel) outer length
2
dimension (from thread axis to perpendicular side
connector end)
d flow diameter L elbow and tee (branch or swivel) outer length
f 3
dimension (from thread stop end surface to
perpendicular side connector tubing axis)
d thread outside diameter d connector body outer diameter
1 2
Figure 6 — Swivel male elbow (SWE)
Table 4 — Dimensions for SWRTs, SWBTs and SWEs for tube OD in millimetres
Dimensions in millimetres
Flow
Tube OD
diameter
a
D d d L L s d
1 2 2 3 f
max. max. max. max. min.
M3 10 19 16 6 1,2
3
M5 10 19 18 10 1,8
M3 10 19 21 12 1,2
M5 13 21 21 10 2
M7 13 21 21 12 2,5
4
G1/8, R1/8, 1/8NPT 13 21 21 14 2,5
G1/4, R1/4, 1/4NPT 13 21 21 19 2,5
R 3/8 13 21 21 22 3
M5 13 23 26 12 2,5
M7 15 23 26 14 2,5
M10 15 23 26 15 4
M12 15 23 26 17 4
6
G1/8, R1/8, 1/8NPT 15 23 26 14 4
G1/4, R1/4, 1/4NPT 15 23 26 19 4
G3/8, R3/8 15 23 26 22 4
G1/2, R1/2 15 23 26 26 4
a
Hexagon socket or OD at the choice of the manufacturer.
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ISO 14743:2020(E)
Table 4 (continued)
Flow
Tube OD
diameter
a
D d d L L s d
1 2 2 3 f
max. max. max. max. min.
M10, M12 17 26 28 17 5
M12 17 26 28 17 5
G1/8, R1/8, 1/8NPT 17 26 28 14 5
8
G1/4, R1/4, 1/4NPT 17 26 28 19 6
G3/8, R3/8, 3/8NPT 17 26 28 22 6
G1/2, R1/2 17 26 28 26 6
G1/4, R1/4, 1/4NPT 22 29 34 19 7
G3/8, R3/8, 3/8NPT, G1/2 22 29 34 22 8
10
R 1/8 22 29 34 26 5
R1/2, 1/2NPT 22 29 34 26 8
G1/4, R1/4 24 32 37 22 7
12 G3/8, R3/8, 3/8NPT 24 32 37 22 9
G1/2, R1/2, 1/2NPT 24 32 37 26 9
G3/8, R3/8 26 37 42 25 9
14
G1/2, R1/2 26 37 42 26 11
G3/8, R3/8, 3/8NPT 29 41 75 30 9
16
G1/2, R1/2, 1/2NPT 29 41 75 30 12
a
Hexagon socket or OD at the choice of the manufacturer.
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ISO 14743:2020(E)
Table 5 — Dimensions for SWRTs, SWBTs and SWEs for tube OD in inches
Flow
Tube OD
diameter
a
D d d L L s d
1 2 2 3 f
in mm mm mm mm mm mm
max. max. max. max. min.
R1/8, 1/16NPT, 1/8NPT 10 19 21 14 1,8
1/8 10-32UNF 10 19 21 13 1,8
1/4NPT 10 19 21 19 1,8
R1/8, 1/8NPT 13 21 23 14 3
5/32 R1/4, 1/4NPT 13 21 23 19 3
10-32 UNF 13 21 23 13 2
R1/8 15 23 26 14 4
R1/4 15 23 26 19 4
10-32 UNF 15 23 26 14 2
1/4 1/8 NPT 15 23 26 14 4
1/4 NPT 15 23 26 19 4
3/8 NPT 15 23 26 22 4
M7 15 23 26 14 4
R1/8, 1/8NPT 17 26 28 17 4
R1/4, 1/4NPT 17 26 28 19 6
5/16
R3/8, 3/8NPT 17 26 28 22 6
R1/2 17 26 28 26 7
R1/4, 1/4NPT 22 29 34 19 7
R3/8, 3/8NPT 22 29 34 22 7
3/8
1/8NPT 22 29 34 19 4
1/2NPT 22 29 34 26 7
R1/4, 1/4NPT 24 37 37 22 7
1/2 R3/8, 3/8NPT 24 37 37 22 9
R1/2, 1/2NPT 24 37 37 26 9,6
G3/8, R3/8, 3/8NPT 29 41 75 30 9
5/8
G1/2, R1/2, 1/2NPT 29 41 75 30 12
a
Hexagon socket OD the manufacturer.
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ISO 14743:2020(E)
Key
D tube OD L male banjo elbow length outer dimension (from
4
thread axis to perpendicular side connector end)
d flow diameter L male banjo elbow length outer dimension (from
f 5
thread stop end surface to perpendicular side
connector tubing axis)
d thread outside diameter L male banjo elbow height (from thread stop end
1 6
surface)
s hexagon socket dimension L male banjo elbow half width
7
Figure 7 — Male banjo elbow (BJE) connectors
Table 6 — Dimensions for BJE connectors for tube OD in millimetres
Dimensions in millimetres
Flow
Tube OD
diameter
a
D d L L L L s d
1 4 5 6 7 f
max. max. max. max. max. min.
M3 20 10 22 5 6 1,2
3
M5 20 10 25 8 10 1,8
M5 24 10 25 8 10 2
4 M7 24 12 26 9 12 2,5
G1/8, R1/8 24 12 26 9 14 3
M5, M7, G1/8 24 12 26 9 14 4
6 G1/4, R1/4 24 12 26 11 19 4
R1/8 24 12 26 9 14 2,5
G1/8, R1/8 26 14 29 11 14 5,5
8 G1/4, R1/4 32 14 32 11 19 6
G3/8, R3/8 32 14 32 13 23 6
a
Hexagon socket or OD at the choice of the manufacturer.
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ISO 14743:2020(E)
Table 6 (continued)
Flow
Tube OD
diameter
a
D d L L L L s d
1 4 5 6 7 f
max. max. max. max. max. min.
G1/4, R1/4 39 14 34 13 23 7,5
10 G3/8, R3/8 39 16 39 13 23 8
G1/2 39 16 39 15 27 8
G3/8, R3/8 44 16 39 15 23 10
12 G1/2, R1/2 44 16 42 17 27 10
R1/4 44 16 39 15 23 7
a
Hexagon socket or OD at the choice of the manufacturer.
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ISO 14743:2020(E)
Table 7 — Dimensions for BJE connectors for tube OD in inches
Flow
Tube OD
diameter
a
D d L L L L s d
1 4 5 6 7 f
in mm mm mm mm mm mm mm
max. max. max. max. max. min.
1/8 10-32UNF 20 10 22 8 10 1,8
1/8NPT 24 12 26 9 14 3
5/32
10-32UNF 24 10 25 8 12 2
1/8 NPT 26 14 26 9 14 4
1/4 NPT 26 14 27 9 19 4
1/4
3/8 NPT 32 14 29 11 23 4
10-32UNF 26 14 26 9 12 2
1/8 NPT 29 14 29 11 14 5,5
5/16
1/4 NPT 32 14 32 11 19 6
1/4 NPT 39 16 34 13 23 7
3/8
3/8 NPT 39 16 39 13 23 7
a
Hexagon socket or OD at the choice of the manufacturer.
8 Marking
Each push-in connector shall be permanently marked with the minimum following information:
a) manufacturer's/supplier's name or trademark;
b) the OD of the tube which it is to be used with the push-in connector.
9 Performance requirements and testing
9.1 General
9.1.1 This clause establishes minimum qualification requirements for tensile load, pressure capabilities,
leakage, connection forces, disconnection forces and cyclic endurance (impulse) for pneumatic push-in
connectors for use with thermoplastic tubes.
9.1.2 Unless otherwise specified, tests shall be conducted at room temperature (23 °C ± 5 °C) and
relative humidity level of 65 % ± 5 %.
9.1.3 Unless otherwise specified, a tolerance of ±5 % applies to all test characteristics.
9.2 Test samples
9.2.1 Three test samples shall be subjected to the proof and burst pressure tests; six test samples shall
be subjected to all other tests.
9.2.2 Prior to testing, the tube sample shall be a minimum of two weeks (336 h) old.
9.2.3 Test samples shall consist of a push-in connector connected to the test tubing defined in Annex A
and Annex B. Except for 9.6 and 9.7, the tubes for the test samples shall be cut to provide a length that is
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ISO 14743:2020(E)
20 times the OD of the tube between the two ends of the connectors when connected. The tubes shall be
connected in accordance with the connector manufacturer’s specification.
9.2.4 Prior to testing, each connector to be tested shall be connected and disconnected four times and
then connected a fifth time so that testing can be conducted.
