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NB/T 42068-2016 Active
NB/T 42068-2016 Screw Expansion Machine Main Unit, Rotor Ultrasonic Probing
Abstract
This standard specifies the basic requirements and inspection methods for ultrasonic testing of the main cast steel parts and rotor forgings of screw expanders using refrigerant mixtures (vapor-liquid two-phase), saturated steam or superheated steam, as well as non-water low-boiling point refrigerants; and the methods for defect recording and quality grading of castings and forgings based on the results of ultrasonic testing, and the management methods of technical files.
General Product Information
| Document Type | Industry standards-Energy |
|---|---|
| Standard Status | Active |
| Standard Code | NB/T 42068-2016 |
| CCS | Other power generation equipment |
| ICS | Gas turbines, steam turbines, and steam engines |
| Implement Date | 2016-12-01 |
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