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Pseudo-inferior thick-walled steel pipe is how to identify?

1. Counterfeit thick-walled steel tubes tend to collapse.

Folding is the formation of a variety of fold lines on the surface of thick-walled steel tubes. Such defects often run through the entire product. The reason for the folding is due to the high efficiency of the shoddy manufacturers, the large amount of reduction, the generation of ears, and the folding of the folded products, which results in the folding of the folded products and the strength of the steel material.

2. Counterfeit thick-walled steel pipe surface often has pockmarked phenomenon.

The pockmark is due to the irregular wear and tear of the steel surface due to the wear of the groove. Because shoddy steel pipe manufacturers are pursuing profits, rolling slot rolling is often the most excessive.

3. Counterfeit thick-walled steel pipes tend to produce scars on the surface.

There are two reasons: (1). Inaccurate steel pipe material, many impurities. (2). The inferior guide manufacturers' equipment is simple and easy to stick to steel, and these impurities are easy to produce scars after being bitten by rollers.

4. The surface of the inferior material is prone to cracks because its blank is adobe and the porosity of the blank is large. The adobe is subjected to thermal stress during the cooling process and cracks are generated. After the rolling, cracks occur.

5. Counterfeit and thick-walled pipes are easy to be scratched. The reason is that the shoddy steel pipe manufacturers are poor in equipment and are prone to generate burrs and scratch the surface of the steel. Deep scratches reduce the strength of the steel.

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