9.3 Tensile test
9.3.1 Procedure
9.3.1.1 The test shall be conducted under unpressurised conditions.
9.3.1.2 The test sample shall be placed in a tensile machine and fixture so that the samples and end
fixtures are co-linear. One end of the test sample shall be stationary, and the opposite end shall be
attached to the moving member of the test apparatus. A tensile load shall be applied at a rate of 1 mm/s
along the axis of the test specimen.
9.3.2 Pass/fail criteria
The test sample shall withstand the minimum tensile load shown in Table 8 without separation from
the connector.
Table 8 — Minimum tensile load for tensile test
Tube OD, D, mm 3 4 6 8 10 12 14 16
Tube OD, D, in (mm) 1/8 5/32 1/4 5/16 3/8 1/2 – 5/8
(3,17) (4) (6,35) (8) (9,52) (12,7) (16)
Minimum tensile load for polyamide (PA) tube, N 60 70 120 170 250 300 300 350
Minimum tensile load for polyurethane (PU) 25 50 100 150 200 200 250 300
tube, N
9.4 Pressure at maximum temperature test (for PA tubing only)
9.4.1 Description
The test under 1,5 times maximum allowed working pressure (MAWP) at maximum temperature
is conducted with PA tubing, as specified in Annex A, and is intended to evaluate the ability of the
connector to be functional and disconnected after this test.
9.4.2 Apparatus
The test apparatus consists of a source of pressure and chamber temperature.
9.4.2.1 Source of pressure
The apparatus that will be used for the pressure test at maximum temperature shall be source of
pressure with gauges and piping, capable to apply to the sample 1,5 times MAWP within the ±5 %
general requirement tolerance. The test fluid applied shall be water.
9.4.2.2 Temperature chamber
The test apparatus consists of a temperature chamber capable
...
NORME ISO
INTERNATIONALE 14743
Deuxième édition
2020-01
Transmissions pneumatiques —
Raccords instantanés pour tubes
thermoplastiques
Pneumatic fluid power — Push-in connectors for thermoplastic tubes
Numéro de référence
ISO 14743:2020(F)
©
ISO 2020
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ISO 14743:2020(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2020
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Publié en Suisse
ii © ISO 2020 – Tous droits réservés
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ISO 14743:2020(F)
Sommaire Page
Avant-propos .v
Introduction .vi
1 Domaine d'application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Conditions de fonctionnement . 2
5 Technologies . 2
6 Diamètre extérieur du tube . 2
7 Conception . 2
8 Marquage .11
9 Exigences de performance et essai .12
9.1 Généralités .12
9.2 Échantillons d’essai .12
9.3 Essai de traction .12
9.3.1 Mode opératoire .12
9.3.2 Critères de réussite/défaillance .12
9.4 Essai de pression à température maximale (pour tube PA uniquement) .13
9.4.1 Description . . .13
9.4.2 Appareillage .13
9.4.3 Mode opératoire .13
9.4.4 Critères de réussite/défaillance .13
9.5 Essai de pression d'épreuve et de rupture (pour tube PA uniquement).13
9.5.1 Description . . .13
9.5.2 Appareillage .13
9.5.3 Mode opératoire .14
9.5.4 Critères de réussite/défaillance .14
9.6 Essai d’effort de connexion .14
9.6.1 Appareillage .14
9.6.2 Mode opératoire .14
9.6.3 Critères de réussite/défaillance .15
9.7 Essai d’effort de déconnexion .15
9.7.1 Appareillage .15
9.7.2 Mode opératoire .15
9.7.3 Critères de réussite/défaillance .15
9.8 Essai d’étanchéité (à réaliser avant déconnexion) .15
9.8.1 Description . . .15
9.8.2 Appareillage .15
9.8.3 Mode opératoire .16
9.8.4 Critères de réussite/défaillance .18
9.9 Essai cyclique d’endurance (impulsion) avec vibration (pour tubes PA uniquement) .18
9.9.1 Description . . .18
9.9.2 Appareillage .18
9.9.3 Mode opératoire .19
9.9.4 Critères de réussite/défaillance .20
10 Désignation .20
11 Phrase d’identification (référence au présent document) .22
Annexe A (normative) Tubes polyamide pour essai .23
Annexe B (normative) Tubes PU pour essai.26
© ISO 2020 – Tous droits réservés iii
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ISO 14743:2020(F)
Bibliographie .29
iv © ISO 2020 – Tous droits réservés
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ISO 14743:2020(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient en particulier de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a été
rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www
.iso .org/ directives).
