ISO INTERNATIONAL STANDARD 12678-2 First edition 1996-07-15 ANSI Internat Doc Sec Refractory products -- Measurement of dimensions and external defects of refractory bricks - Part 2: Corner and edge defects and other surface imperfections Produits réfractaires --- Mesurage des dimensions et des defauts externes des briques réfractaires - Partie 2: Defauts des angles et des aretes et autres imperfections de surface ISO Reference number ISO 12678-2:1996(E) No reproduction or networking permitted without license from IHS Not for Resale ISO 12678-2:1996(E) Foreword ISO (the tnternational Organization for Standardization) is a worldwide fed- eration 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. 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 avote. ISO/TC 33, Refractories. ISO 12678 consists of the following parts, under the general title Refrac- tory products -- Measurement of dimensions and external defects of re fractory bricks: Part 1: Dimensions and conformity to drawings Part 2: Corner and edge defects and other surface imperfections @ISO1996 All rights reserved. Unless otherwise specified, 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 Organization for Standardization CasePostale56.CH-1211Geneve20.Switzerland Printed in Switzerland ii No reproduction or networking permitted without Not for Resale INTERNATIONALSTANDARD ISO ISO12678-2:1996(E) Refractory products - Measurement of dimensions and external defects of refractory bricks - Part 2: Corner and edge defects and other surface imperfections 1 Scope ISO5019-2:1984,Refractorybricks- Dimensions Part 2: Arch bricks. This part of ISO 12678 describes apparatus and ISO 5019-3:1984,Refractory bricks-Dimensions specifies simplemethods forroutine measurement of Part 3: Rectangular checker bricks for regenerative cornerand edge defects, as well as other surface im- furnaces. perfections of refractory bricks. It does not apply to the measurement of internal defects. It does not es. ISO5019-4:1988,Refractorybricks Dimensions tablish criteria for acceptance or rejection of bricks Part 4: Dome bricks for electric arc furnace roofs. The application of these methods is limited to stan- ISO5019-5:1984,RefractorybricksDimensions- Part5:Skewbacks. dard shapes in accordance with IsO 5019-1 to ISO 5019-6 and ISO 5417, unless otherwise agreed. ISO5019-6:1984.Refractory bricks-Dimensions- Part 6: Basic bricks for oxygen steel-making con- verters. 2 Normative references ISO 5417:1986, Refractory bricks for use in rotary kilns-Dimensions. The following standards contain provisions which through reference in this text, constitute provisions of this part of ISO 12678. At the time of publication, the 3 Definitions editions indicated were valid. All standards are subject to revision, and parties to agreements based on this For the purposes of this part of ISO 12678, the follow- part of ISO 12678 are encouraged to investigate the ing definitions apply. possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Stan- 3.1 corner defect: Missing corner, defined by the dards. three dim