无损检测磁粉检验工艺设计规程

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1、.* Co.,Ltd.焊缝检验规程3Rev.:0Page:1 of 7Title: PROCEDURE FOR MAGNETIC PARTICLE EXAMINATIONPROCEDURE FOR MAGNETIC PARTICLE EXAMINATION磁 粉 检验操 作 工艺规程 CONTROLLED 在控本 UNCONTROLLED 非在控本 COPY NO副本PREPARED BY DATE 日期：REVIEWED BY DATE 日期：APPROVED BY DATE 日期：* Co.,Ltd.焊缝检验规程3Rev.:0Page:2 of 7Title: PROCEDURE FOR

2、MAGNETIC PARTICLE EXAMINATIONDEMONSTRATION CERTIFICATIONThis is to certify that this procedure has been demonstrated on a test specimen with known defects to the satisfaction of the Authorized Inspector according to T-150 of ASME Code Section V, as required by Appendix 6 of Section Div.1. Test Speci

3、men No.: Demo. Report No.: NDE Level : AI: * Co.,Ltd.焊缝检验规程3Rev.:0Page:3of 7Title: PROCEDURE FOR MAGNETIC PARTICLE EXAMINATION 1. General 1.1 This procedure is applied to the magnetic particle examination of ferromagnetic materials and welds for ASME Code items. 1.2 The magnetic particle examination

4、 method is suitable for detecting cracks and other discontinuities on or near the surface in ferromagnetic materials. 1.3 This procedure is applied to wet continuous magnetization by yoke, which shall only be applied to detect discontinuities that are open to the surface of the part. 1.4 This proced

5、ure shall be demonstrated to the satisfaction of the AI prior to implementation. 2. Personnel 2.1 The NDE personnel who engage in magnetic particle examination shall be qualified and certified according to * Co.,Ltd.s “Written Practice for NDE Personnel Training, Examination, Qualification & Cer

6、tification(No.:QCD-011). 3. Description of Method3.1 In principle, the magnetic particle examination method involves magnetizing an area to be examined, and applying ferromagnetic particles to the surface. The particles will form patterms on the surface where cracks or other discontinuties cause dis

7、tortions in the normal magnetic field. These patterns are usually characteristic of the type of discontinuity that is detected. 3.2 The sensitivity of the magnetic particle examination is greatest for surface discontinuities and diminishes rapidly with increasing depth of discontinuities below the s

8、urface. Therefore, this method can only be used for detecting the discontinuities on or near the surface of the material or parts to be tested. 4. Magnetization Equipment and Calibration 4.1 The MT equipment to be used is Yoke, with Type CDX-4. 4.2 Calibration of Equipment4.2.1 Frequency of calibrat

9、ion: Each Magnetizing Equipment with an ammeter shall be calibrated at least once a year，or whenever the equipment has been subjected to a major electric repair, periodic overhaul or damage. If equipment has not been in use for a year or more, calibratioon shall be done prior to first use.4.2.2 Cali

10、bration for lifting power of the Yoke The lifting power will be calibrated with the methods of lifting a standard weight cake. Each alternating-current electromagnetic yoke shall have a lifting power of at least 10lb(44N). at the maximum pole spacing. Each direct-current electromagnetic yoke shall h

11、ave a lifting power of at least 40lb(177N). at the maximum pole spacing. 5. Examination Medium 5.1 The examination medium shall be the finely divided 1.概述 1.1 本规程适用 于ASME规X产品铁磁性材料和焊缝的磁粉检验。 1.2 磁粉检验方法适用于在铁磁性材料外表或其附近探测裂纹和其它不均匀性缺陷。 1.3 本规程适用于磁轭湿粉连续磁化法技术。此法仅适用于检出工件外表开口缺陷。 1.4 本规程在执行之前须通过演示，使AI审查满意。 2. 人