L'attention est attirée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de
brevets reçues par l'ISO (voir www .iso .org/ brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir www .iso .org/ avant -propos.
Le présent document a été élaborée par le comité technique ISO/TC 131, Transmissions hydrauliques et
pneumatiques, sous-comité SC 4, Raccords, produits similaires et leurs composants.
Cette deuxième édition annule et remplace la première édition (ISO 14743:2004), dont elle constitue une
révision technique. Les principales modifications par rapport à l’édition précédente sont les suivantes:
— ajout de nouvelles dimensions de raccords en millimètres et inches;
— ajout de nouvelles références normatives;
— ajout de précisions et mise à jour des performances liées à l’étanchéité lors des essais cycliques
d’endurance avec vibration.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www .iso .org/ fr/ members .html.
© ISO 2020 – Tous droits réservés v
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ISO 14743:2020(F)
Introduction
Dans les systèmes de transmissions pneumatiques, l'énergie est transmise et commandée par
l'intermédiaire d’air sous pression circulant dans un circuit.
Les composants sont reliés entre eux au niveau de connecteurs (raccordements) et de conducteurs.
vi © ISO 2020 – Tous droits réservés
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NORME INTERNATIONALE ISO 14743:2020(F)
Transmissions pneumatiques — Raccords instantanés
pour tubes thermoplastiques
1 Domaine d'application
Le présent document spécifie les exigences générales et les méthodes d'essai pour la conception et les
performances des raccords instantanés destinés à être utilisés avec des tubes thermoplastiques de
diamètre extérieur (DE) compris entre 3 mm et 16 mm inclus.
Le présent document établit des méthodes d'essai uniformes de l'ensemble complet du raccord
instantané, tel qu'il est utilisé dans les applications de transmissions pneumatiques. Elle ne s'applique
pas aux systèmes de freinage à air.
2 Références normatives
Les documents de référence suivants sont indispensables pour l'application du présent document. Pour
les références datées, seule l'édition citée s'applique. Pour les références non datées, la dernière édition
du document de référence s'applique (y compris les éventuels amendements).
ISO 7-1, Filetages de tuyauterie pour raccordement avec étanchéité dans le filet — Partie 1: Dimensions,
tolérances et désignation
ISO 4759-1, Tolérances des éléments de fixation — Partie 1: Vis, goujons et écrous — Grades A, B et C
ISO 5598, Transmissions hydrauliques et pneumatiques — Vocabulaire
ISO 8573-1:2010, Air comprimé — Partie 1: Polluants et classes de pureté
ISO 10619-1, Tuyaux et tubes en caoutchouc et en plastique — Mesurage de la flexibilité et de la rigidité —
Partie 1: Essais de courbure à température ambiante
ISO 16030, Transmissions pneumatiques — Raccordements — Orifices et éléments mâles
ANSI/ASME B1.1, Unified Inch Screw Threads, (UN and UNR Thread Form)
ANSI/ASME B1.20.1, Pipe Threads, General Purpose, Inch
ANSI/ASME B1.20.3, Dryseal Pipe Threads (Inch)
3 Termes et définitions
Pour les besoins du présent document, les termes et définitions donnés dans l’ISO 5598 ainsi que les
suivants s'appliquent.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en
normalisation, consultables aux adresses suivantes:
— IEC Electropedia: disponible à l’adresse http:// www .electropedia .org/
— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp
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ISO 14743:2020(F)
4 Conditions de fonctionnement
1)
Les raccords instantanés doivent permettre des connexions de −0,09 MPa [-0,9 bar ] jusqu'à une
pression de service de 1,6 MPa (16 bar) lorsqu’ils sont utilisés à des températures comprises entre
−20 °C et +80 °C.
Le raccord complet doit satisfaire aux exigences de performance données dans l'Article 9 avec les tubes
spécifiés dans l’Annexe A et l’Annexe B.
Lorsque des tubes ayant une pression nominale plus faible sont utilisés, la pression de service maximale
du tube et de l'ensemble du raccordement doit être celle du tube.
Pour des véhicules routiers, il est nécessaire de prendre des précautions particulières pour s'assurer
que ces raccords ne sont jamais utilisés dans un système de freinage pneumatique à air.
