Carbon Steel material Form:Slip on Flanges SORF, Weld neck Flanges WNRF, Socket weld Flanges SWRF, Blind Flanges BLRF . Lapped joint Flanges, Screwed Flanges, Long weld neck Flanges, Reducing Flanges, Spectacle Flanges, Ring joint Flanges. Standard:ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.