Cold-Reduced Boiler Wall Tube Grade T91
Cold-reduced T91 seamless tube for furnace wall panels in supercritical boilers. Advanced 9Cr steel for ultra-high efficiency plants. Suitable for boilers under 7304.51.50.45.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If other modified 9Cr-1Mo alloys
Grade variations get specific statistical suffixes.
If longitudinally welded
Welded construction moves to Chapter 73 welded tube headings.
If pre-bent for specific boiler panels
Fabricated boiler parts classify separately from straight tubes.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Normalize & temper certs mandatory for T91; reject inadequate heat treatment
• Dimension tolerances tighter for wall tubes; measure before shipping
Related Products under HTS 7304.51.50.45
Cold-Drawn Alloy Steel Boiler Tube SA-213 TP304
Seamless cold-drawn tube of circular cross-section made from TP304 stainless alloy steel, specifically designed for high-pressure boiler applications. It meets ASME SA-213 standards for use in superheaters and heat exchangers due to its corrosion resistance and strength at elevated temperatures. Classified under 7304.51.50.45 as cold-formed seamless alloy steel tube suitable for boilers.
Cold-Drawn Superheater Tube ASTM A335 P11
Seamless cold-drawn tube of P11 alloy steel per ASTM A335, engineered for superheaters in power generation boilers. It withstands high temperatures and pressures while resisting creep and oxidation. Classified in 7304.51.50.45 as suitable for superheaters.
Cold-Drawn Alloy Steel Superheater Riser Tube
Cold-drawn seamless riser tube of 2.25Cr-1Mo alloy steel for connecting superheater sections in utility boilers. Provides reliable high-pressure steam flow with oxidation resistance. Classified 7304.51.50.45 for superheaters.
Cold-Rolled Seamless Heat Exchanger Tube SA-213 TP316
Cold-rolled seamless tube from TP316 alloy steel, optimized for heat exchangers and condensers in refining processes. Its enhanced molybdenum content provides superior resistance to pitting and corrosion in harsh environments. Falls under 7304.51.50.45 for cold-formed alloy steel tubes designated for heat exchangers.
Cold-Drawn High-Pressure Boiler Header Tube TP304H
Cold-drawn TP304H seamless tube for high-pressure boiler headers and manifolds. Higher carbon for elevated temperature strength. Classified 7304.51.50.45 for boiler use.
Cold-Reduced Condenser Tube SA-213 TP321
Cold-reduced seamless tube from TP321 stabilized stainless alloy steel for condenser tubes in steam power plants. Titanium stabilization prevents carbide precipitation during welding and high-heat exposure. Under 7304.51.50.45 for cold-formed alloy tubes in condensers.