The failure reason of the aluminum alloy tube was investigated by macroscopic and microcosmic appearance observement,quality of material test,the stress analysis.

Based on the analyses of the marketable reguirement,it is important that development of producing and deepen working aluminium alloy tube to advensed the economy of Shanxi.

In regard to eddy-current test for aluminium alloy tube, it is the established threshold value that will determine the ploducts acceptable or unacceptable.

Analysis on Defects of Alloy Steel Pipe Centrifugally Casted;

With the development of Sinopec and the increasing proportion of the Sulfur in petroleum, the demand of the alloy steel pipe used in Sinopec producing equipments is unceasingly increasing.