IEC 60684-3-246:2007

Flexible insulating sleeving - Part 3: Specifications for individual types of sleeving - Sheet 246: Heat-shrinkable polyolefin sleeving, dual wall, non-flame retarded

IEC 60684-3-246:2007 defines requirements for dual wall, non-flame retarded, heat shrinkable, polyolefin sleeving. This sleeving has been found suitable for use up to 110 °C. The sleeving consists of an outer layer made of a semi-rigid cross-linked material. The inner layer is a substantially non-cross-linked polyolefin that flows and fuses during the shrinkage process to provide a seal. The major technical changes with regard to the second edition concern a better alignment with existing national specifications.

Gaines isolantes souples - Partie 3: Spécifications pour types particuliers de gaines - Feuille 246: Gaines thermorétractables en polyoléfine, à double paroi, non retardées à la flamme

La CEI 60684-3-246:2007 définit les exigences relatives aux gaines thermorétractables en polyoléfine, double paroi, non retardées à la flamme. Il a été constaté que ces gaines étaient adaptées pour une utilisation allant jusqu'à 110°C. Ces gaines sont composées d'une couche externe faite d'un matériau semi-rigide réticulé. La couche interne est principalement en polyoléfine non réticulée qui coule et fond au cours du processus de rétreint pour obtenir une étanchéité. Les principales modifications techniques par rapport à la deuxième édition concernent la mise en conformité avec les spécifications nationales existantes.

General Information

• Status: Published
• Publication Date: 14-Feb-2007
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: TC 15 - Solid electrical insulating materials
• Drafting Committee: WG 5 - TC 15/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 15-May-2007
• Completion Date: 15-Feb-2007

Standards Content (Sample)

IEC 60684-3-246
®
Edition 3.0 2007-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Flexible insulating sleeving –
Part 3: Specifications for individual types of sleeving – Sheet 246: Heat-
shrinkable polyolefin sleeving, dual wall, non-flame retarded

Gaines isolantes souples –
Partie 3: Spécifications pour types particuliers de gaines – Feuille 246: Gaines
thermorétractables en polyoléfine, à double paroi, non retardées à la flamme

IEC 60684-3-246:2007

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IEC 60684-3-246
®
Edition 3.0 2007-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Flexible insulating sleeving –
Part 3: Specifications for individual types of sleeving – Sheet 246: Heat-
shrinkable polyolefin sleeving, dual wall, non-flame retarded

Gaines isolantes souples –
Partie 3: Spécifications pour types particuliers de gaines – Feuille 246: Gaines
thermorétractables en polyoléfine, à double paroi, non retardées à la flamme

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
L
CODE PRIX
ICS 29.035.20 ISBN 978-2-88910-248-8
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – 60684-3-246 © IEC:2007
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references.6
3 Designation .7
4 Conditions of test.7
5 Requirements .7
6 Sleeving conformance.7
7 Sealing performance test method.7

Figure 1 – Clamping tool for sealing performance test .8

Table 1 – Dimensional requirements.8
Table 2 – Property requirements .9
Table 3 – Additional property requirements.10
Table 4 – Requirements for breakdown voltage .10
Table 5 – Resistance to selected fluids.11

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60684-3-246 © IEC:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________

FLEXIBLE INSULATING SLEEVING –

Part 3: Specifications for individual types of sleeving –
Sheet 246: Heat-shrinkable polyolefin sleeving,
dual wall, non-flame retarded


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60684-3-246 has been prepared by IEC technical committee 15:
Solid electrical insulating materials.
This third edition cancels and replaces the second edition published in 2001, and constitutes a
technical revision.
The major technical changes with regard to the second edition concern a better alignment with
existing national specifications.

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– 4 – 60684-3-246 © IEC:2007
This bilingual version, published in 2009-06, corresponds to the English version.
The text of this standard is based on the following documents:
FDIS Report on voting
15C/358/FDIS 15C/371/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 60684 series, published under the general title Flexible insulating
sleeving, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.

