When people buy SA 213 boiler tubes, they are always worried about their quality problems. There are some simple quality appraisal methods.


Firstly, low quality SA 213 boiler tubes are easy to fold. Folding is a variety of folding lines formed on the surface of SA 213 boiler tubes, which usually run through the longitudinal direction of the whole product. The reason for folding is that the manufacturer's efficiency is high and the pressure is too high, which causes the ears to fold when rolling next time. After bending, the product will bend and the strength of SA 213 boiler tube will decrease.


Second, the surface of inferior SA 213 boiler tube is prone to scar. There are two reasons:
1. Bad SA 213 boiler tube material is not uniform and has more impurities.
2. The poor quality factory guide equipment is simple and easy to stick steel. These impurities are easy to produce scars after biting.


Thirdly, there are two reasons for the poor quality SA 213 boiler tubes not having metallic luster, pale or similar pig iron color.
1. Its blank is adobe.
2. The quality of rolling material is not up to standard. The steel temperature is visual, so it can not meet the requirements of austenite rolling, and the performance of SA 213 boiler tube can not be achieved.


Fourthly, the cross section of inferior boiler tubes is elliptical, because in order to save material, the first volume of the first volume is too large, the strength of this kind of screw steel is greatly reduced, and does not meet the size standard of the screw steel.


Fifth, the appearance of low-quality SA 213 boiler tubes is often numb. Incontinence is caused by groove wear and tear, which results in serious irregular surface of SA 213 boiler tube. Due to the poor quality of SA 213 boiler tube manufacturers to pursue profits, often rolling the most standard.