Key Words: Welding Neck Flanges, Slip On Flanges, Threaded Flanges, Lap Joint Flanges, ... or materials are also available on request. Main Products: Welding Neck Flanges, Slip On Flanges, Threaded Flanges, Lap ... standard. Special requests or material are also available on request. Design:ANSIB16.5,ANSIB16.47, DIN2527,DIN2631DIN2635 ... etc You can refer to http://www.hiwaflow.com for detail specifications.