2023-10-25 ASTM A350 LF2 is a common low-temperature carbon steel material, mainly used to manufacture low-temperature high-pressure forged pipe fittings and flanges.Blind flanges are generally non-porous in the middle, serving as a barrier and cutoff. Due to their good ASTM A350 LF2 is a common low-temperature carbon steel material, mainly used to manufacture low-temperature high-pressure forged pipe fittings and flanges.Blind flanges are generally non-porous in the middle, serving as a barrier and cutoff. Due to their good sealing performance, they are a reliable sealing means for pipeline systems.