RONSCO Teaches You How To Identify Inferior Stainless Steel Welded Pipe

Ronsco is a professional manufacturer and supplier of stainless steel products, and customers often ask us how to choose stainless steel pipes.

The quality of stainless steel welded pipes on the market varies. Consumers usually worry about buying inferior stainless steel welded pipe products when buying. Ronsco will briefly introduce how to identify inferior stainless steel welded pipes. Observe the performance from the following 5 aspects. It is good to avoid buying inferior stainless steel welded pipes.

1. Folding of stainless steel welded pipe.

Fake and inferior welded stainless steel pipes are prone to folds. Folding is a variety of fold lines formed on the surface of the stainless steel pipe. This defect often runs through the longitudinal direction of the entire product. The reason for the folding is that the counterfeit manufacturers are excessively pursuing high efficiency, and the reduction is too large, resulting in the formation of ears in the tube, which will form a fold during the next rolling, and the folded product will crack after bending, and the strength of the stainless steel tube will be reduced. There is a significant decline. The appearance of fake and inferior welded stainless steel pipes will be pitted. The pitted surface is caused by the serious wear of the rolling groove, which leads to the irregularity of the surface of the stainless steel.

2. Scarring of stainless steel welded pipe.

The surface of fake and inferior stainless steel welded pipe is easy to scar. There are two main reasons for the formation. One is that the material of inferior stainless steel welded pipe is uneven and there are many impurities. The other is that the guide sanitation equipment of the fake and inferior stainless steel welded pipe manufacturers is simple and easy to stick to the steel. These impurities will easily form scars after biting into the roll.

3. Cracks in stainless steel welded pipes.

Cracks are also easy to form on the surface of fake stainless steel welded pipes, because the blank is a poor blank, and the poor blank has a lot of pores. The poor blank is formed due to thermal stress during the cooling process. Cracks, there will be cracks after rolling.

4. Surface of stainless steel welded pipe.

The surface of inferior stainless steel welded pipes has no metallic luster and will show a light red or pig-iron-like color.There are two reasons for the formation. One is that the blank is adobe. The other is that the rolling temperature of counterfeit and inferior pipes is not standard. The steel temperature is visually measured. If it cannot be rolled according to the specified austenite area, the performance of stainless steel pipes will naturally not reach the standard. Fake stainless steel welded pipes are also easy to be scratched, because the production equipment of the fake stainless steel welded pipe manufacturers is simple, easy to form burrs, scratch the surface of the steel, and deep scratches will also weaken the strength of the stainless steel pipe. The cross ribs of counterfeit and inferior welded stainless steel pipes are thin and low, which often causes dissatisfaction. In order to achieve a large negative tolerance, the manufacturer had a large reduction in the first few passes of the finished product, a small iron type, and a dissatisfaction with the hole type. The cross-section of the fake and inferior welded stainless steel pipe is elliptical. This is because, in order to save material, the reduction of the first two passes of the finished roll is too large.

5. Inferior stainless steel welded pipe specifications and dimensions.

The negative tolerances of inferior stainless steel welded pipes usually exceed regulations. Inferior stainless steel pipes contain many impurities. The density of stainless steel pipe materials is low, and the size tolerance is more serious. Therefore, if there is no vernier caliper, it can be weighed. Check.