Key Words: Welding Neck Flanges, Slip On Flanges, Threaded Flanges, Lap Joint Flanges, Blind Flanges with ... standard. Special requests or materials are also available on request. Main Products: Welding Neck Flanges, Slip On Flanges, Threaded Flanges, Lap Joint ... BS, EN, JIS standard. Special requests or material are also available on request. Design:ANSIB16.5,ANSIB16.47, DIN2527,DIN2631DIN2635,DIN2573, ...