boiler economizer: 1.Membrane Wall Tube can be processed alloy ... 2.good quanlity Tetragonum cast iron economizerstream line form economizer pipeName code name UnitDataeconomizer pipe lengthLmm1500200025003000pitch of fin NPic557595115heating ... =60mm55.1772.3789.58106.81 our company also produce :Economizer, air preheater, coal conveyor, slag removal machine, water treatment equipment, exhauster, ...