BS-ISO-24497-3-2007.pdf
《BS-ISO-24497-3-2007.pdf》由会员分享,可在线阅读,更多相关《BS-ISO-24497-3-2007.pdf(20页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS ISO 24497-3:2007 Non-destructive testing Metal magnetic memory Part 3: Inspection of welded joints ICS 25.160.40 ? Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:32 GMT+00:00 2008, Uncontrolled Copy, (c) BSI BS ISO 24497-3:2007 This Br
2、itish Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2007 BSI 2007 ISBN 978 0 580 55672 2 National foreword This British Standard is the UK implementation of ISO 24497-3:2007. The UK participation in its preparation was entrusted to Technical
3、 Committee WEE/46, Non-destructive testing. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a
4、 British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:32 GMT+00:00 2008, Uncontrolled Copy, (c) BSI Reference number ISO 24497-3:2007(E) IN
5、TERNATIONAL STANDARD ISO 24497-3 First edition 2007-11-01 Non-destructive testing Metal magnetic memory Part 3: Inspection of welded joints Essais non destructifs Mmoire magntique des mtaux Partie 3: Examen des assemblages souds BS ISO 24497-3:2007 Licensed Copy: London South Bank University, London
6、 South Bank University, Wed Jan 02 02:12:32 GMT+00:00 2008, Uncontrolled Copy, (c) BSI ii Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:32 GMT+00:00 2008, Uncontrolled Copy, (c) BSI iii Contents Page Foreword iv 1 Scope . 1 2 Basic principles 1 3 Inspect
7、ion conditions. 2 4 Inspection devices 2 5 Inspection planning 3 6 Inspection procedure . 4 7 Processing of results . 5 Annex A (normative) Inspection report 7 Annex B (informative) Example of stress concentration zones defined by a device with digital indication of the magnetic field intensity. 9 A
8、nnex C (informative) An example of stress concentration zones defined by the device having recorder and scanner. 11 BS ISO 24497-3:2007 Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:32 GMT+00:00 2008, Uncontrolled Copy, (c) BSI iv Foreword ISO (the Inter
9、national 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
10、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 st
11、andardization. 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
12、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
13、all such patent rights. ISO 24497-3 was prepared by the International Institute of Welding, Commission V, Quality control and quality assurance of welded products, recognized as an international standardizing body in the field of welding in accordance with Council Resolution 42/1999. Requests for of
14、ficial interpretations of any aspect of this part of ISO 24497 should be directed to the ISO Central Secretariat, who will forward them to the IIW Secretariat for an official response. ISO 24497 consists of the following parts, under the general title Non-destructive testing Metal magnetic memory: P
15、art 1: Vocabulary Part 2: General requirements Part 3: Inspection of welded joints BS ISO 24497-3:2007 Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:32 GMT+00:00 2008, Uncontrolled Copy, (c) BSI 1 Non-destructive testing Metal magnetic memory Part 3: Ins
16、pection of welded joints 1 Scope This part of ISO 24497 specifies the general requirements for the application of the metal magnetic memory inspection method (MMM inspection) as a non-destructive testing method for quality assurance of welded joints of pressurized components. This part of ISO 24497
17、may be applied to welded joints in any type of products, pipelines, vessels, equipment, and metal constructions, as agreed with the purchaser. The terms and definitions for the process are contained in ISO 24497-1, and the general requirements of the process are in ISO 24497-2. 2 Basic principles 2.
18、1 inspection is based on measurement and analysis of the distribution of self-magnetic-leakage fields (SMLF) in the material of welded joints reflecting their technological history. Natural magnetization, induced during the welding process in the Earths magnetic field, is used for the inspection. 2.
19、2 inspection permits the detection of mechanical stress concentration zones (SCZ) and gives recommendations for additional non-destructive inspections in critical zones of vessels, pipelines, equipment, and construction welded joints. 2.3 inspection is complementary in its capability to other well-k
20、nown non-destructive testing methods (ultrasonic inspection, magnetic particle inspection, liquid penetrant inspection, and hardness testing). 2.4 inspection allows the testing of welded joints of any size and configuration (butt, tee, fillet, lap, edge, intermittent, etc.) regardless of weld materi
21、al thickness on all types of ferromagnetic and austenitic steels and alloys, as well as on cast irons. 2.5 inspection may be carried out on the original weld after construction, during operation, or after repair. 2.6 The following conditions can be found during MMM inspection: residual stress concen
22、tration zones caused by welding, and their distribution along the welded joint; zones of probable location of all types of micro- and macro-defects (pores, slag inclusions, discontinuities, cracks, ruptures). Defect classification by magnetic parameters is carried out following special testing techn
23、iques for a specific welded joint. BS ISO 24497-3:2007 Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:12:32 GMT+00:00 2008, Uncontrolled Copy, (c) BSI 2 2.7 MMM inspection can be used for inspection of the following: the degree of quality degradation of weld
24、s by defects, and presence of developing defects; the quality of welded joints at time of certification, choice, and optimization of welding technology. 2.8 The MMM inspection temperature range is from 20 C to +60 , limited only by the conditions of the operators and inspection tools normal operatio
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BS ISO 24497 2007
链接地址:https://www.31doc.com/p-3751458.html