外文翻譯--球墨鑄鐵的無損傷檢測(cè)-全文預(yù)覽
【正文】 ining information as item No./type, inspector/date, examination technique, reference to specific CUSTOMER control instruction, equipment, examination results with information as mentioned in section and relevant sketches. Final report must be kept by manufacturer for a minimum of 10 years. 。24mm Couplant: Ultrasonic jelly, oil or paste. Surface condition General requirements to the surface finish of the specific control areas are described in the purchasing specification. The specified scanning surfaces in the control instruction shall have a condition, which ensures full coupling between the ponent and the sole of the probe. Possible irregularities may be ground flush to the surrounding surfaces. Calibration Digital ultrasonic instruments (. Krautkr228。24 mm B1S, 1 MHz, 248。fblatt SEP 1924 ? EN 126863 ? ASME Sec. V, Article 7 NDTpersonnel Personnel carrying out NDT must as a minimum have qualifications corresponding to one of the following certification schemes: ? EN 473/Nordtest Doc. Gen. 010 ? SNT TC1A ? EN 473 ? ASME Sec. VIII, Div. 1, App. 6 (for magic particle only). The quality department of THE CUSTOMER shall evaluate the documentation for qualifications before the work is menced. Normally THE CUSTOMER will require qualifications corresponding to level II, unless job descriptions and organisation charts for the inspection department or testing firm allows the use of level I personnel. For the surface method wet magic particle, certificates of petency according to ASME Sec. VIII, Div. 1, Appendix 6 are accepted. Calibration All NDTequipment shall be subjected to a documented system for calibration and verification according to present national or international codes. Validity This procedure is valid for examination of both machined and unmachined cast iron items. Rough surfaces on unmachined items may be smoothly ground to the extent necessary to carry through the examination. Visual examination All cast surfaces, which on the final item are to protrude unmachined, shall be free of surface breaking discontinuities as described in table 6. The table is based on the European norm EN 12454 which describes the use of reference parators. All unacceptable indications shall be marked on the surface of the item. Location and size of unacceptable indications are recorded. Indications, which subsequently may be removed by machining or by repair grinding according to table 4, shall not be recorded. Reporting All examinations shall be finished with a final report containing information as item No./type, inspector/date, examination results with information as mentioned in section and relevant sketches. Ultrasonic examination Equipment Ultrasonic instrument type pulseecho with presentation of Ascans on a CRTscreen or LCDdisplay. The instrument shall fulfil following requirements: ? The time base shall be adjustable and permit selection of any range (screen length) within the working range of the instrument. ? The instrument shall have an amplification range of at least 80 dB. The amplification must be adjustable in max. 2 dB steps with an accuracy of 1 dB. ? The screen height linearity shall be better than 2%. ? The instrument shall be capable to work within the frequency ra
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