Standard Number: NB/T 42068-2016(NB/T42068-2016)
Chinese:螺杆膨胀机 主机、转子超声波探伤
English:Screw expander Ultrasonic flaw detection of mainframe and rotor
Effective Date:2016-12-01
Standard Applicability:This standard specifies the working fluid for the steam-water mixture (vapor-liquid two-phase) saturated steam or superheated steam and non-water low-boiling point working fluid screw expander host castings and rotor forgings for ultrasonic flaw detection of the basic requirements, flaw detection methods; and according to the results of ultrasonic flaw detection of castings and forgings defects in the records and quality rating methods, technical file management methods.
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