IEC 61212-3-1:2013

Insulating materials - Industrial rigid round laminated tubes and rods based on thermosetting resins for electrical purposes - Part 3: Specifications for individual materials - Sheet 1: Round laminated rolled tubes

IEC 61212-3-1:2013 gives requirements for industrial rigid round laminated rolled tubes for electrical purposes, based on different resins and different reinforcements. Applications and distinguishing properties are given in Table 1. 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. This third edition cancels and replaces the second edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: Details of test for insulation resistance after immersion in water and values for permissible deviation from nominal external diameter of round rolled tubes in the "as rolled and cured" condition are changed. Key words: industrial rigid round laminated rolled tubes

Matériaux isolants - Tubes et barres industriels rigides, ronds, stratifiés, à base de résines thermodurcissables, à usages électriques - Partie 3: Spécifications pour matériaux particuliers - Feuille 1: Tubes ronds stratifiés enroulés

La CEI 61212-3-1:2013 donne les exigences relatives aux tubes industriels rigides ronds, stratifiés, enroulés, à usages électriques, à base de différentes résines et de différents matériaux de renfort. Les applications et les propriétés distinctives sont données au Tableau 1. Les matériaux qui sont conformes à cette spécification satisfont à des niveaux de performances établis. Cependant, il convient que le choix d'un matériau par un utilisateur et pour une application particulière soit fondé sur les exigences réelles nécessaires pour obtenir les performances satisfaisantes pour cette application, et non pas fondé sur cette seule spécification. Cette troisième édition annule et remplace la deuxième édition parue en 2006. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: Les détails d'essais relatifs à la résistance d'isolement, ainsi que les valeurs d'écart admissible par rapport au diamètre extérieur nominal des tubes ronds enroulés en l'état "enroulé et traité" après immersion dans l'eau ont été modifiés. Mots clès: tubes industriels rigides ronds, stratifiés, enroulés

General Information

• Status: Published
• Publication Date: 28-Apr-2013
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.035.01 - Insulating materials in general
• Technical Committee: TC 15 - Solid electrical insulating materials
• Drafting Committee: WG 6 - TC 15/WG 6
• Current Stage: PPUB - Publication issued
• Start Date: 31-May-2013
• Completion Date: 29-Apr-2013

Standards Content (Sample)

IEC 61212-3-1
®

Edition 3.0 2013-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Insulating materials – Industrial rigid round laminated tubes and rods based on
thermosetting resins for electrical purposes –
Part 3: Specifications for individual materials – Sheet 1: Round laminated rolled
tubes

Matériaux isolants – Tubes et barres industriels rigides, ronds, stratifiés, à base
de résines thermodurcissables, à usages électriques –
Partie 3: Spécifications pour matériaux particuliers – Feuille 1: Tubes ronds
stratifiés enroulés

IEC 61212-3-1:2013

---------------------- Page: 1 ----------------------
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IEC 61212-3-1

®


Edition 3.0 2013-04




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Insulating materials – Industrial rigid round laminated tubes and rods based on

thermosetting resins for electrical purposes –

Part 3: Specifications for individual materials – Sheet 1: Round laminated rolled


tubes



Matériaux isolants – Tubes et barres industriels rigides, ronds, stratifiés, à base


de résines thermodurcissables, à usages électriques –

Partie 3: Spécifications pour matériaux particuliers – Feuille 1: Tubes ronds

stratifiés enroulés










INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX P


ICS 29.035.01 ISBN 978-2-83220-760-4



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – 61212-3-1 © IEC:2013
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Designations and abbreviations . 7
4.1 General . 7
4.2 Designation . 7
4.3 Abbreviations . 7
5 Requirements . 7
Bibliography . 16

Table 1 – Types of industrial round rolled tubes . 8
Table 2 – Permissible deviation from nominal external diameter of round rolled tubes
in the “as rolled and cured” condition . 9
Table 3 – Permissible deviation from nominal external diameter of round rolled tubes
in ground or turned condition, all types . 9
Table 4 – Permissible deviation from nominal internal diameter of round rolled tubes,
all types . 10
Table 5 – Tolerance on wall thickness for round rolled tubes . 10
Table 6 – Departure from straightness for round rolled tubes . 11
Table 7– Property requirements for round rolled tubes . 12
Table 8 – Electric strength at 90 °C in oil, perpendicular to laminations, for round
a
rolled tubes (1 min proof test or 20 s step-by-step test) (kV/mm) . 15

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61212-3-1 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

INSULATING MATERIALS – INDUSTRIAL RIGID ROUND
LAMINATED TUBES AND RODS BASED ON THERMOSETTING
RESINS FOR ELECTRICAL PURPOSES –

Part 3: Specifications for individual materials –
Sheet 1: Round laminated rolled tubes

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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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61212-3-1 has been prepared by IEC technical committee 15:
Solid electrical insulating materials.
This third edition cancels and replaces the second edition published in 2006. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
Details of test for insulation resistance after immersion in water and values for permissible
deviation from nominal external diameter of round rolled tubes in the “as rolled and cured”
condition are changed.

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– 4 – 61212-3-1 © IEC:2013
The text of this standard is based on the following documents:
FDIS Report on voting
15/699/FDIS 15/709/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.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 61212 series, under the general title Insulating materials –
Industrial rigid round laminated tubes and rods based on thermosetting resins for electrical
purposes, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability 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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61212-3-1 © IEC:2013 – 5 –
INTRODUCTION
This part of IEC 61212 is one of a series which deals with industrial rigid round laminated
tubes and rods based on thermosetting resins for electrical purposes.
This series consists of three parts:
Part 1: Definitions, designations and general requirements (IEC 61212-1)
Part 2: Methods of test (IEC 61212-2)
Part 3: Specifications for individual materials (IEC 61212-3)
IEC 61212-3-1 contains one of the specification sheets comprising Part 3, as follows:
Sheet 1: Round laminated rolled tubes.

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– 6 – 61212-3-1 © IEC:2013
INSULATING MATERIALS – INDUSTRIAL RIGID ROUND
LAMINATED TUBES AND RODS BASED ON THERMOSETTING
RESINS FOR ELECTRICAL PURPOSES –

Part 3: Specifications for individual materials –
Sheet 1: Round laminated rolled tubes



1 Scope
This part of IEC 61212 gives requirements for industrial rigid round laminated rolled tubes for
electrical purposes, based on different resins and different reinforcements.
Applications and distinguishing properties are given in Table 1.
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.
Safety warning:
It is the responsibility of the user of the methods contained or referred to in this document to
ensure that they are used in a safe manner.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61212-1, Insulating materials – Industrial rigid round laminated tubes and rods based on
thermosetting resins for electrical purposes – Part 1: Definitions, designations and general
requirements
IEC 61212-2:2006, Insulating materials – Industrial rigid round laminated tubes and rods
based on thermosetting resins for electrical purposes – Part 2: Methods of test
3 Terms and definitions
For the purposes of this document, the following term and definition apply.
3.1
round laminated rolled tube
tube formed by rolling impregnated layers of material on a mandrel between
heated pressure rolls, curing in an oven, then removing the mandrel
[SOURCE: ISO 472:1999, modified – The word “round” has been added to the term.]

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61212-3-1 © IEC:2013 – 7 –
4 Designations and abbreviations
4.1 General
The round laminated rolled tubes covered by this Part 3 sheet are classified into types which
differ in the resin and reinforcement used, the method of manufacture and their distinguishing
properties.
4.2 Designation
Individual types are designated by
– a two-letter abbreviation denoting the resin;
– a second two-letter abbreviation, denoting the reinforcement;
– a serial number of two digits, the first digit denoting the form of the material,
– a “2” indicates rolled tubes, and
– a second digit denoting sub-grades of the same type.
The abbreviations are given in 4.3.
The complete designation of the rolled tube is denoted by
– description: rolled tube;
– number of the IEC standard: IEC 61212-3-1;
– designation of the individual type;
– dimensions (in millimetres) of the rolled tube:
internal diameter × external diameter × length;
– a letter designating the finish on the external diameter of the rolled tube:
"A" designating tubes in the "as produced" condition;
"B" designating tubes in ground or turned condition.
EXAMPLE Rolled tube, IEC 61212-3-1 – EP GC 21 – 25 × 30 × 1 000 – A.

4.3 Abbreviations
Types of resin Types of reinforcement
EP Epoxy (epoxide) CC Woven cotton cloth
MF Melamine CP Cellulosic paper
PF Phenolic GC Woven glass cloth
SI Silicone MP Mica paper
5 Requirements
In addition to the general requirements given in IEC 61212-1, the rolled tubes shall comply
with the additional requirements given in Tables 2, 3, 4, 5, 6, 7, and 8, with the exception of
the length of tube supplied, which shall be subject to agreement between buyer and seller.

