无损探伤通用技术规范(中英文).doc

东方电机股份有限公司DONGFANG ELECTRICAL MACHINERY CO., LTD.Rev: 0东方电机股份有限公司DONGFANG ELECTRICAL MACHINERY CO., LTD 无损探伤通用技术规范NDT GENERAL TECHNOLOGY PROCEDURE东方电机股份有限公司DONGFANG ELECTRICAL MACHINERY CO., LTD.Rev: 0 编 制Issued by刘文高、王麟校 核Checked by邓伟勇审 定Approved by吴天茂2003年9月18日无损探伤通用技术规范NDT GENERAL TECHNOLOGY PROCEDURERev: 0 目 录INDEX1锻件超声波探伤规范……………………………………………………1Ultrasonic Inspection Procedure for Forging ……………………………12焊缝超声波探伤规范……………………………………………………5Ultrasonic Inspection Procedure for Welds ……………………………53磁粉探伤规范……………………………………………………………15Magnetic Particle Inspection Procedure…………………………………154液体渗透探伤规范………………………………………………………26Liquid Penetrant Inspection Procedure …………………………………265射线探伤规范……………………………………………………………34Radiographic Inspection Procedure ……………………………………34锻件超声波探伤规范Ultrasonic Inspection Procedure for ForgingPAGE: 4 of 481. 锻件超声波探伤规范Ultrasonic Inspection Procedure for Forging1.1 适用范围 SCOPE本规范适用于JB4730-94《压力容器无损检测》标准第二篇或ASTM A388规定的钢锻件超声波探伤。

This procedure covers ultrasonic inspection for the iron forged products in accordance with the JB4730-94《Nondestructive testing of Pressure Vessels》Section Ⅱ or ASTM A388.1.2 设备和人员 APPARATUS AND PRESONNEL1.2.1 设备 APPARATUS超声波探伤仪采用A388 4.1条规定的A型超声波探伤仪探头晶片直径Φ14~Φ29mm，最大有效面积为635mm2，探头频率采用2~5MHz，必要时也可采用1或1.25MHzAn ultrasonic pulsed reflection type A of instrument shall be required in accordance with part 4.1 of ASTM A388. The probe shall have a maximum active area of 635mm2 with the diameter of 14~29mm max and the probe frequency shall be 2 to 5MHz. If necessary, a frequency of 1MHz or 1.25MHz may be employed, and the areas to be inspected shall be defined on the test report.1.2.2 超声波探伤仪应根据ASTM E317作垂直、水平和线性的校验，其周期应不超过一年。

Ultrasonic examination equipment shall be calibrated in accordance with ASTM E317 for screen height, horizontal and amplitude linearity. The calibrations shall be at a frequency not to exceed one year.1.2.3 人员 PERSONNEL所有从事超声波探伤的人员都应按照GB9445-88《无损检测人员资格鉴定通则》或SNT-TC-1A推荐的方法进行培训和资格鉴定All personal performing ultrasonic examination shall be trained and qualification according to the GB9445-88《Rules for Qualification and Certification of NDT Personnel》 or SNT-TC-1A recommended method.1.3 检测时机 TESTING STAGE超声波检测应在锻件最终热处理之后，粗加工状态下进行。

The ultrasonic examination for iron forged products shall be performed in final heat treatment and rough machined condition.1.4 表面制备 SURFACE PREPARATION1.4.1 所有探伤表面应加工到Ra≤6.3μm，锻件被检表面应无任何污物The roughness of all surfaces to be examined shall not exceed 6.3 micrometer. The surface of the forging to be tested shall free and form extraneous dirt.1.5 耦合剂 COUPLANT甘油、ULTRAGEL高温耦合剂、金属专用浆糊、机油、水或相当的物质可作为检查用耦合剂校正与检验应使用相同的耦合剂Glycerin, ULTRAGEL, metal paste, oil, water or equivalent, shall be used as couplant for these inspection. The same couplant shall be used for calibration and testing.1.6 扫查技术 SCANNING TECHNIQUE1.6.1使超声波传入工件应涂刷适量的耦合剂。

探头应紧贴探伤面移动Sufficient proper couplant shall be used to permit for sound wave transmission into the material being examined. The search unit shall be moved in intimate contact with examination surface.1.6.2 扫查速度不超过150mm/s相邻两次扫查之间应有一定的重叠，重叠宽度至少为探头晶片尺寸的15%The rates of scanning not exceed 150mm/s. Each pass of the search unit shall overlap the previous pass by a minimum of 15% of the transducer element dimension perpendicular to the direction of scanning.1.7 仪器校准 CALIBRATION OF EQUIPMENT1.7.1纵波探伤采用底面反射法校准仪器，第一次底波调至屏高和屏宽的75%。

To perform the longitudinal technique examination ultrasonic equipment calibration on the back reflection. Adjust the first response to 75% of full screen height (FSH) and full screen width (FSW).1.7.2 仪器在下列时间应重新根据校正标准Equipment shall be calibrated checked against a calibration standard for proper functioning and gain setting at the following intervals：——每次检查的开始和结束；At the beginning and end of each examination.——每四个小时；Every four hours——探伤更换人员时；When examination personnel are changed.——怀疑仪器出现故障时；At any time when an equipment malfunction is suspected.——当断面厚度或直径有较大改变时；When the section thickness or diameter are changed.——探头、耦合剂、仪器调整或者扫查速度有变化时。

When the search unit, couplant, setting of equipment or the rate of scanning are changed.1.8 验收 ACCEPTANCE除非在产品图纸上另有说明，否则应按下述验收Unless otherwise noted on a product drawing, the following acceptance criteria shall apply.1.8.1 用直探头检查 Examination with normal bundle存在任何下列情况的不连续将拒收：The discontinuities will be refused in any of the following situation:——任何类型的线性缺陷；Every kind of the linear discontinuities;——底波衰减超过95%；Loss of depth echo superior to 95%;——波幅超过Φ4mm当量的任何显示两个显示范围之间的距离小于一个单独缺陷的大小）；Any indication with an amplitude higher than the obtained of a bore with 4mm of the diameter (if the distance between the limits of two indicati。