... and Applications:Manifold Tubular Heaters is made of metallic tube, heating alloy wire and mg.The material of metallic tube is Stainless ... on.In the middle of the tube, there are spiral alloy wire (nickel-chrome, ferrochrome)and be filled with the mgo ... of saltpeter, water tank, oil tank, acid tank fusible metal heating and melting furnaces, air heater, oven, hot die and other ...