5 Technologies
La conception est au choix du fabricant. Deux exemples sont donnés à la Figure 1.
a) Avec système d'étanchéité situé au-delà du b) Avec système d'étanchéité situé devant le
mécanisme de verrouillage mécanisme de verrouillage
Légende
1 corps 5 poussoir de déconnexion
2 butée du tube 6 bouton de déconnexion (en option)
3 bague de blocage du tube 7 tube
a
4 dispositif d’étanchéité du tube Entrée du tube.
Figure 1 — Exemples de la technologie des raccords instantanés pour usage avec tubes
thermoplastiques
6 Diamètre extérieur du tube
Le diamètre extérieur du tube doit être choisi parmi les dimensions suivantes:
3 mm, 1/8 in (3,17 mm), 4 mm (5/32 in), 6 mm, 1/4 in (6,35 mm), 8 mm (5/16 in), 10 mm, 3/8 in
(9,52 mm), 12 mm, 1/2 in (12,7 mm), 14 mm, et 16 mm (5/8 in).
7 Conception
7.1 Les dimensions du raccord instantané représentées aux Figures 2 à 7 doivent être conformes aux
dimensions données dans les Tableaux 1 à 7.
2
1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm .
2 © ISO 2020 – Tous droits réservés
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ISO 14743:2020(F)
7.2 Les tolérances sur les cotes surplats doivent être conformes à l'ISO 4759-1, Grade C. Le diamètre
minimal de tournage du six pans doit être de 1,092 fois la cote surplats.
7.3 Pour les raccords avec filetage M et G, filetage et élément mâle doivent être conformes à l'ISO 16030.
Pour les raccords avec filetage R, filetage et élément mâle doivent être conformes à l'ISO 7-1.
Pour les raccords avec filetage NPT, filetage et élément mâle doivent être conformes à l’ANSI/
ASME B1.20.1 et l’ANSI/ASME B1.20.3.
Pour les raccords avec filetage UNF, filetage et élément mâle doivent être conformes à l’ANSI/ASME B1.1.
7.4 Les détails du contour restent au choix du fabricant, du moment que les dimensions données dans
les tableaux sont respectées.
Légende
D diamètre extérieur du tube L profondeur maximale d’insertion
Figure 2 — Profondeur d'insertion du tube
Tableau 1 — Profondeur maximale d'insertion du tube
Diamètre extérieur du tube Profondeur d’insertion maximale
D L
in (mm) mm mm
1/8 (3,17) 3 16
5/32 (4) 4 18
1/4 (6,35) 6 19
5/16 (8) 8 20
3/8 (9,52) 10 24
12 33
1/2 (12,7)
14 33
5/8 (16) 16 35
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ISO 14743:2020(F)
Légende
D diamètre extérieur du tube L hauteur du piquage mâle
1
d diamètre extérieur du filetage d diamètre d’écoulement
1 f
s dimension du six pans
Figure 3 — Piquage mâle (SDS)
Tableau 2 — Dimensions des SDS pour un DE de tube en millimètres
Dimensions en millimètre
Diamètre
Diamètre
extérieur
d’écoulement
du tube
a
D d L s d
1 1 f
max. max. min.
M3 17 10 1,2
3
M5 17 10 1,8
M3 22 12 1,2
M5 22 12 2
M7 22 12 2,5
4
G1/8, R1/8, 1/8NPT 22 14 2,5
G1/4, R1/4, 1/4NPT 22 19 2,5
R3/8 22 22 3
M5 23 12 2,5
M7 23 14 3
M10 23 15 4
M12 23 17 4
6
G1/8, R1/8, 1/8NPT 23 14 4
G1/4, R1/4, 1/4NPT 23 19 4
G3/8, R3/8 23 22 4
G1/2, R1/2 23 26 4
M10, M12, G1/8, R1/8, 1/8NPT 24 17 5
G1/4, R1/4, 1/4NPT 24 19 6
8
G3/8, R3/8, 3/8NPT 24 22 6
G1/2, R1/2 24 26 6
a
Six pans ou DE au choix du fabricant.
4 © ISO 2020 – Tous droits réservés
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ISO 14743:2020(F)
Tableau 2 (suite)
Diamètre
Diamètre
extérieur
d’écoulement
du tube
a
D d L s d
1 1 f
max. max. min.
