1, Products: WN, SO , BL , TH, LJ , SW 2, Painted: black, varnish, antirust ... , CE, I ANSI B16.5 Class150, 300, 600, 900, 1500II JIS 5K, 10K, 16K, 20K (PL, SO, BL) III DIN2573, 2572 ... , 2631, 2576, 2632, 2633, 2543, 2634,2545(PL,SO,WN,BL,TH) IV HG20592-97(HG20593-97-HG20614-97) V ... ) IX JB1157-82-JB1160-82, JB4700-2000-JB4707-2000 CS Flange