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1、We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden. Copyright ABB Alstom Power Ltd 2000KWE-IS 40524132A P1ABB Alstom Power HTWT 600 040Responsible department Take over depar
2、tment Revision Doc.-type: File no.:HGE - PAPrepared: Checked Approved Language Page00-03-31 Th. Ebner 00-03-31 R. Schibli 00-03-31 M. Foerster en 1/6Valid for: Derived from Replaces DatasetHG new HTWT_600040_0.DOCTest Instruction 试验指导Magnetic Particle Inspection of welds according ASME regulations 焊
3、缝磁粉探伤Text PA-Welds Document-No. HTWT 600 040 Content: 目录1 Area of Application 应用范围 12 Scope 范围 13 Reference Documents 参考文件 24 General Examination Requirements 通用检验要求 34.1 Personnel qualification 人员资格 34.2 Surface condition 表面状态 35 Extending of Spot Check 抽检的比例增加 36 Method of Testing 试验方法 37 Type of
4、Magnetization, Equipment and Materials 磁化类型、设备、材料 38 Examination Coverage 检验覆盖度 59 Preparation and Cleaning of Areas to be tested 被检验区域的准备和清洁 510 Technique 技术 510.1 Yoke Technique 磁轭技术 510.2 Prod Technique 触头技术 511 Performance 性能 612 Evaluation of Indications 磁痕评定 613 Acceptance Standards 验收标准 714 R
5、epair of Defects 缺陷修补 715 Calibration Equipment 校准设备 716 Post Examination Cleaning 检验后的清洁 817 Review 审查 818 Report 报告 819 Storage and Distribution 储存及分发 81 Area of ApplicationThis procedure is to be used for magnetic particle examination (MT) of welding joints when ASME Code applies or is specified
6、as reference. 本程序适用于应用 ASME 规范或以 ASME 规范为参考的焊缝磁粉探伤。2 Scope 范围This procedure outlines the inspection method and acceptance standard for detecting flaws and discontinuities in welds and base metal of ferromagnetic material by magnetic particle examination.本磁粉探伤程序包括磁粉探伤法检验焊缝和铁磁材料制成的母材中的缺陷和不连续性的检验方法及验收标
7、准。Revision Language Page- en 2/6 HTWT 600 0403 Reference Documents 参考文件- ASME V, Art. 7 (1995),- ASME VIII, Div. 1, App. 6 (1995),- ASNT SNT-TC1A 1992 edition.4 General Examination Requirements 通用检验要求4.1 Personnel qualification 人员资格MP II as per SGZP, M2 as per DGZfP, MT 2 as per EN 473, Level II as
8、per SNT-TC-1A.Other qualifications must be approved by ABB. 其他等级资格必须获得 ABB 的批准4.2 Surface conditionThe surface quality must be in a matter that there is no negative influence on the inspection.表面状态应不影响检验。The surface of the weld and the nearby surface up to 25 mm (1 in.) shall be clean and free from
9、spatters, loose scale, excessive rust and dirt. 焊缝表面及周围 25 mm (1 in.)的区域应干净无飞溅物、疏松的氧化皮和过多的锈蚀和灰尘。5 Extending of Spot Check 抽检比例的增加If only spot checks are required according the drawing following increase of the scope of examination are required if one or more inadmissible defects are detected:如果图纸上仅要
10、求做抽检，则在检查出一处或多处超标缺陷后应按照下述要求增加抽检的比例：Spot check 抽检 % 10 20 25 501st 增加抽检比例 % 20 40 50 1002nd 增加抽检比例% 40 100 1003rd 增加抽检比例% 100Should inadmissible defects be detected during spot checks, the 1st, 2nd or 3rd becomes into effect until thelast extension test indicates no inadmissible defects.如抽检中发现超标缺陷，应按
11、照 1st, 2nd, 3rd 增加抽检比例直到未发现超标缺陷为止。6 Method of Testing 试验方法The magnetic particle examination shall be done by the continuous method and wet method, means the magnetizing current remains on while the examination medium is being applied and while excess of the examination medium runs off. In principle,
12、 this method involves magnetizing an area to be examined, and applying ferromagnetic particles within a fluid carrier (the examination medium) to the surface. The particles will form patterns on the surface where cracks and other discontinuities cause distortion in the normal magnetic field. 应用湿法连续技
13、术进行磁粉检验，这意味着在施加检验介质和多余的检验介质流掉的过程中磁化电流一直不间断。其原理是使被检验区域磁化，并将载液（检验介质）中的铁磁性粉末施加到此区域的表面上，此时表面上有裂缝及其他不连续性的地方因使正常磁场产生畸变而使磁粉构成一定的图形。The usage of dry magnetic powder must be approved by ABB Alstom Power. 干磁粉的使用应获得 ABB Alstom Power 的批准。7 Type of Magnetization, Equipment and Materials 磁化类型、设备和材料- Yoke magnetiz
14、ation or magnetization using prods shall be used for detecting discontinuities.应采用磁轭磁化或触头磁化法检测不连续性。- The magnetizing equipment shall be either a 磁化设备可以是：- C-shaped electromagnet yoke, which induce a magnetic field between the poles (legs) and is used for local magnetization. The yoke may have articu
15、lated legs to allow to be adjusted to contact irregular surfaces or two surfaces that join at an angle.and / orRevision Language Page- en 3/6 HTWT 600 040C 字形的电磁铁磁轭，载两个极头（触头）间感生磁场，并用作局部磁化。磁轭可能有活络关节的头子（极），以有利于与圆弧 形表面或有一定夹角的两个表面的接触良好。和/ 或- Prods including power transformer. The prod tips should be alu
16、minum, copper braid or copper pads. Open-circuit voltage should not exceed 25V. 触棒。触棒触头应是铝、铜编织物或铜极板。开路电压不超过 25V。- The magnetizing force of a yoke (created by AC, half-wave rectified AC or full-wave rectified AC) shall be tested as per paragraph 15 herein. 一个磁轭的磁化力（由 AC, 半波整流 AC 或全波整流 AC 产生的）应按照第 15 段进行测试。- The magnetic strength of the prod magnetizing should be adjusted according paragraph 15. herein. 触棒磁化的磁化强度应按照第 15 段进行调整。- The magnetic particles should be such that maximum co
