ASME标准超声检测通用工艺规程 |
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Rev.A |
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| Employer : | manziSONILS LDA |
| 跷跷板英文Engineer : | SCOTT WILSON LTD, UK |
| Contractor : | CHINA HARBOUR ENGINEERING CO你好 英文., LTD. |
| Subcontractor: | PETRO-OFFSHORE ENGINEERING |
Issue Status | | | | | | | cros | B | 30May07 | App. | | | | | A | 16Feb07 | Draft | | | | | anthony hamilton | admit的用法 Rev. | Date | Description | Prep’d | Chk’dwouldyoulike的用法 | App’d | ICE REF. | | zielonka | | | | | | |
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CONTENTS
1. SCOPE OF APPLICATION
1.1 This procedure is compiled in accordance with the requirements of ASME Code Section V and Section Ⅷ Division 1.
1.2 In accordance with this procedure a pul-echo type of ultrasonic instrument shall be ud for Code product examination. Single probe, angle beam scanning shall be the principal method, if necessary, straight beam scanning may also be ud.
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 ba 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 NJBST’S Written Practice QCD-011 bad on SNT –TC-IA (Current Code Accepted Edition).
3. GENERAL EXAMINATION REQUIREMENTS
3.1 Examination coverage
The volume shall be examined by moving the arch unit over the examination surface so as to scan the entire examination volume .Each pass of the arch 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 speed of arch unit movement for examination shall not exceed 6 in./c (150mm/c.)
3.3 Recording Level
All reflections from uncorrected areas having respons that exceed 50% of reference level shall be recorded. This record shall locate each area, the respon level, the dimensions, the depth below the surface, and the classification.
4. ULTRASONIC INSTRUMENT, SEARCH UNIT AND PARAMETERS
4.1 Ultrasonic Instrument
A pul-echo type of ultrasonic instrument shall be ud. The following instruments are re
commended in examination.
araleInstrument Type | Manufactured by |
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For straight beam, the diameter of transducer shall be 14mm-25mm. For angle beam, an angle shall be lected as appropriate for the configuration being examined. The following arch units are recommended to be ud in examination:
