Cold-Drawn 316L Stainless Steel Heat Exchanger Tube
Cold-drawn welded tubes of 316L stainless steel with wall thickness of at least 1.65 mm, optimized for heat exchanger applications in chemical processing. The enhanced molybdenum content provides superior corrosion resistance in aggressive environments. Fits HTS 7306.40.50.15 for welded stainless tubes suitable for heat exchangers.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of alloy steel rather than stainless
Non-stainless alloy steel welded tubes for similar uses classify under 7306.50, based on material composition.
If for seamless construction
Seamless versions of these high-pressure tubes move to 7304 heading, excluding welded products.
If when supplied as components in refining equipment sets
Tubes imported solely as parts of complete machines may fall under machinery Chapter 84/85.
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Import Tips & Compliance
• Provide evidence of cold-drawing process and wall thickness measurements during customs valuation
• Label with precise outside diameter and wall thickness to confirm statistical suffix eligibility
• Verify country of melt and pour origin, as Section 232 tariffs may apply to certain steel imports
Related Products under HTS 7306.40.50.15
Welded 304 Stainless Steel Boiler Tube
These welded stainless steel tubes with circular cross-section and wall thickness over 1.65 mm are designed specifically for use in high-pressure boilers. Made from 304 grade stainless steel, they resist corrosion and high temperatures in steam generation systems. Classified under HTS 7306.40.50.15 due to their welded construction and suitability for boilers.
Welded 304H Stainless Superheater Tube
High-temperature resistant welded 304H stainless steel tubes with thick walls (≥1.65 mm) for superheater sections in power plant boilers. The stabilized composition prevents carbide precipitation during prolonged heat exposure. HTS 7306.40.50.15 applies to these welded stainless tubes designated for superheaters.
Duplex 2205 Stainless Condenser Tube
Welded duplex 2205 stainless steel tubes featuring high strength and corrosion resistance, with wall thickness over 1.65 mm for condenser applications in power plants. Ideal for handling cooling water with chloride content. Classified in HTS 7306.40.50.15 as welded stainless tubes for condensers.
317L Stainless Steel Feedwater Heater Tube
Corrosion-resistant welded 317L stainless tubes with thick walls for feedwater heaters in steam cycles, preventing stress corrosion cracking. The higher molybdenum content enhances pitting resistance. Meets HTS 7306.40.50.15 criteria for welded stainless tubes in feedwater heaters.
310S Stainless Refining Furnace Tube
High oxidation resistance welded 310S stainless steel tubes for petroleum refining furnace applications, featuring wall thickness ≥1.65 mm to withstand carburizing atmospheres. Provides excellent creep strength at elevated temperatures. HTS 7306.40.50.15 covers these welded stainless tubes for refining furnaces.
304 Stainless Steel U-Tube for Condensers
Pre-formed U-bent welded 304 stainless steel tubes with heavy walls for surface condenser tube bundles in marine and power applications. The U-shape facilitates thermal expansion. Classified under HTS 7306.40.50.15 as suitable for condensers despite bending.