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60684-3-246 © IEC:2007 – 5 –
INTRODUCTION
This International Standard is one of a series which deals with flexible insulating sleeving for
electrical purposes.
The series consists of three parts:
Part 1: Definitions and general requirements (IEC 60684-1)
Part 2: Methods of test (IEC 60684-2)
Part 3: Specifications for individual types of sleeving (IEC 60684-3)
This standard comprises one of the sheets of Part 3 as follows:
Sheet 246: Heat-shrinkable polyolefin sleeving, dual wall, non-flame retarded

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– 6 – 60684-3-246 © IEC:2007
FLEXIBLE INSULATING SLEEVING –

Part 3: Specifications for individual types of sleeving –
Sheet 246: Heat-shrinkable polyolefin sleeving,
dual wall, non-flame retarded


1 Scope
This part of IEC 60684 defines requirements for dual wall, non-flame retarded, heat shrinkable,
polyolefin sleeving. This sleeving has been found suitable for use up to 110 °C.
The sleeving consists of an outer layer made of a semi-rigid cross-linked material.
The inner layer is a substantially non-cross-linked polyolefin that flows and fuses during the
shrinkage process to provide a seal.
It is normally offered for sale with an internal diameter up to 25 mm in the following colours:
black, white, red, yellow, blue and translucent.
Sizes or colours other than those listed in this standard may be available as custom items.
These items are considered to comply with this standard if they comply with the property
requirements listed in Tables 2, 3, 4 and 5, excluding dimensions.
Materials which conform to this specification meet established levels of performance.
However, the selection of a material by a user for a specific application should be based on the
actual requirements necessary for adequate performance in that application and not based on
this specification alone.
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.
IEC 60684-1:2003, Flexible insulating sleeving – Part 1: Definitions and general requirements
1)
IEC 60684-2:1997, Flexible insulating sleeving – Part 2: Methods of test
Amendment 1 (2003)
Amendment 2 (2005)
IEC 60757:1983, Code for designation of colours
ISO 1817:2005, Rubber, vulcanized – Determination of the effect of liquids

___________
1)
 A consolidated edition 2.1 exists, including IEC 60684-2:1997 and its Amendment 1 (2003).

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60684-3-246 © IEC:2007 – 7 –
3 Designation
The sleeving shall be identified by the following designation, as shown in the following
example:

Description IEC IEC IEC Size Colour
publication part sheet (expanded/
number number number recovered
internal
diameter, in
millimetres)

↓ ↓ ↓ ↓ ↓ ↓
Sleeving IEC 60684 3 12,7/5,0  NC
246
- - - - -
NOTE NC is used for “Natural colour” / “No colour pigmentation”.
Any abbreviation of colour shall comply with IEC 60757. Where no abbreviation is given, the
colour shall be written in full.
4 Conditions of test
Unless otherwise specified, the sleeving shall be shrunk in a forced air circulation oven for
(10 ± 1) min at 200 °C ± 5 K prior to testing.
5 Requirements
In addition to the general requirements given in IEC 60684-1, the sleeving shall comply with the
requirements in Tables 1, 2, 3, 4 and 5.
6 Sleeving conformance
Conformance to the requirements of this specification shall normally be based on the results
from 12,7 mm/5,0 mm black sleeving. The colour fastness to light shall be determined for all
colours.
7 Sealing performance test method
Condition a nominal 150 mm length of sleeving at 200 °C ± 5 K for (5 ± 1) min and condition a
pair of pliers (clamping tool, see Figure 1) at the same temperature for at least 10 min. Within
5 s after removal from the oven, grip approximately 6 mm of one end of the sleeving with the
pliers with sufficient pressure so that the inner surfaces of the sleeving are in full contact. Hold
the pressure for at least 40 s, then release the pressure and condition the sleeving at a
temperature of 23 °C ± 2 K for at least 10 min.
Submerge the sealed end of the sleeving in at least 25 mm of water and pressurize the open
end with at least 20,7 kPa of air pressure for at least 5 s.
Observe whether any air bubbles escape from the sealed end of the sleeving.

