ISO INTERNATIONAL STANDARD 20723 First edition 2004-12-01 Structural steelsSurface condition of hot-rolled sections Delivery requirements Aciersde construction-Etatdesurfacedesprofiles laminésa chaud-Exigencesdelivraison Reference number ISO 20723:2004(E) @ISO 2004 ISO20723:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ISO's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2004 - All rights reserved ISO20723:2004(E) Contents Page Foreword. iv 1 Scope 2 Normative references 3 Termsanddefinitions 4 Measurementprocedure. 5 Requirements. 5.1 Repairprocedure 5.2 Typesandclasses 5.3 Classificationofdiscontinuities 6 Repairprocedures .... 6.1 Grinding or other types of machining... 6.2 Welding .... Annex A (informative) Description of the most common discontinuities .. Bibliography .. @ ISO 2004 All rights reserved ili ISO20723:2004(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 InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC 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. ISO20723waspreparedbyTechnicalCommitteeISO/TC17,Steel,SubcommitteeSC3,Steelsforstructural purposes. iv @ ISO 2004 All rights reserved ISO 20723:2004(E) INTERNATIONALSTANDARD Structural steels Surface condition of hot-rolled sections Delivery requirements 1 Scope This International Standard specifies delivery requirements that apply to the surface condition of hot-rolled sections with nominal thickness between ≥3 mmand≤ 160 mm. It applies to all surfaces excluding edges. 2 Normativereferences 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 6929,Steel products—Definitions and classification 3 Terms and definitions For the purposes of this document, the terms and definitions given in IsO 6929 and the following apply 3.1 imperfection surface discontinuity with a depth and/or area equal to or less than a specified limiting value 3.2 defect NOTE For most common surface discontinuities, see the descriptions in Annex A. 4 Measurementprocedure 4.1 To differentiate the surface discontinuities in terms of imperfections and defects, the depth of determined after the discontinuity has been removed by grinding, or other methods such as machining. 4.2 Areas affected by surface discontinuities shall, when necessary, be determined as follows: a) for isola