The exhaust system is mainly used for stainless steel, which accounts for more than 1/2 of the total stainless steel used for automobiles and 80% of ferritic stainless steel. The exhaust gas generated by the engine of an automobile flows out of the muffler through the exhaust gas inlet pipe, the front pipe, the hose, the converter, and the central pipe. Exhaust system commonly used steel 409L, 436L and so on. Automobile mufflers mainly use stainless steel welded pipes. It is estimated that the stainless steel pipes used in automobiles account for about 1.5% of the entire downstream stainless steel pipes, and the ratio of stainless steel seamless pipes and welded pipes is approximately 2:1.
Petrochemical industry including fertilizer industry
Demand for stainless steel pipe is extremely large, the industry mainly uses stainless steel seamless pipe, specifications include: 304, 321, 316, 316L, 347, 317L, etc., outer diameter is around 18-¢610, wall thickness is 6mm-50mm Right and left (usually the medium and low pressure transmission pipeline with the specification of more than Φ 159mm), the specific application areas are: furnace tubes, material transportation tubes, heat exchanger tubes and so on.
Water and gas and other fluid transport
Stainless steel pipelines and water delivery equipment are the most advanced basic water purification materials in the world today, and their corrosion resistance is strong. Cast iron pipes, carbon steel pipes, and plastic pipes cannot be compared with them.