G1/4 27 19 7
G3/8, R3/8, 3/8NPT 27 22 8
G1/2 27 26 8
10
R1/8 27 19 5
R1/4, 1/4NPT 27 22 7
R1/2, 1/2NPT 27 26 8
G1/4, R1/4 30 22 7
G3/8, R3/8, 3/8NPT 30 22 9
12
G1/2, 1/2NPT 30 26 10
R 1/2 30 26 9
G3/8, R3/8 32 25 9
14 G1/2 32 26 11
R 1/2 32 26 10
G3/8, R3/8, 3/8NPT 34 30 9
16
G1/2, R1/2, 1/2NPT 34 30 12
a
Six pans ou DE au choix du fabricant.
Tableau 3 — Dimensions des SDS pour un DE de tube en inches
Diamètre
Diamètre
extérieur du
d’écoulement
tube
a
D d L s d
1 1 f
in mm mm mm mm
max. max. min.
R1/8, 1/16NPT, 1/8NPT 18 14 1,8
1/8 1/4 NPT 18 19 1,8
10-32 UNF 18 13 1,8
R1/8, 1/8NPT 22 14 2,5
5/32 R1/4, 1/4NPT 22 20 2,5
10-32 UNF 22 13 2
R1/8, 1/8NPT 23 15 4
R1/4, 1/4NPT 23 19 4
1/16 NPT 23 14 3
1/4 3/8 NPT 23 22 4
10-32 UNF 23 14 2
M5 23 12 2,5
M7 23 14 4
a
Six pans ou diamètre extérieur au choix du fabricant.
© ISO 2020 – Tous droits réservés 5
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ISO 14743:2020(F)
Tableau 3 (suite)
Diamètre
Diamètre
extérieur du
d’écoulement
tube
a
D d L s d
1 1 f
in mm mm mm mm
max. max. min.
R1/8, 1/8NPT 25 17 5
R1/4, 1/4NPT 25 19 6
5/16
R3/8, 3/8NPT 25 22 6
R 1/2 25 26 6
R1/4, 1/4NPT 28 19 7
R3/8, 3/8NPT 28 22 7
3/8
R1/2, 1/2NPT 28 26 7
1/8 NPT 28 19 4
R1/4, 1/4NPT 30 26 6
1/2
R3/8, R1/2, 3/8NPT, 1/2NPT 30 26 7
G3/8, R3/8, 3/8NPT 34 30 9
5/8
G1/2, R1/2, 1/2NPT 34 30 12
a
Six pans ou diamètre extérieur au choix du fabricant.
Légende
D diamètre extérieur du tube L dimension longueur extérieure (depuis l’axe du filetage
2
jusqu’au côté perpendiculaire de l’extrémité du raccord) du
coude et du Té (à piquage au centre ou orientable)
d diamètre d’écoulement L dimension de la longueur extérieure (depuis la surface
f 3
d’arrêt du filetage jusqu’au côté perpendiculaire de l’axe du
tube du raccord) du coude et du dé (à piquage au centre ou
orientable)
d diamètre extérieur du filetage d diamètre extérieur du corps du raccord
1 2
Figure 4 — Té à piquage en bout (SWRT)
6 © ISO 2020 – Tous droits réservés
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ISO 14743:2020(F)
Légende
D diamètre extérieur du tube L dimension longueur extérieure (depuis l’axe du filetage
2
jusqu’au côté perpendiculaire de l’extrémité du raccord) du
coude et du Té (à piquage au centre ou orientable)
d diamètre d’écoulement L longueur hors tout du coude et du Té (à piquage au centre ou
f 3
orientable) (de la surface de la butée du filetage à l’axe de la
tubulure de raccordement perpendiculaire)
d diamètre extérieur du filetage d diamètre extérieur du corps du raccord
1 2
Figure 5 — Té à piquage au centre (SWBT)
Key
D diamètre extérieur du tube L dimension longueur extérieure (depuis l’axe du filetage
2
jusqu’au côté perpendiculaire de l’extrémité du raccord) du
coude et du Té (à piquage au centre ou orientable)
d diamètre d’écoulement L longueur hors tout du coude et du Té (à piquage au centre ou
f 3
orientable) (de la surface de la butée du filetage à l’axe de la
tubulure de raccordement perpendiculaire)
d diamètre extérieur du filetage d diamètre extérieur du corps du raccord
1 2
Figure 6 — Coude mâle orientable (SWE)
© ISO 2020 – Tous droits réservés 7
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ISO 14743:2020(F)
Tableau 4 — Dimensions des SWRT, SWBT et SWE pour un DE de tube en millimètres
Dimensions en millimètres
Diamètre
Diamètre
extérieur du
d’écoulement
tube
a
D d d L L s d
1 2 2 3 f
max. max. max. max. min.