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– 8 – 61212-3-1 © IEC:2013
Table 1 – Types of industrial round rolled tubes

a
Resin Reinforcement Serial number Applications and distinguishing characteristics
Mechanical, electrical and electronic applications. Extremely
high mechanical strength at moderate temperatures. Very good
21
stability of electrical properties when exposed to high relative
humidity.
GC
Similar to EP GC 21, but with high mechanical strength at
22
EP
elevated temperature.
23 Similar to EP GC 21, but with improved flame resistance.
Mechanical, electrical and electronic applications. Good stability
MP 21 of electrical properties when exposed to high relative humidity.
Good heat resistance.
Mechanical and electrical applications. High mechanical
MF GC 21
strength. Good arc and tracking resistance.
b
21 Mechanical and electrical applications. Fine weave .
b
22 Mechanical and electrical applications. Coarse weave .
CC b
23 Mechanical applications. Very coarse weave .
Similar to PF CC 21. For close tolerance machining applications
24
b
(very fine weave) .
Mechanical and low voltage electrical applications. Good
21
PF
electrical properties when exposed to normal relative humidity.
High voltage electrical applications at power frequencies. High
CP 22
electric strength in oil.
Similar to type PF CP 21, but with improved electrical properties
23
when exposed to high relative humidity.
Mechanical and electrical applications. Very high mechanical
GC 21
strength at moderate temperatures.
Mechanical, electrical and electronic applications when exposed
GC 21
to high relative humidity.
SI
Mechanical, electrical and electronic applications. Good stability
MP 21
of electrical properties at elevated temperatures.
a
It should not be inferred from the contents of Table 1 that round laminated rolled tubes of any particular type
are necessarily unsuitable for applications other than those listed for them, or that specific round laminated
rolled tubes will be suitable for all applications within the wide description given.
b
Fabric weaves of type CC reinforcements:

Mass per unit area Thread count
2 -1
g/m cm
Very coarse weave > 200 < 18
Coarse weave 18 to 29
> 130
Fine weave 30 to 37
≤ 130
Very fine weave
≤ 125 > 37
These values are only for information. They are not to be considered as specification values. In general, the
finer weave materials have better machining characteristics.

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61212-3-1 © IEC:2013 – 9 –
Table 2 – Permissible deviation from nominal external diameter
of round rolled tubes in the “as rolled and cured” condition
a
Maximum deviation
± mm
Nominal external diameter D
mm Type
PF CP All other types
≤ 0
0,3 0,5
10 < D ≤ 20
0,4 0,6
20 < D ≤ 50
0,4
0,6
50 < D ≤ 75
0,5 0,7
75 < D ≤ 100 0,7 1,2
1,0 1,7
100 < D ≤ 150
1,2 1,9
150 < D ≤ 200
1,4
2,2
200 < D ≤ 300
1,6 2,5
300 < D ≤ 500
1,8 3,0
> 500
Test method: see 4.1 of IEC 61212-2:2006.

a
If a unilateral tolerance is agreed between purchaser and supplier, the tolerance
shall not exceed twice the value given in the table.

Table 3 – Permissible deviation from nominal external diameter
of round rolled tubes in ground or turned condition, all types
a
Nominal external diameter D Maximum deviation
mm ± mm
0,15
≤ 10
0,20
10 < D ≤ 25
0,25
25 < D ≤ 50
0,30
50 < D ≤ 75
0,35
75 < D ≤ 100
0,45
100 < D ≤ 125
0,50
125 < D ≤ 200

b
>200
Test method: see 4.2 of IEC 61212-2:2006.
a
 If a unilateral tolerance is agreed between purchaser and supplier, the tolerance
shall not exceed twice the value given in the table.
b
By agreement between purchaser and manufacturer.

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Table 4 – Permissible deviation from nominal internal diameter
of round rolled tubes, all types
a
Maximum deviation
Nominal internal diameter d
mm ± mm
≤ 3
0,10
3 < d ≤ 30
0,15
30 < d ≤ 50
0,20
50 < d ≤ 75
0,30
75 < d ≤ 100 0,40
0,50
100 < d ≤ 150
0,70
150 < d ≤ 200
1,00
200 < d ≤ 300
1,50
300 < d ≤ 500
2,00
> 500
Test method: see 4.3 of IEC 61212-2:2006.
a
If a unilateral tolerance is agreed between purchaser and supplier, the tolerance
may not be greater than twice the value given in the table.

