Stainless Steel Tubing for Fired Heaters
Selecting the right tubing material is crucial for performance and longevity for fired heaters. Stainless steel tubes have become a preferred choice due to superior properties, especially when compared to other materials.
The Role of Stainless Steel Tubing
Fired heaters, integral to many industrial processes, require reliable and durable tubing from manufacturers to withstand harsh operating conditions. Stainless steel tubing from leading tubing manufactures is highly favored in these applications because of its excellent corrosion resistance, high-temperature stability, and overall durability (ensuring a longer service life and reduced maintenance costs.).
Common Stainless Steel Grades
- Austenitic Grades: The 300 series austenitic stainless steels, including grades such as 317, 321, and 347H, are commonly used in fired heaters. These grades offer high resistance to oxidation and corrosion, making them suitable for high-temperature environments. Grade 317 is known for its enhanced resistance to chlorides, while Grade 321 is stabilized with titanium to prevent carbide precipitation.
- Alloy 800 Tubes: For applications that require exceptional high-temperature performance, Alloy 800 is a great choice. This alloy provides excellent resistance to oxidation and carburization, making it ideal for high-temperature processes.
- Specialized Materials: In addition to standard grades, there are specialized materials designed to address specific challenges in fired heaters. These include advanced alloys such as Alloy 600, which offers high resistance to oxidation, and alloys like 316HNb that are tailored to handle increased corrosion from substances like biofuels and naphthenic acids. These materials are selected based on the unique demands of each application.
Tubing Requirements for Various Units
- Crude Units: In crude units, convection tubes are typically made from carbon steel or low alloy steels like 5Cr-1Mo, 7Cr-1Mo, or 9Cr-1Mo. Radiant tubes usually follow the same materials, though some units use stainless steel types such as 316L or 317L in areas of high velocity or outlet sections.
- Vacuum Units: These units use materials similar to those found in crude units. Radiant sections may also incorporate stainless steel Type 347 to enhance durability and performance.
- Delayed Coker Units: The 9Cr-1Mo alloy is the dominant material for both radiant and convection sections in these units. However, upgrades to stainless steel Type 347 or Incoloy 800H/HT are becoming more common to improve performance and extend service life.
- Hydroprocessing Units: For these units, radiant section tubes are often made from 300 series stainless steels. Type 347, known for its thermal stability, is a common choice for new tubes or replacements. Carbon steel with 12Cr alloy fins and older units with various stainless steel grades are also observed.
- Steam Methane Reformer Units: High-performance modified and microalloyed steels are standard for these applications, providing the necessary strength and resistance for high-pressure environments.
Contact a Leading Tubing Manufacturer for Your Needs
As industries continue to evolve and face new challenges, the need for high-quality materials like stainless steel tubing becomes increasingly important. TUBACEX America, a global leader in manufacturing seamless stainless steel and nickel alloy tubes in the United States, stands at the forefront of this industry, offering a comprehensive range of solutions for fired heaters. TUBACEX America’s advanced portfolio includes Alloy 800, 600, and specialized materials like 316HNb, which effectively address emerging challenges such as increased corrosion from biofuels and naphthenic acid corrosion. TUBACEX America caters to various equipment needs, including vacuum, coker, crude, and reformer units, with sizes ranging from 3 to 8 inches and wall thicknesses from S40 to S160.
In addition to fired heater tubes, TUBACEX America is your go-to manufacturer for all your nickel alloy and stainless steel tubing needs: Aerospace and Defense Tubing, Space Exploration Tubing, Medium Pressure Tubing, High Pressure Tubing, OCTG Tubing, Instrumentation Tubing, Coiled Tubing, Hydraulic Tubing, Heat Exchanger Tubing, Line Pie/Furnace, Nuclear and Power Generation Tubing, Precision Tubing, Mechanical/DOM Tubing, Fittings & Special Components, Bars and Billets, and Hollow Bars.