UTprocedure超声波探伤工艺.doc

The criterion of Taizhou CATIC Shipbuilding Heavy Industry CO.,LTD 泰州中航船舶重工有限公司企业标准 CO.,LTD 船舶钢焊缝超声波探伤工艺 Ship steel weld ultrasonic Testing Procedure 编 制： COMPLILED: 审 核： CONFIRMED 批 准： APPROVED Ultrasonic testing procedure 超声波检测工艺 general总则 1.1This procedure is applicable to ferrite steel welds with full-penetration welded joints and parent metal thickness is 14~50mm，to check the defect . 本探伤工艺适用于母材厚度为14~50mm的铁素体，全焊透钢焊缝超声波探伤检查，以检测焊缝内部的危害性缺陷。 This procedure prescribes ultrasonic testing method and quality classification for welded joint . 本工艺对焊接两侧的母材进行超声波探伤进行了规定事项及验收等级。 The personnel engaged in Ultrasonic testing shall hold UT technology qualification certificate which issued by national qualification organization (such as CCS)，UT Class II or UT Class III could operate 探伤操作人员需持有如中国船级社颁发的超声波检测资格证书，II级及以上资格证者，方可上岗操作。 2. normative standard and file 规范性引用文件 CB/T3559-94 Ship steel weld hand welding ultrasonic testing technical and quality classification 船舶钢焊缝手工焊超声波探伤工艺和质量分级 CCS，Non-destructive testing qualification and certification of personnel,2008 中国船级社《无损检测人员资格鉴定与认证规范》2008 A-pulse echo testing instrument A型脉冲反射式超声探伤系统性能测试方法 IACS Non-destructive testing of ship hull steel welds 国际船级社 船舶钢结构焊缝无损检测 LR rules for the manufacture, testing and certification of material July2009-chapter 12 劳氏材料制造、测试和认证规范2009版，第13章 2. The flaw detector 探伤仪 Apply digital ultrasonic detector, assigned frequency is 2.5-5MHZ, and provided with multicenter detect function. 使用数字式超声波探伤，其工作频率应具有2.5-5MHZ，具有多通道探伤功能。（Masters can-340、PXUT-211B） The systematic performance of the detector and probe shall be tested according to the regulation in JB/T9214. 探伤仪和探头的组合性能应满足JB/T9214的标准要求。 Normally the horizontal linear error of detector shall not be more than 1% and the vertical linear error shall not be more than 5%. 水平线性误差小于1%，垂直线性误差小于5%。 3. probe探头 3.1 The frequency of probe is 2.5~5MHZ,and sound axial line angle of alternation shall not be more than 2 degree. 采用探头，频率2.5~5