標準號：DIN EN ISO 17640-2011
中文標準名稱：焊接的無損檢測.超聲波檢測.技術,檢測水平,和評定(ISO 17640-2010);德文版本EN ISO 17640-2010
英文標準名稱：Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment (ISO 17640:2010); German version EN ISO 17640:2010
標準類型：J33
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：J33
國際標準分類號：25.160.40
適用范圍：This International Standard specifies techniques for the manual ultrasonic testing of fusion welded joints in metallic materials equal to and above 8 mm thick which exhibit low ultrasonic attenuation at object temperatures from 0°C to 60°C. It is primarily intended for use on full penetration welded joints where both the welded and parent material and ferritic.Where material-dependent ultrasonic values are specified in this International Standard, they are based on steels having an ultrasonic sound velocity of (5 920 ± 50) m/s for longitudinal waves and (3 255 ± 30) m/s for transverse waves.This International Standard specifies four testing levels, each corresponding to a different probability of detection of imperfections. Guidance on the selection of testing levels A, B and C is given in Annex A.This International Standard specifies that the requirements of testing level D, which is intended for special applications, be in accordance with general requirements. Testing level D can only be used when defined by specification. This includes tests of metals other than ferritic steel, tests on partial penetration welds, tests with automated equipment, and tests at object temperatures outside the range 0 ℃ to 60 ℃.This International Standard can be used for the assessment of indications, for acceptance purposes, by either of the following techniques:a) evaluation based primarily on length and echo amplitude of the signal indication;b) evaluation based on characterization and sizing of the indication by probe movement techniques.The techniques used shall be specified.