Table 5 – Tolerance on wall thickness for round rolled tubes
Maximum deviation
± mm
Nominal wall thickness t
mm
All PF CP types All other types
≤ 1,5
0,25 0,40
1,5 < t ≤ 3,0 0,40
0,50
3,0 < t ≤ 6,0 0,50 0,50
6,0 < t ≤ 12,0 0,80 0,80
1,20 1,20
12,0 < t ≤ 25,0
1,60 1,60
> 25,0
Test method: see 4.4 of IEC 61212-2:2006.

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61212-3-1 © IEC:2013 – 11 –
Table 6 – Departure from straightness for round rolled tubes
Nominal external diameter D Maximum deviation
mm mm
2
D < 8 8 L
2
6 L
D ≥ 8
Test method: see 4.5 of IEC 61212-2:2006.
The departure from straightness of any tube shall not exceed the
appropriate limiting value given above, where L is the length of the
tube in metres.

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– 12 – 61212-3-1 © IEC:2013

Table 7– Property requirements for round rolled tubes
Method of Type Remarks
test
EP EP EP EP MF PF PF PF PF PF PF PF PF SI SI
Maximum
IEC 61212-
GC GC GC MP GC CC CC CC CC CP CP CP GC GC MP
Property Unit or
2:2006
21 22 23 21 21 21 22 23 24 21 22 23 21 21 21
minimum
(Subclause
No.)
Generally applicable to tubes
where satisfactory test
Flexural
pieces according to
strength
IEC 61212-2:2006, 5.1.1,
a
perpendicular 5.1 MPa minimum 300 300 100 120 90 80 80 100 100 100 100 140 100 75
300
can be produced. For all
to
others the test for cohesion
laminations
between layers can be an
alternative method.
Axial
compressive 5.2 MPa minimum 175 175 175 60 80 110 100 100 120 100 80 100 120 40 40
strength
Cohesion Applicable only to tubes of
between 5.3 MPa minimum 200 200 200 30 150 90 90 90 100 70 70 70 200 50 25 nominal internal diameter not
layers greater than 100 mm.
The 20 s step-by-step test
Breakdown
and the 1 min proof test for
voltage at
b breakdown voltage at 90 °C
90°C in oil 6.1 kV minimum 40 40 40 30 10 10 10 8 10 15 50 25 15 35 20
in oil, parallel to
parallel to
laminations, are
laminations
alternatives.
Electric
strength at
Applicable only to tubes of
90°C in oil
6.1 kV/mm minimum See Table 8 nominal wall thickness not
perpendicular
greater than 3 mm.
to
laminations
Insulation
resistance
after 6.2 minimum 1 000 1 000 1 000 100 0,1 10 2 0,5 2 1 1 5 20 100 10
MΩ
immersion in
water

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61212-3-1 © IEC:2013 – 13 –


Method of Type Remarks
test
EP EP EP EP MF PF PF PF PF PF PF PF PF SI SI
Maximum
IEC 61212- GC GC GC MP GC CC CC CC CC CP CP CP GC GC MP
Property Unit or
2:2006 22 23 21 21 21
minimum 21 22 23 21 21 21 22 23 24 21
(Subclause
No.)
Dissipation
Conformance with the
factor

requirement for either test
1 MHz
6.3 - maximum (0,04) (0,04) (0,04) (0,04) (0,02) -- -- -- -- -- -- -- (0,04) (0,01) (0,02) constitutes conformance with
the specification in this
48 Hz to
(0,05) (0,05) (0,05) -- -- -- -- -- -- -- -- -- -- (0,05) --
respect.
62 Hz
Permittivity
Conformance with the

requirement for either test
1 MHz 6.3 maximum
- (5,2) (5,2) (5,2) (5,2) (8,0) -- -- -- -- -- -- -- (6,0) (5,0) (5,3) constitutes conformance with
48 Hz to
the specification in this
-- -- -- -- -- -- -- -- -- -- -- -- -- -- --
respect.
62 Hz
Thermal
7.1 TI (130) (155) (130) (155) (130) (120) (120) (120) (120) (120) (120) (120) (130) (180) (180)
endurance
Water mg/
7.2 maximum 1,5 1,5 1,5 2,0 5,0 5,0 10,0 13,0 5,0 10,0 10,0 5,0 3,0 2,0 3,5
2
absorption cm
(1,70 (1,70 (1,70 (1,50 (1,70 (1,15 (1,15 (1,15 (1,15 (1,10 (1,05 (1,10 (1,70 (1,60 (1,60
3
Density 7.3 g/cm Range – – – – – – – – – – – – – – –
1,90) 1,90) 1,90) 1,80) 1,90) 1,35) 1,35) 1,35) 1,35) 1,20) 1,15) 1,20) 1,90) 1,80) 1,90)
The small-scale laboratory
test used in this standard for
assigning a flammability
category is primarily for
monitoring consistency of
production of products. The
Cate-
Flammability 7.4 - -- -- V-0 -- V-0 -- -- -- -- -- -- -- -- V-0 V-0 results so obtained should
gory
not in any circumstances be
considered as an overall
indication of the potential fire
hazards presented by these
products under actual
conditions of use.

