Nowadays, there are more and more manufacturers producing din aisi astm 302 stainless steel seamless pipe for exhaust pipe. In order to reduce costs, the quality of the products produced by many manufacturers is getting worse and worse, which affects its use. The following is an introduction to the problems that are prone to occur in the production of this product:
1. Production license: In addition to the relevant qualified personnel and requirements required by the manufacturer to apply for a production license, tens of thousands of fees must be paid a year. Therefore, some factories can achieve the qualifications, but in order to save money, they use other people's licenses. The reason why some small factories can not be established may be that the qualifications are not met.
2. Tube blank: Although the tube blank of the Jiangsu factory is cheap, it has many impurities, and various problems will occur during processing. Increasing the processing difficulty will directly affect the quality of the finished product, resulting in poor mechanical properties, pitted pipes, leaking pipes, peeling, and eccentricity. For the sake of cost, some factories choose Jiangsu materials or even return materials.
3. Graying: Due to the skill of workers, uneven graying may occur, which will cause black spots on the finished pipe, which will not affect the mechanical properties of the finished pipe, mainly because it is ugly.
4. Drawing: For the cost of some small factories, the drawing machines cannot be regularly repaired, and the overloaded use will cause small fissures on the surface of the finished pipe. It can be solved by polishing and sandblasting. In addition, only one pipe needs to be drawn, which saves processing costs and affects the mechanical properties of the finished pipe.
5. Rolling: Some din aisi astm 302 stainless steel seamless pipe for exhaust pipe specifications require a rolling mill, and the finished product requires surface grinding, and small factories will not repair them one by one for cost.
6. Sizing: In order to save costs when cutting, the pipe opening is not flat, and the place that should be cut is cut off. Affect the finished nozzle. It will affect the quality of the finished tube.