How to identify the quality of seamless steel pipe?

How to identify the quality of seamless pipe?

The application of seamless steel pipe is more and more extensive. When we choose seamless steel pipes, we must check the quality of seamless steel pipes. Let me give you a detailed introduction:

1. Fake and inferior seamless steel pipes are easy to scratch, because the fake and inferior seamless steel pipe manufacturers have simple equipment, which is prone to burrs and scratches on the steel surface. Deep scratches reduce the strength of the steel.

2. The counterfeit seamless carbon steel pipe has no metallic luster and is light red or similar to pig iron.

3. The cross ratio of counterfeit seamless steel pipes is thin and low, and the filling is often not full. The reason is that the manufacturer needs to achieve a large negative tolerance, the reduction in the first few passes of the finished product is too large, the iron shape is small, and the pass shape is not satisfactory.

4. Counterfeiters must reduce the number of the first two rolls of the finished roll in order to save materials. The strength of this seamless steel pipe is greatly reduced and does not meet the requirements of seamless steel pipes. Standard size.

5. The composition of high-quality seamless steel pipe is uniform, the tonnage of the cold shear is high, and the end surface of the cutting head is smooth and tidy. And because the counterfeit and shoddy manufacturers have fewer heads, big ears will appear at the head and tail.

6. Fake and shoddy seamless steel pipes have many impurities, low steel density, and poor dimensions, so they can be checked by weighing without a vernier caliper. Generally speaking, the weighing effect of the whole box will be better, mainly considering the problems of cumulative error and probability theory.

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