M3 10 19 16 6 1,2
3
M5 10 19 18 10 1,8
M3 10 19 21 12 1,2
M5 13 21 21 10 2
M7 13 21 21 12 2,5
4
G1/8, R1/8, 1/8NPT 13 21 21 14 2,5
G1/4, R1/4, 1/4NPT 13 21 21 19 2,5
R 3/8 13 21 21 22 3
M5 13 23 26 12 2,5
M7 15 23 26 14 2,5
M10 15 23 26 15 4
M12 15 23 26 17 4
6
G1/8, R1/8, 1/8NPT 15 23 26 14 4
G1/4, R1/4, 1/4NPT 15 23 26 19 4
G3/8, R3/8 15 23 26 22 4
G1/2, R1/2 15 23 26 26 4
M10, M12 17 26 28 17 5
M12 17 26 28 17 5
G1/8, R1/8, 1/8NPT 17 26 28 14 5
8
G1/4, R1/4, 1/4NPT 17 26 28 19 6
G3/8, R3/8, 3/8NPT 17 26 28 22 6
G1/2, R1/2 17 26 28 26 6
G1/4, R1/4, 1/4NPT 22 29 34 19 7
G3/8, R3/8, 3/8NPT, G1/2 22 29 34 22 8
10
R 1/8 22 29 34 26 5
R1/2, 1/2NPT 22 29 34 26 8
G1/4, R1/4 24 32 37 22 7
12 G3/8, R3/8, 3/8NPT 24 32 37 22 9
G1/2, R1/2, 1/2NPT 24 32 37 26 9
G3/8, R3/8 26 37 42 25 9
14
G1/2, R1/2 26 37 42 26 11
G3/8, R3/8, 3/8NPT 29 41 75 30 9
16
G1/2, R1/2, 1/2NPT 29 41 75 30 12
a
Six pans ou diamètre extérieur au choix du fabricant.
8 © ISO 2020 – Tous droits réservés
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ISO 14743:2020(F)
Tableau 5 — Dimensions des SWRT, SWBT et SWE pour un DE de tube en inches
Diamètre
Diamètre
extérieur du
d’écoulement
tube
a
D d d L L s d
1 2 2 3 f
in mm mm mm mm mm mm
max. max. max. max. min.
R1/8, 1/16NPT, 1/8NPT 10 19 21 14 1,8
1/8 10-32UNF 10 19 21 13 1,8
1/4NPT 10 19 21 19 1,8
R1/8, 1/8NPT 13 21 23 14 3
5/32 R1/4, 1/4NPT 13 21 23 19 3
10-32 UNF 13 21 23 13 2
R1/8 15 23 26 14 4
R1/4 15 23 26 19 4
10-32 UNF 15 23 26 14 2
1/4 1/8 NPT 15 23 26 14 4
1/4 NPT 15 23 26 19 4
3/8 NPT 15 23 26 22 4
M7 15 23 26 14 4
R1/8, 1/8NPT 17 26 28 17 4
R1/4, 1/4NPT 17 26 28 19 6
5/16
R3/8, 3/8NPT 17 26 28 22 6
R1/2 17 26 28 26 7
R1/4, 1/4NPT 22 29 34 19 7
R3/8, 3/8NPT 22 29 34 22 7
3/8
1/8NPT 22 29 34 19 4
1/2NPT 22 29 34 26 7
R1/4, 1/4NPT 24 37 37 22 7
1/2 R3/8, 3/8NPT 24 37 37 22 9
R1/2, 1/2NPT 24 37 37 26 9,6
G3/8, R3/8, 3/8NPT 29 41 75 30 9
5/8
G1/2, R1/2, 1/2NPT 29 41 75 30 12
a
Six pans ou diamètre extérieur au choix du fabricant.
© ISO 2020 – Tous droits réservés 9
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ISO 14743:2020(F)
Légende
D diamètre extérieur du tube L dimension longueur extérieur du banjo mâle à coude (de
4
la surface de la butée du filetage à l’axe de la tubulure de
raccordement perpendiculaire)
d diamètre d’écoulement L dimension longueur extérieur du banjo mâle à coude (de
f 5
la surface de la butée du filetage à l’axe de la tubulure de
raccordement)
d diamètre extérieur du filetage L hauteur du banjo mâle à coude (depuis la surface d’extrémité
1 6
du filetage)
s dimensions du six pans L demi-largeur du banjo mâle à coude
7
Figure 7 — Raccords banjo mâle à coude (BJE)
Tableau 6 — Dimensions des raccords (BJE) pour un DE de tube en millimètres
Dimensions en millimètres
Diamètre
Diamètre
extérieur
d’écoulement
du tube
a
D d L L L L s d
1 4 5 6 7 f
max. max. max. max. max. min.
