... you aluminium coil tube and coil pipe with nice quality and good price,Widely used ... evaporator,warm wind movement,air conditioner pipeline,car radiator,refrigerator,cooler,heat exchanger and so on .Following ... 20005.Putting N2 gas inside tube 24hours to keep pressure and test leaks.6.we ... 7m,9m,11m,15m etc lenght coil tube or straight tube. Characteristicparameter tableGradesStandardsTensile strength σb ...