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无损检测试题教材系列之UT超声检测工艺规程（最
通用版）
NJBST Co.,Ltd. QCD-013 Rev.:0 Page:1 of 12 Title: ULTRASONIC EXAMINATION PROCEDURE ULTRASONIC 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：
NJBST Co.,Ltd. QCD-013 Rev.:0 Page:2 of 12 Title: ULTRASONIC EXAMINATION PROCEDURE DEMONSTRATION CERTIFICATION 更多资料：
无损检测招聘网 piled in accordance with the requirements of ASME Code Section V and Section Ⅷ 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
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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 PERSONNEL 2.1 NDE personnel shall be qualified and certified according to NJBSTS Written Practice QCD-011 based on SNT TC-IA (Current Code Accepted Edition). 3. GENERAL EXAMINATION REQUIREMENTS 3.1 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 Movements The
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speed of search unit movement for examination shall not exceed 6 in./sec (150mm/sec.) 3.3 Recording Level All 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 PARAMETERS 4.1 Ultrasonic Instrument A pulse-echo type of ultrasonic instrument shall be used. The following instruments are recommended in examination. Instrument Type CTS-26 1.适用范围 1.1 本规程按 ASME 第 V 卷和第Ⅷ第 1 分册要求编制。
1.2 按规程对规范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。 1.3 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)。
1.4 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。
1.5 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 2.1 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
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