This Part of NB/T 47013 specifies the pressure equipment shall adopt ultrasonic testing method and quality grading requirements in which shape A pulse reflectio

This part of NB/T 47013 specifies the magnetic particle testing methods and quality grading requirements for the pressure equipment weld and its raw materials a

This Part of NB/T 47013 specifies the inspection methods and evaluation rules for even wall thickness reduction of magnetic materials such as carbon steel, low

This Part of NB/T 47013 specifies the liquid penetrant testing method and quality grading of pressure Equipment. This Part applies to the testing of surface-bre

This standard specifies the processing, fabrication and installation requirements for the material, concrete construction and ordinary rebar, prestressing syste