EN ISO 1893:2008

Refractory products - Determination of refractoriness under load - Differential method with rising temperature (ISO 1893:2007)

ISO 1893:2007 specifies a method for determining the deformation of dense and insulating shaped refractory products, when subjected to a constant load under conditions of progressively rising temperature (or refractoriness under load), by a differential method. The test may be carried out up to a maximum temperature of 1700 °C.

Feuerfeste Erzeugnisse - Bestimmung des Erweichungsverhaltens unter Druck (Druckerweichen) - Differentialverfahren mit steigender Temperatur (ISO 1893:2007)

Diese Internationale Norm legt ein Verfahren zur Bestimmung der Verformung von dichten feuerfesten
Erzeugnissen und geformten feuerfesten Erzeugnissen für Wärmedämmzwecke fest, die bei einer
gleichmäßig steigenden Temperatur einem konstanten Druck (Druckerweichen) unterworfen und mittels eines
Differentialverfahrens bewertet werden. Die Bestimmung ist bis zu einer Höchsttemperatur von 1 700 °C
anwendbar.

Produits réfractaires - Détermination de l'affaissement sous charge - Méthode différentielle avec élévation de la température (ISO 1893:2007)

L'ISO 1893:2007 spécifie une méthode qui permet de déterminer la déformation des produits réfractaires façonnés denses et isolants qui sont soumis à une charge constante dans des conditions d'élévation progressive de la température (détermination de l'affaissement sous charge), par une méthode différentielle. L'essai peut être réalisé jusqu'à une température maximale de 1 700 °C.

Ognjevzdržni izdelki - Ugotavljanje ognjevzdržnosti pod obremenitvijo - Diferenčna metoda z naraščajočo temperaturo (ISO 1893:2007)

General Information

• Status: Published
• Publication Date: 03-Jun-2008
• Withdrawal Date: 30-Dec-2008
• ICS: 81.080 - Refractories
• Technical Committee: CEN/TC 187 - Refractory products and materials
• Drafting Committee: CEN/TC 187/WG 1 - Dense shaped refractory products
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 04-Jun-2008
• Due Date: 22-Mar-2009
• Completion Date: 04-Jun-2008
• Ref Project: SIST EN ISO 1893:2008 - Refractory products - Determination of refractoriness under load - Differential method with rising temperature (ISO 1893:2007)

Relations

• Replaces: EN 993-8:1997 - Methods of testing dense shaped refractory products - Part 8: Determination of refractoriness-under-load
• Effective Date: 22-Dec-2008

Overview

EN ISO 1893:2008 (ISO 1893:2007) specifies a standardized laboratory method for determining the refractoriness under load of dense and insulating shaped refractory products. Using a differential method with rising temperature, the test measures deformation of a cylindrical test piece under a constant compressive load while the temperature is progressively increased (test temperatures up to 1 700 °C). This European adoption by CEN supersedes EN 993-8:1997 and is intended for reproducible assessment of behaviour of refractories under combined effects of load, time and rising temperature.

Key topics and technical requirements

• Principle: A cylindrical specimen is loaded with a specified constant compressive load; deformation is recorded as temperature rises and temperatures for specified proportional deformations are determined.
• Maximum test temperature: up to 1700 °C.
• Apparatus essentials:
  • Loading device with fixed and moving columns (≥45 mm external diameter).
  • Two refractory discs (5–10 mm thick, ≥50.5 mm diameter) between columns and specimen.
  • Measuring device (dilatometer) using inner and outer alumina tubes to transmit displacement to an instrument (dial gauge or length transducer).
  • Measuring sensitivity: at least 0.005 mm.
  • Thermocouples: central thermocouple at mid-point of specimen and control thermocouple for furnace regulation (referenced to IEC 60584).
• Furnace requirements: vertical axis furnace capable of specified heating rate; temperature uniformity around the specimen (above 500 °C) within ±20 °C.
• Test procedure and reporting: specimen preparation, controlled heating rate, continuous deformation recording, calculation of results (temperatures corresponding to proportional subsidence), and a standardized test report.
• Normative references: ISO 3599 (callipers), IEC 60584‑1/2 (thermocouples).

Applications and who uses this standard

• Quality control and acceptance testing of shaped refractories used in steel, cement, glass, petrochemical and high-temperature industrial furnaces.
• Product development and comparative R&D to assess high‑temperature deformation under load.
• Materials engineers, refractory manufacturers, independent testing laboratories, certification bodies and plant operators who specify or validate refractory performance under service-like thermal and mechanical stress.

