All nozzle flange and girth flange bolts shall be of studbolt type.
所有设备口法兰及翼缘法兰螺栓应为双头螺栓。
2
Girth flange bolting shall be of studbolt type, threaded full length, and at least M16 for flange of 600 mm and smaller inside diameter and at least M20 for over 600 mm inside diameter flange.
Usually there are 12 categories which are bolt , stud, screw, nut , self tapping screw, wood screw, gasket, retainer ring, pin, composite member, bolting, and soldering lamp.