IEC 61212-3-1:2006

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

This part of IEC 61212-3 gives requirements for industrial rigid round laminated rolled tubes for electrical purposes, based on different resins and different reinforcements. 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.

General Information

• Status: Published
• Publication Date: 07-Mar-2006
• 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: DELPUB - Deleted Publication
• Completion Date: 29-Apr-2013

Relations

• Revised: 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
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 61212-3-1
Second edition
2006-03
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

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INTERNATIONAL IEC
STANDARD 61212-3-1
Second edition
2006-03
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 2006  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale M
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 61212-3-1  IEC:2006(E)
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 .8

Table 1 – Types of round rolled laminated tubes .8
Tables 2 – External and internal diameters of round rolled tubes .9
Table 3 – Permissible deviation from nominal internal diameter of round rolled tubes,
all types .10
Table 4 – Tolerance for wall thickness for round rolled tubes .10
Table 5 – Departure from straightness for round rolled tubes .10
Table 6 – Property requirements for round rolled tubes.11
Table 7 – 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) .13

61212-3-1  IEC:2006(E) – 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
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
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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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consensus of opinion on the relevant subjects since each technical committee has representation from all
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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Publications.
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 61212-3-1 has been prepared by IEC technical committee 15:
Standards on specifications for electrical insulating materials.
This second edition cancels and replaces the first edition published in 1995 and constitutes a
technical revision.
The main changes from the previous edition are as follows: added application use and safety
statements. Reformatted document to bring it up to current IEC document format. New types
EP GC 23 and PF CC 24 added and type PF CP 24 removed.

– 4 – 61212-3-1  IEC:2006(E)
The text of this standard is based on the following documents:
FDIS Report on voting
15/272/FDIS 15/305/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 bilingual version of this publication may be issued at a later date.
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.
61212-3-1  IEC:2006(E) – 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.

– 6 – 61212-3-1  IEC:2006(E)
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 61212-3 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 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 61212-1:2006, 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
ISO 472, Plastics – Vocabulary
3 Terms and definitions
For the purposes of this document, the following modified definition, which is taken from
ISO 472, applies.
___________
To be published
61212-3-1  IEC:2006(E) – 7 –
3.1
round laminated rolled tube (as applied to thermosets)
tube formed by rolling impregnated layers of material on a mandrel between heated pressure
rolls, curing in an oven, then removing the mandrel
[ISO 472 MOD]
4 Designations and abbreviations
4.1 General
The round laminated rolled tubes covered by this standard 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 x external (diameter) x
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 – 25×6×1000 – 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
– 8 – 61212-3-1  IEC:2006(E)
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 2a, 2b, 3, 4, 6, and 7, with the exception of
the
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