1. The automobile industry
The main use of stainless steel is the exhaust system, accounting for more than 1/2 of the total amount of stainless steel used in automobiles, and 80% is ferritic stainless steel. The exhaust gas produced by the automobile engine flows out of the muffler through the exhaust gas intake pipe, front pipe, hose, converter, and center pipe. Exhaust system commonly used steel types 409L, 436L and so on. Automobile mufflers mainly use stainless steel welded pipe. It is estimated that the stainless steel pipe used by the automobile accounts for about 1.5% of the entire downstream stainless steel pipe consumption, and the use ratio of stainless steel seamless pipe and welded pipe is about 2:1.
2, petrochemical industry including fertilizer industry
The demand for stainless steel pipe is large, the industry mainly uses stainless steel seamless pipe, specifications include: 304, 321, 316, 316L, 347, 317L, etc., the outer diameter is about 18-￠610, the wall thickness is about 6mm-50mm (generally the selection of specifications in Φ159mm above the low-pressure pipeline), the specific application field is: Furnace tube, material conveying tube, heat exchanger tube, etc.
3, water and gas and other fluid transportation
Stainless steel pipes and their water transport equipment are very good basic water purification materials, and their corrosion resistance is strong, cast iron pipes, carbon steel pipes, plastic pipes, etc., can not be compared with them.
Water preparation, storage, transportation, purification, regeneration, desalination and other water industry material selection. Annual demand is about 25,000 tons.
4. Equipment manufacturing and maintenance
Annual consumption of stainless steel pipe more than 20,000 tons. This type of industry mainly uses sanitary or antibacterial grade stainless steel pipes. The sanitary seamless pipe made of imported SUS304 and 316L can meet the special requirements of various media in the field of food and biopharmaceutical. Antibacterial stainless steel has the advantages of stainless steel and good antibacterial properties, and the demand for kitchen equipment, food industry worktables and utensils, medical equipment, tableware in daily life and hanging towel brackets, refrigerators and other fields is increasing.
