Application aresa of Seamless Stainless Steel Tube

Stainless steel seamless pipes, with their exceptional corrosion resistance, excellent high and low temperature resistance, high strength, good processability, and long service life, have become an indispensable key foundational material in the global modern industrial system. Their applications are extensive and diverse. The following is a detailed analysis of their main application areas:

• Media Transportation: Transports crude oil, refined oil, natural gas, liquefied petroleum gas (LPG), liquefied natural gas (LNG), and various chemical raw materials (acids, alkalis, salts, organic solvents, etc.). Seamless construction ensures the safe transportation of high-pressure, flammable, explosive, or toxic media.
• Process Piping: Forms the core of the complex process piping networks within refineries, chemical plants, fertilizer plants (such as high-pressure piping in urea plants), and chemical fiber plants, withstanding high temperatures, high pressures, and highly corrosive media. Examples include cracking furnace tubes, reforming unit piping, hydrogenation reactor inlet and outlet pipes, and heat exchanger tubes.
• LNG: Used in cryogenic piping systems (-162°C) for LNG receiving terminals, storage tanks, and transport vessels, requiring excellent low-temperature toughness (commonly used 304L and 316L).

oil & gas pipelines

Heat Exchanger

LNG storage tanks

• Thermal Power Generation: Used in boiler systems such as high-temperature and high-pressure superheater tubes, reheater tubes, economizer tubes, and main steam piping in supercritical and ultra-supercritical units. (Commonly used are austenitic heat-resistant steels such as TP304H, TP347H, Super304H, and HR3C, as well as nickel-based alloys.)
• Steam Turbine Systems: Main steam piping, reheat piping, extraction piping, feedwater piping, condensate piping, and bypass system piping.
• Environmental Protection Systems: Flue Gas Desulfurization (FGD) systems include absorber tower circulation piping, spray pipes, flue gas damper door sealing ducts, and demister flushing water pipes. (Commonly used are corrosion-resistant alloys such as 2205 duplex steel, 317L, 904L, and 254SMO).

Main steam pipe

Steam Turbine Systems

Spray tower

• Fluid Transmission Systems: Manufacturing hydraulic cylinders for hydraulic props (coal mine support), construction machinery (excavators, cranes), and precision hydraulic and pneumatic system piping. High precision, high finish, and high-pressure resistance are required.
• Structural Support and Drive Shafts: Used in machinery frames, props, bearing sleeves, drive shafts, etc., providing structural strength and rigidity.
• Papermaking Machinery: Pipes and rollers in corrosive environments, such as bleaching processes and pulp transportation.
• Automobile: Ferritic stainless steel (such as 409 and 436) is commonly used in automotive exhaust systems (manifolds, head pipes, catalytic converters, and mufflers). Fuel injection system pipes and sensor housings are also used.

• Pharmaceutical Equipment: Bioreactors, fermenters, purification systems, liquid preparation systems, and clean piping systems (requiring extremely high cleanliness, no precipitates, and easy cleaning and sterilization; 316L or higher grades are commonly used).
• Medical Devices: Surgical instruments, implants (such as orthopedic nail plates), and diagnostic equipment components (requiring excellent biocompatibility and sterilization resistance).

• Aerospace: Engine fuel/hydraulic lines, landing gear components, and fuselage hydraulic systems (requiring extremely high performance, high reliability, and lightweight design).
• Shipbuilding and Offshore Engineering: Marine engine exhaust systems, fuel/oil lines, ballast/fire water lines, and desalination plant piping. Also, process piping, fire water pipes, seawater cooling pipes, and structural components on offshore platforms (require seawater corrosion resistance, commonly using 316L, duplex steel, super duplex steel, and 6Mo alloy).