In environments that are corrosive enough to cause intergranular corrosion in welds and heat affected zones, these should use stainless steel UNS S31600/S31603 blind flanges due to its low carbon content.
SS 316/316L flanges can be fabricated from ASTM A182 F316 or F316L forgings, ASTM A351 CF8M or CF3M castings, and ASTM A240 316 or 316L plates per ASME B16.5 and ASME B16.47.
SS 316/ 316L flanges are available in many types such as butt weld, socket, blind hole, socket weld, lap, thread and reducer.
ASME B16.5 flanges are available in sizes 1/2″ to 24″ in classes 150, 300, 400, 600, 900, 1500, 2500.
ASTM A182 F316L is a forging material specification for 316L grade stainless steel and is used for manufacturing bare forgings or forged and machined products for applications involving high temperature service.
