ASTM A350 LF2 flanges are available in welded or bolted designs. Flanges are bolted or welded to pipes to create connections between pipes. Shasan Piping Solution is a leading manufacturer and supplier of a variety of ASME SA 350 GR LF2 Weld Neck Flange dimensions and types. Material composition includes carbon, silicon, manganese, phosphorus, sulfur, molybdenum, copper, chromium, nic... https://www.shasanpiping.com/carbon-steel-a-350-lf2-flanges-manufacturers-exporters-suppliers-stockists.html