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– 14 – 61212-3-1 © IEC:2013


Values in brackets “( )” are typical values intended to give only general guidance and are not to be considered as requirement of this standard.
A double dash “--“ signifies that there is no requirement.


a
For type EP GC 22: The flexural strength measured at 150 °C ± 5 K after conditioning for 1 h at 150 °C ± 5 K in air shall not be less than 50 % of the value specified in the table.
b
After preconditioning in air at 105 ºC ± 5 K for 96 h immediately before test and transferring immediately into the hot oil.

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61212-3-1 © IEC:2013 – 15 –
Table 8 – Electric strength at 90 °C in oil, perpendicular to laminations,
a
for round rolled tubes (1 min proof test or 20 s step-by-step test) (kV/mm)
b
Nominal wall thickness of test specimen
mm
Type
0,5 0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0 2,2 2,4 2,5 2,6 2,8 3,0
EP GC 21 -- -- 12,2 11,6 11,0 10,4 9,8 9,4 9,0 8,7 8,4 8,2 8,1 7,9 7,7
EP GC 22 -- -- 12,2 11,6 11,0 10,4 9,8 9,4 9,0 8,7 8,4 8,2 8,1 7,9 7,7
EP GC 23 -- -- 12,2 11,6 11,0 10,4 9,8 9,4 9,0 8,7 8,4 8,2 8,1 7,9 7,7
EP MP 21 17,0 16,5 15,8 15,0 14,0 13,5 13,0 12,5 12,0 11,8 11,6 11,5 11,4 11,2 11,0
MF GC 21 -- -- 4,9 4,8 4,6 4,4 4,2 4,1 4,0 3,9 3,8 3,7 3,6 3,4 3,3
PF CC 21 -- -- 2,5 2,4 2,3 2,2 2,1 2,1 2,0 1,9 1,9 1,8 1,8 1,7 1,6

PF CC 22 -- -- -- 2,4 2,3 2,2 2,1 2,1 2,0 1,9 1,9 1,8 1,8 1,7 1,6
PF CC 23 -- -- -- -- -- -- -- -- 2,0 1,9 1,9 1,8 1,8 1,7 1,6
PF CC 24 -- -- 2,5 2,4 2,3 2,2 2,1 2,1 2,0 1,9 1,9 1,8 1,8 1,7 1,6
PF CP 21 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
c
PF CP 22 -- -- -- 13,5 12,8 12,2 11,6 11,2 10,8 10,5 10,3 10,2 10,1 10,0 9,9
PF CP 23 13,0 12,2 10,7 9,7 9,0 8,2 7,8 7,4 7,0 6,7 6,5 6,4 6,3 6,2 6,1
PF GC 21 -- -- 7,0 6,8 6,5 6,3 6,0 5,8 5,6 5,4 5,3 5,2 5,1 4,9 4,8
SI GC 21 -- -- 8,6 8,3 8,0 7,8 7,5 7,3 7,0 6,8 6,6 6,5 6,4 6,2 6,0
SI MP 21 17,0 16,5 15,8 15,0 14,0 13,5 13,0 12,5 12,0 11,8 11,6 11,5 11,4 11,2 11,0
Test method: see 6.1 of IEC 61212-2:2006.
NOTE A double dash, “--“, signifies that there is no requirement.
a The requirements for the 20 s step-by-step test and the 1 min proof test for electric strength at 90 °C in oil, perpendicular
to laminations, are alternatives. A material meeting either requirement is deemed to comply with the specification with
respect to electric strength at 90 °C in oil, perpendicular to laminations.
b If the nominal wall thickness of the test specimen lies between two values of wall thickness shown in the above table, the
limit is obtained by interpolation. If the nominal wall thickness is below the minimum thickness for which a li
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