1, Products: WN, SO , BL , TH, LJ , SW 2, Painted: black, varnish, antirust oil 3, Qualification: ... , 2576, 2632, 2633, 2543, 2634,2545(PL,SO,WN,BL,TH) IV HG20592-97(HG20593-97-HG20614-97) V HG20615-97 ... -88) IX JB1157-82-JB1160-82, JB4700-2000-JB4707-2000 flange