GB/T 7233.1-2009 Translated English of Chinese Standard. (GBT 7233.1-2009, GB/T7233.1-2009, GBT7233.1-2009): Steel castings - Ultrasonic examination - Part 1: Steel castings for general purposeshttps://www.chinesestandard.net, 30. mai 2015 - 40 sider This Part of GB/T 7223 specifies the requirements for the ultrasonic examination of steel castings (non-austenitic steel) for general purposes, and the methods for determining internal discontinuities by the pulse-echo technique. |
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A-scan accordance with GBT Angle beam probe angle of incidence angle probes Appendix applied backwall echo calibration block contact transfer losses coupling loss coupling medium decibels Dimension of discontinuity Discontinuities with Measurable Discontinuity Range discontinuity The discontinuity Discontinuity without Measurable Echo dynamics echo from plate equivalent flat-bottomed hole examination procedure extension of discontinuity Figure C.1 flat-bottomed hole diameter GB/T Half-value dimension Individual Discontinuity JB/T maximum echo height measurable dimensions millimeters near-field length Non-destructive Testing Permissible limits planar discontinuities Probe movement Probe position Range setting Reduction of backwall reference block Scanning position sensitivity setting Shenyang side-drilled hole diameter Sizing of discontinuities sound path length sound-beam diameter DF sound-beam path Special rim zone Steel Castings technique test object test sensitivity test surface thickness t1 through-wall direction transfer correction Transverse waves type of discontinuity Typical indication ultrasonic examination Ultrasonic Inspection variation in transfer volumetric discontinuities wall thickness