ASTM A249 TP316L Bright Annealed Stainless Steel Welded Tubes , Used For Air Coolers ASTM A249 TP316L stainless steel tubes are typically welded tubes that are used for heat exchanger tubes, boiler tubes and condenser tubes. The "Bright Annealed" (BA) finish denotes a specialized heat treatment ... อ่านเพิ่มเติม