压力容器何时进行无损检测以及无损检测方法的选择（The selection of nondestructive testing and nondestructive testing methods for pressure vessels）.docVIP

压力容器何时进行无损检测以及无损检测方法的选择（The selection of nondestructive testing and nondestructive testing methods for pressure vessels） In order to ensure the safe quality of the pressure vessel, the raw materials used in the pressure vessel begin with non-destructive testing for quality control. The raw materials used in the pressure vessels include metal sheets, pipes, bars, forgings and castings, and different non-destructive testing techniques shall be used according to the manufacturing process and geometry of these materials. 1.1 nondestructive testing of metal sheets for pressure vessels The pressure vessels are usually made of steel plate, stainless steel plate, double-phase steel plate, aluminum and aluminum alloy sheet, titanium and titanium alloy sheet, etc., mainly used in the manufacturing of pressure vessel cylinder and seal head. All pressure vessel manufacturing standard or standard, in the highly toxic, corrosive, high pressure and other pressure vessels under strict working conditions, its metal plates must be checked by the ultrasound. The probe used for ultrasonic detection is single crystal or double crystal probe, mainly used to detect the lamination, white point and crack of metal plate in the process of smelting and rolling. Large area inspection of steel plates (including border area detection and area detection) is usually carried out with a water-filled coupling probe. 1.2 nondestructive testing of pipe material for pressure vessels 1 P % M3 u * e9@ : s vwww. 3 pressure vessel pipe material includes seamless steel tube, welded steel tube, copper and copper alloy tube, aluminum and aluminum alloy tube, titanium and titanium alloy pipe, etc. # F9 l: o-v# Y5 z 3d network technology BBS is mainly used for heat exchanger production. 7, n $h * f4 Seamless steel pipe is tested by liquid immersion method or contact method, which mainly detects longitudinal defects. The liquid immersion method detects the use of wire focusing or point clustering 1 l1 x. b, k, A7