M3 20 10 22 5 6 1,2
3
M5 20 10 25 8 10 1,8
M5 24 10 25 8 10 2
4 M7 24 12 26 9 12 2,5
G1/8, R1/8 24 12 26 9 14 3
M5, M7, G1/8 24 12 26 9 14 4
6 G1/4, R1/4 24 12 26 11 19 4
R1/8 24 12 26 9 14 2,5
G1/8, R1/8 26 14 29 11 14 5,5
8 G1/4, R1/4 32 14 32 11 19 6
G3/8, R3/8 32 14 32 13 23 6
a
Six pans ou DE au choix du fabricant.
10 © ISO 2020 – Tous droits réservés
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ISO 14743:2020(F)
Tableau 6 (suite)
Diamètre
Diamètre
extérieur
d’écoulement
du tube
a
D d L L L L s d
1 4 5 6 7 f
max. max. max. max. max. min.
G1/4, R1/4 39 14 34 13 23 7,5
10 G3/8, R3/8 39 16 39 13 23 8
G1/2 39 16 39 15 27 8
G3/8, R3/8 44 16 39 15 23 10
12 G1/2, R1/2 44 16 42 17 27 10
R1/4 44 16 39 15 23 7
a
Six pans ou DE au choix du fabricant.
Tableau 7 — Dimensions des raccords (BJE) pour un DE de tube en pouces
Diamètre d’écou-
DE de tube
lement
a
D d L L L L s d
1 4 5 6 7 f
in mm mm mm mm mm mm mm
max. max. max. max. max. min.
1/8 10-32UNF 20 10 22 8 10 1,8
1/8NPT 24 12 26 9 14 3
5/32
10-32UNF 24 10 25 8 12 2
1/8 NPT 26 14 26 9 14 4
1/4 NPT 26 14 27 9 19 4
1/4
3/8 NPT 32 14 29 11 23 4
10-32UNF 26 14 26 9 12 2
1/8 NPT 29 14 29 11 14 5,5
5/16
1/4 NPT 32 14 32 11 19 6
1/4 NPT 39 16 34 13 23 7
3/8
3/8 NPT 39 16 39 13 23 7
a
Six pans ou diamètre extérieur au choix du fabricant.
8 Marquage
Au minimum, chaque raccord instantané doit être marqué de manière indélébile avec les informations
suivantes:
a) nom du fabricant/fournisseur ou la marque de fabrique;
b) le diamètre extérieur du tube avec lequel il sera utilisé.
© ISO 2020 – Tous droits réservés 11
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ISO 14743:2020(F)
9 Exigences de performance et essai
9.1 Généralités
9.1.1 Cet article établit les exigences minimales de qualification pour la force d'arrachement de tube,
l'aptitude à la pression, l'étanchéité, les efforts de connexion, les efforts de déconnexion et l'endurance
cyclique (impulsion) pour les raccords instantanés pneumatiques pour utilisation avec tubes
thermoplastiques.
9.1.2 Sauf spécification contraire, les essais doivent être réalisés à température ambiante (23 °C ± 5 °C)
et à un niveau d'humidité relative de 65 % ± 5 %.
9.1.3 Sauf spécification contraire, une tolérance de ± 5 % s'applique à toutes les caractéristiques
d'essai.
9.2 Échantillons d’essai
9.2.1 Trois échantillons d’essai doivent être soumis aux essais d’épreuve et de rupture; six échantillons
d’essais doivent être soumis à tous les autres essais.
9.2.2 Avant tout essai, l’échantillon de tube doit avoir été stocké au moins deux semaines (336 h).
9.2.3 Les échantillons d’essai doivent être constitués d'un raccord instantané raccordé à un tube d’essai
décrit dans l’Annexe A et l’Annexe B. Sauf pour 9.6 et 9.7, les tubes des échantillons d'essai doivent être
coupés pour fournir une longueur égale à 20 fois le diamètre extérieur du tube entre les deux extrémités
du raccord lorsqu'il est raccordé. Les tubes doivent être connectés conformément aux spécifications du
fabricant de raccords.
9.
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