word* Co.,Ltd.焊缝检验规程6Rev.:0Page:1 of 9Title: ULTRASONIC EXAMINATION PROCEDUREULTRASONIC EXAMINATION PROCEDURE超声波检验工艺规程 CONTROLLED 在控本UNCONTROLLED 非在控本 COPY NO 副本编号：PREPARED BY 编制： DATE 日期：REVIEWED BY 审核： DATE 日期：APPROVED BY 批准： DATE 日期：更多免费资料下载请进：.55top.好好学习社区* Co.,Ltd.焊缝检验规程6Rev.:0Page:2 of 9Title: ULTRASONIC EXAMINATION PROCEDUREDEMONSTRATION CERTIFICATIONI hereby certify that this procedure has been demonstrated on a test specimen with known defects to the satisfaction of the Authorized Inspector according to the ASME Code Section V, T-150 as required by Section Div.1. UW-53 and Appendix 12. Test Specimen No.: Demo. Report No.: NDE Level : AI: * Co.,Ltd.焊缝检验规程6Rev.:0Page:3 of 9Title: ULTRASONIC EXAMINATION PROCEDURE1. SCOPE OF APPLICATIONThis procedure is piled in accordance with the requirements of ASME Code Section V and Section Division 1. 1.2 In accordance with this procedure a pulse-echo type of ultrasonic instrument shall be used for Code product examination. Single probe, angle beam scanning shall be the principal method, if necessary, straight beam scanning may also be used.1.3 This procedure is applicable for ultrasonic examination of butt-welded, full penetrated joint in wrought ( rolled, drawn, forged or extruded) material with thickness equal to or greater than 5/16in.(8mm) detecting, locating and evaluating the reflectors from the weld metal, heat affected zone and base metal adjacent the weld.1.4 Ultrasonic examination of single side welded partial penetrated welds and austenitic steel welds are not considered to be within the scope of this procedure.1.5 Unless other procedure has been approved and accepted that may specify particular requirements, ultrasonic examination relating to method, evaluation, and detailed technique and requirement shall be in accordance with this procedure.2. NDE PERSONNEL2.1 NDE personnel shall be qualified and certified according to *S Written Practice QCD-011 based on SNT TC-IA (Current Code Accepted Edition).3. GENERAL EXAMINATION REQUIREMENTS3.1 Examination coverage The volume shall be examined by moving the search unit over the examination surface so as to scan the entire examination volume .Each pass of the search unit shall overlap a minimum of 10% of the transducer (piezo-electric element) dimension perpendicular to the direction of the scan.3.2 Speed of Search Unit MovementsThe speed of search unit movement for examination shall not exceed 6 in./sec (150mm/sec.)3.3 Recording LevelAll reflections from uncorrected areas having responses that exceed 50% of reference level shall be recorded. This record shall locate each area, the response level, the dimensions, the depth below the surface, and the classification.4. ULTRASONIC INSTRUMENT, SEARCH UNIT AND PARAMETERS4.1 Ultrasonic Instrument A pulse-echo type of ultrasonic instrument shall be used. The following instruments are remended in examination.1.适用X围本规程按ASME 第V卷和第第1分册要求编制。按规程对规X产品的检查用脉冲反射式超声波探伤仪。以单斜探 头扫查为主要方法，必要时可辅以直探头扫查。本规程适用于板厚8mm钢制压力 容器全焊透对接焊缝的超声检查(包括焊缝金属和热影响区)。本规程不适用于单面焊部分焊透焊缝的检查，也不适用于奥氏体钢焊缝的的检查。除非其他程序经批准、有关具体要求经认可，UT有关方法、评定、要求应按本规程。2.无损探伤人员无损探伤人员应按本公司根据SNT-TC-IA(现行版)制定的“NDE人员培训、考试、资格鉴定和认证的实施细则”进行资格鉴定和认证。3.一般探伤要求探测X围 应通过探头在探测面的移动，使焊缝全体积均受超声束扫查。探头的扫查路径应至少重叠探头横向宽度的10%探头移动速度 探伤时，探头移动速度应不大于150mm/s。记录水平 凡波高超过50% DAC基准线而未予返修的讯号均应记录在案。4.超声仪、探头和参数4.1 超声仪 应使用下列脉冲反射式超声仪：Instrument TypeManufactured by仪器型号制造单位CTS-26Shantou, ChinaCTS 26某某超声仪器厂更多免费资料下载请进：.55top.好好学习社区* Co.,Ltd.焊缝检验规程6Rev.:0Page:4 of 9Title: ULTRASONIC EXAMINATION PROCEDURESearch Unit typeBeam Angle()FrequencyManufactured by2.5P 8x12450Shantou, China2.5P 8x12560Shantou, China2.5P 8x12630Shantou, China2.5P 8x12680Shantou, ChinaWall Thickness (mm)Beam Angle ()K Value (tg)8-25720-63025-46680-56046630-450壁厚(mm)折射角()K 值 (tg)8-25720-63025-46680-56046630-450探头折射角()频率制造单位2.5P 8x12450某某超声仪器厂2.5P 8x12560某某超声仪器厂2.5P 8x12630某某超声仪器厂2.5P 8x12680某某超声仪器厂4.2 Search UnitFor straight beam, the diameter of transducer shall be 14mm-25mm. For angle beam, an angle shall be selected as appropriate for the configuration being examined. The following search units are remended to be used in examination:The range of angle is remended as following:4.3 Frequency Generally, the frequency of 2.5MHz shall be used. For the thinner plate, 5MHz may be used.4.4 Screen Height linearity The ultrasonic inst