Related standards

• ISO 3599 - precision vernier callipers (measurement equipment)
• IEC 60584-1 / IEC 60584-2 - thermocouple reference tables and tolerances
• Superseded: EN 993-8:1997

EN ISO 1893:2008 is a practical, reproducible method for assessing the refractoriness under load of shaped refractory products, helping manufacturers and end-users ensure material selection and performance for high‑temperature service.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2008
1DGRPHãþD
SIST EN 993-8:1998
2JQMHY]GUåQLL]GHONL8JRWDYOMDQMHRJQMHY]GUåQRVWLSRGREUHPHQLWYLMR'LIHUHQþQD
PHWRGD]QDUDãþDMRþRWHPSHUDWXUR,62
Refractory products - Determination of refractoriness under load - Differential method
with rising temperature (ISO 1893:2007)
Einführendes Element - Haupt-Element - Ergänzendes Element (ISO 1893:2007)
Produits réfractaires - Détermination de l'affaissement sous charge - Méthode
différentielle avec élévation de la température (ISO 1893:2007)
Ta slovenski standard je istoveten z: EN ISO 1893:2008
ICS:
81.080 Ognjevzdržni materiali Refractories
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 1893
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2008
ICS 81.080 Supersedes EN 993-8:1997
English Version
Refractory products - Determination of refractoriness under load
- Differential method with rising temperature (ISO 1893:2007)
Produits réfractaires - Détermination de l'affaissement sous Feuerfeste Erzeugnisse - Bestimmung des
charge - Méthode différentielle avec élévation de la Erweichungsverhaltens unter Druck (Druckerweichen) -
température (ISO 1893:2007) Differentialverfahren mit steigender Temperatur (ISO
1893:2007)
This European Standard was approved by CEN on 29 May 2008.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1893:2008: E
worldwide for CEN national Members.

Contents Page
Foreword.3

Foreword
The text of ISO 1893:2007 has been prepared by Technical Committee ISO/TC 33 “Refractories” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 1893:2008 by
Technical Committee CEN/TC 187 “Refractory products and materials” the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by December 2008, and conflicting national standards shall be withdrawn
at the latest by December 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 993-8:1997.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 1893:2007 has been approved by CEN as a EN ISO 1893:2008 without any modification.

INTERNATIONAL ISO
STANDARD 1893
Third edition
2007-09-15
Refractory products — Determination of
refractoriness under load — Differential
method with rising temperature
Produits réfractaires — Détermination de l'affaissement sous charge —
Méthode différentielle avec élévation de la température

Reference number
ISO 1893:2007(E)
©
ISO 2007
ISO 1893:2007(E)
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ii © ISO 2007 – All rights reserved

ISO 1893:2007(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Principle. 1
5 Apparatus . 2
6 Test piece . 7
7 Procedure . 8
8 Calculation of results . 8
9 Test report . 10
Annex A (normative) Measuring device below or above the furnace. 11
Bibliography . 12

ISO 1893:2007(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 1893 was prepared by Technical Committee ISO/TC 33, Refractories.
This third edition cancels and replaces the second edition (ISO 1893:2005), which has been technically
revised. The main changes are corrections to the figures and improvements in the description of the
calculation procedure given in 8.2.

iv © ISO 2007 – All rights reserved

INTERNATIONAL STANDARD ISO 1893:2007(E)

Refractory products — Determination of refractoriness under
load — Differential method with rising temperature
1 Scope
This International Standard specifies a method for determining the deformation of dense and insulating
shaped refractory products, when subjected to a constant load under conditions of progressively rising
temperature (or refractoriness under load), by a differential method. The test may be carried out up to a
maximum temperature of 1 700 °C.
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.
ISO 3599, Vernier callipers reading to 0,1 and 0,05 mm
IEC 60584-1, Thermocouples — Part 1: References tables
IEC 60584-2, Thermocouples — Part 2: Tolerances
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
refractoriness under load
measure of the behaviour of a refractory material subjected to the combined effects of load, rising temperature
and time
4 Principle
A cylindrical test piece is subjected to a specified constant compressive load and heated at a specified rate of
temperature increase until a prescribed deformation or subsidence occurs. The deformation of the test piece
is recorded as the temperature increases, and the temperatures corresponding to specified proportional
degrees of deformation are determined.
ISO 1893:2007(E)
5 Apparatus
5.1 Loading device
5.1.1 General
The loading device shall be capable of applying a load centred on the common axis of the loading column, the
test piece and the supporting column, and directed vertically along this axis at all stages of the test. The
loading device consists of the items given in 5.1.2 to 5.1.4.
A constant compressive load is applied in a downward direction from above the test piece which is resting
directly or indirectly on a fixed base. The deformation of the test piece is measured by a device that passes
either through the loading device or through an intermediate base.
The text and Figures 1 and 2 show the measuring device passing through the base but, by interchanging the
bored column and refractory plate with the unbored column and plate, the measuring device may pass
through the loading device, as in Figure 3.
Although both arrangements are within the scope of this International Standard, it is preferable that the
measuring device be positioned below the assembly, as shown in Figure 2. The reasons for this are outlined
in Annex A.
5.1.2 Fixed column
The fixed column shall be at least 45 mm in external diameter and with an axial bore (see 5.1.5).
5.1.3 Moving column
The moving column shall be at least 45 mm in external diameter.
NOTE Arrangements can be made for the moving column to be fixed to the furnace, and the combination of furnace
and column then forms the moveable loading device.
5.1.4 Two discs
The two discs shall be 5 mm to 10 mm thick, at least 50,5 mm in diameter and not less than the actual
diameter of the test pieces, and shall be made of an appropriate refractory material compatible with the
material under test.
EXAMPLES High-fired mullite or alumina for alumino-silicate products or magnesia or spinel for basic products.
These discs are placed between the test piece and the fixed and moving columns. The disc pla
...