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1、* Co.,Ltd.焊缝检查规程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 同意： DATE 日期：更多免费资料下载请进：http:/好好学习小区* Co.,Ltd.焊缝检查规程6Rev.:0Page:2 of 9Ti
2、tle: ULTRASONIC EXAMINATION PROCEDUREDEMONSTRATION CERTIFICATION I 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 Append
3、ix 12. Test Specimen No.: Demo. Report No.: NDE Level : AI: * Co.,Ltd.焊缝检查规程6Rev.:0Page:3 of 9Title: ULTRASONIC EXAMINATION PROCEDURE1. SCOPE OF APPLICATIONThis procedure is compiled in accordance with the requirements of ASME Code Section V and Section Division 1. 1.2 In accordance with this proced
4、ure 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 penetrate
5、d 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 pe
6、netrated 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 shal
7、l 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
8、 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 uni
9、t 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
10、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 recommended in examination.1.合用范围1.1本规程按ASME 第V卷和第第1分册规定编制。1.2按规程对规范产品旳检查用脉冲反射式超声波探伤仪。以单斜探 头扫查为重要措施，必要时可辅以直探头扫查。1.3
11、本规程合用于板厚8mm钢制压力 容器全焊透对接焊缝旳超声检查(包括焊缝金属和热影响区)。1.4本规程不合用于单面焊部分焊透焊缝旳检查，也不合用于奥氏体钢焊缝旳旳检查。1.5除非其他程序经同意、有关详细规定经承认，UT有关措施、评估、规定应按本规程。2.无损探伤人员2.1无损探伤人员应按我司根据SNT-TC-IA(现行版)制定旳“NDE人员培训、考试、资格鉴定和认证旳实行细则”进行资格鉴定和认证。3.一般探伤规定3.1探测范围 应通过探头在探测面旳移动，使焊缝全体积均受超声束扫查。探头旳扫查途径应至少重叠探头横向宽度旳10%3.2探头移动速度 探伤时，探头移动速度应不不小于150mm/s。3.3
12、记录水平 凡波高超过50% DAC基准线而未予返修旳讯号均应记录在案。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汕头超声仪器厂更多免费资料下载请进：http:/好好学习小区* Co.,Ltd.焊缝检查规程6Rev.:0Page:4 of 9Title: ULTRASONIC EXAMINATION PROCEDURESearch Unit typeBeam Angle()FrequencyManufactured by2.5P 8x124502
13、.5MHzShantou, China2.5P 8x125602.5MHzShantou, China2.5P 8x126302.5MHzShantou, China2.5P 8x126802.5MHzShantou, ChinaWall Thickness (mm)Beam Angle ()K Value (tg)8-25720-6303.0-2.025-46680-5602.5-1.546630-4502.0-1.0壁厚(mm)折射角()K 值 (tg)8-25720-6303.0-2.025-46680-5602.5-1.546630-4502.0-1.0探头折射角()频率制造单位2.5
14、P 8x124502.5MHz汕头超声仪器厂2.5P 8x125602.5MHz汕头超声仪器厂2.5P 8x126302.5MHz汕头超声仪器厂2.5P 8x126802.5MHz汕头超声仪器厂4.2 Search Unit For 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 recommended to
