Standards: ANSI DIN EN JIS and BS ect. Type:SO, WN, BL, PL, THRD flange, Keep to the principle of equality and mutual benefit. Materials ... ,Blind flange,Socket Welding flange,Plate flange and THRD etc.Standards:ANSI,DIN,EN,JIS,BS AWWA and GB ect.Size & Pressure: 15mm-2500mm ...