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– 8 – 60684-3-246 © IEC:2007

Handles
Pivot
Flat face
clamping
jaws
Typical clamping tool
IEC  286/07

Figure 1 – Clamping tool for sealing performance test
Table 1 – Dimensional requirements
Internal diameter
Total recovered wall
mm
b)
a)
thickness
Size code
c)
Expanded Recovered
mm
min. max.
3,2/0,6 3,2 0,6
0,95 ± 0,20
4,7/1,5 4,7 1,5 1,10 ± 0,20
6,4/2,0 6,4 2,0 1,20 ± 0,25
9,5/3,4 9,5 3,4
1,30 ± 0,25
12,7/5,0 12,7 5,0
1,40 ± 0,25
19,1/8,0 19,1 8,0 1,65 ± 0,25
25,4/10,2 25,4 10,2
1,90 ± 0,25
7,6/1,3 7,6 1,3 2,50 ± 0,25
a)
These sizes are based on past industry practices for this type of sleeving.
b)
 The ratio of the inner wall thickness to the total wall thickness will typically lie between
0,3 and 0,7 .
c)
 In those cases where the inner wall distorts or flows during recovery, it may not be
possible to determine the recovered inside diameter accurately. In such cases, the
sleeving may be recovered over a mandrel or gauge of the specified diameter for the size
being measured, and then shall be examined for complete contact with the mandrel or
plug gauge to establish compliance with the requirements for the recovered diameter.

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60684-3-246 © IEC:2007 – 9 –
Table 2 – Property requirements
IEC 60684-2 Max.
Property clause or Units or Requirements Remarks
subclause min.
Dimensions 3
– internal diameter 3.1.2 mm Table 1
– wall thickness 3.3.2 mm Table 1
Density 1,0 Test specimens shall be cut
3
4 Max.
g/cm
from full sections of sleeving

Heat shock 6 – – No observable Heat at 250 °C ± 5 K
dripping, cracking

or flowing of the
outer wall

Longitudinal change 9 % Max. +1 Heat the expanded sleeving at
200 °C ± 5 K for (10 ± 1) min.
 −10
The final measurement shall
be on the outer wall only
Brittleness temperature 15 – – No visible
Test at –40 °C ± 3 K after
cracking or conditioning at the same

breaking
temperature.
The test shall be carried out
on specimens taken from
sleeving in the expanded
(as supplied) form
Dimensional stability on 16 – – The dimensions
storage shall be as
specified in
Table 1
Tensile strength 19.1 and MPa Min. 10 Test in the expanded form.
19.2  Use a jaw separation rate of
100 mm/min. For internal
Elongation at break 19.1 and % Min. 200
diameters <6,5 mm, use
19.2
sleeving samples for testing.
At internal nominal diameters
≥6,5 mm, use dumb-bell
samples cut from sleeving.
The cross-sectional area shall
be calculated based on the
jacket only
Secant modulus at 2 % 19.4 MPa Min. 175 Test in the expanded form.
elongation The cross-sectional area shall
be calculated based on the
jacket only
Breakdown voltage 21 kV Min. See Table 4
12
Volume resistivity at room 23 Min.
ΩØm 10
temperature
23.4.2
Copper corrosion 33 % Max. None above the Heat the specimens for
allowable 8 % (16 ± 0,5) h at 130 °C ± 2 K

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– 10 – 60684-3-246 © IEC:2007
Table 2 (continued)
IEC 60684-2 Max.
Property clause or Units or Requirements Remarks
subclause min.
Colour fastness to light 34  The colour Fastness standard No. 5
standard
contrast between
the exposed and
unexposed parts
of the specimen
shall be equal to
or less than that
of the fastness
standard
Resistance to selected fluids 36  Test in the expanded form.
   Use the fluids and test
temperatures specified in
Tensile strength 19.1 a
...