... as per agreement.9. applications:fluid and gas transport ,structure ,boiler,hear ecchanger,super heater10.certification:ISO9000 ... Test,Corrosion Test,Flattening Test and so on.accurate aluminium alloy steel pipeO.DO.D toleranceW.TThickness ... requirementsApplicationFor boiler,superheater,heat-exchangerMain market:Middle east, Africa, North and South America, East and West Europe, South and southeast ...