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Application requirements of stainless steel pipes

The application requirements for stainless steel pipes are as follows:

1. The automotive industry

The main use of stainless steel is in the exhaust system, which accounts for more than half of the total amount of stainless steel used in automobiles, with 80% being ferritic stainless steel. The exhaust gas generated by the car engine flows out of the muffler through the exhaust intake pipe, front pipe, hose, converter, and center pipe. The commonly used steel types for exhaust systems include 409L, 436L, etc. The car muffler mainly uses stainless steel welded pipes. According to calculations, stainless steel pipes used in automobiles account for approximately 1.5% of the total downstream usage of stainless steel pipes, while the proportion of seamless and welded stainless steel pipes used is approximately 2:1.

2. The petrochemical industry includes the fertilizer industry

There is a high demand for stainless steel pipes, and the industry mainly uses seamless stainless steel pipes with specifications including 304, 321, 316, 316L, 347, 317L, etc. The outer diameter is around 18-D610, and the wall thickness is around 6mm-50mm (usually using medium and low pressure conveying pipes with specifications above 4159mm). The specific application areas are furnace pipes, material conveying pipes, heat exchanger pipes, etc.

3. Transportation of fluids such as water and gas

Stainless steel pipes and their water conveying equipment are excellent basic water purification materials with strong corrosion resistance, which cannot be compared to cast iron pipes, carbon steel pipes, plastic pipes, etc.

Water preparation, storage, transportation, purification, seawater desalination, and other water industry material selection. The annual demand is approximately 25000 tons.

4. Equipment manufacturing and maintenance

Annual consumption of over 20000 tons of stainless steel pipes. 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 requirements of various media in the fields of food and biopharmaceuticals. Antibacterial stainless steel has the advantages of stainless steel and good antibacterial properties. The demand for it is constantly increasing in fields such as kitchen equipment, workbenches and utensils in the food industry, medical equipment, tableware and towel racks in daily life, and brackets for refrigerated cabinets.