ISO INTERNATIONAL STANDARD 12678-1 First edition 1996-07-15 Refractory products - Measurement of dimensions and external defects of refractory bricks - Part 1: Dimensions and conformity to drawings Produits réfractaires - Mesurage des dimensions et des defauts externes desbriquesréfractaires Partie 1: Dimensions et conformité aux plans ISO Reference number ISO 12678-1:1996(E) IS0 12678-1:1996(E) Foreword preparing International Standards is normally carried out through isO 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 International Standard ISO 12678-1 was prepared by Technical Committee ISO/TC33, Refractories. ISO 12678 consists of the following parts, under the general title Refrac- tory products -- Measurement of dimensions and external defects of re- fractorybricks: 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. InternationalOrganizationforStandardization Case Postale 56 . CH-1211 Geneve 20 . Switzerland Printed in Switzerland ii INTERNATIONAL STANDARD ISO ISO 12678-1:1996(E) Refractory products - Measurement of dimensions and external defects of refractory bricks - Part 1: Dimensions and conformity to drawings 1 Scope ISO 5019-2:1984, Refractory bricks —Dimensions Part 2: Arch bricks. This part of ISO 12678 describes apparatus and ISO 5019-3:1984, Refractory bricks - Dimensions specifies simple methods for routine measurement of Part 3: Rectangular checker bricks for regenerative dimensions of refractory bricks. It also specifies furnaces. methods for inspection of conformity to shape, de- termining concavity, convexity and out-of-squareness. IsO 5019-4:1988, Refractory bricks - Dimensions It does not establish criteria for acceptance or rejec- Part 4: Dome bricks for electric arc furnace roofs. tion of bricks. ISO 5019-5:1984, Refractory bricks - Dimensions - Part 5: Skewbacks. The application of these methods is limited to stan- dardshapes in accordance with ISO 5019-1to IsO 5019-6:1984, Refractory bricks —Dimensions ISO 5019-6 and ISO 5417, unless otherwise agreed. Part 6: Basic bricks for oxygen steel-making con- verters. ISo 5417:1986, Refractory bricks for use in rotary 2 Normative references kilns -Dimensions. The following standards contain provisions which, through reference in this text, constitute provisions of 3 Apparatus thispartofISO12678.Atthetimeofpublication,the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 12678 are encouraged to investigate the 3.1 General possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Stan All instruments shall be calibrated or certified to within dards. the accuracy of the measurements. The accuracy of the linear measuring device (3.2) shall be checked ISO 5019-1:1984, Refractory bricks — Dimensions regularly against a length bar complying with national Part 1: Rectangular bricks. standards.