Nowadays, Seamless galvanized steel pipe is more and more widely used, especially thick-walled seamless galvanized steel pipe, and manufacturers are increasing. There is a demand for the quality of thick-walled seamless galvanized steel pipe, so how to distinguish the quality of thick-walled seamless galvanized steel pipes?

　　The first quality thick-walled ASTM Sch80 Seamless Galvanized Steel Pipe is uniform in composition, looks very regular on the cutting head, and feels smooth rather than burred. However, because of poor material quality, the end face of the cutting head is often uneven, and because of the fewer cutting heads of fake and inferior products, big ears will appear at the end.

　　Secondly, if it is fake and inferior thick-walled seamless galvanizedsteel pipe, then it will show a light red color in color, and the residual thick-walled seamless galvanized steel pipe can not reach the standard in temperature.

　　The cross section of the fake and inferior thick-walled seamless galvanized steel tube is not circular, it may be elliptical or other shapes. This is because the manufacturer saves information, Jerry work and material reduction results, so this is not in line with the specification of shape and size. There is also the appearance of scarring, which is not allowed in high-quality thick-walled seamless galvanized steel pipe, but it is easy to see this appearance on the residual thick-walled seamless galvanized steel pipe.

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