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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If seamless rather than welded
Seamless stainless steel tubes for boilers fall under Chapter 73 heading 7304, distinct from welded tubes in 7306.
If wall thickness under 1.65 mm
Thinner-walled welded stainless tubes shift to different subheading within 7306.40 based on thickness criteria.
If imported as part of complete heat exchanger assembly
Parts of heat exchangers may classify under machinery heading 8419 if not imported as separate tubes.
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Import Tips & Compliance
• Obtain mill test certificates verifying chemical composition and mechanical properties for stainless steel grade compliance
• Ensure documentation specifies end-use in boilers or heat exchangers to avoid reclassification as general tubing
• Check for anti-dumping duties on certain stainless steel tubes from specific countries like China or India
Related Products under HTS 7306.40.50.15
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.
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.