Yunnan Provincial Standard of the People's Republic of China
Latest
DB53/T 419-2012
Scope
This standard specifies the technical requirements, test methods, defect assessment, test reports, etc. for ultrasonic longitudinal and transverse wave testing of in-use ultrahigh-pressure crystal kettle bodies. This standard is applicable to the ultra-high pressure crystal kettle body detection using pulse reflection ultrasonic testing method after the steel with inner and outer diameter ratio ≥ 50% is put into use.