Chapter 7411 — Customs Tariff Headings

Seamless C10100 OFHC Copper Vacuum Tubing

Seamless C10100 OFHC copper vacuum tubing, made from oxygen-free high-conductivity refined copper, is designed for high-vacuum systems in semiconductor manufacturing. Its seamless construction and high purity ensure minimal outgassing and excellent conductivity, qualifying it under tariff item 7411.10.00 for tubes and pipes of refined copper.

Seamless C10200 Oxygen-Free Copper RF Tubing

Seamless C10200 oxygen-free copper RF tubing is used for radio frequency waveguides and microwave components, where low signal loss is critical. Made from refined copper with minimal impurities, its seamless form and high conductivity place it under tariff item 7411.10.00 for tubes and pipes of refined copper.

Seamless C11000 ETP Copper Instrumentation Tubing

Seamless C11000 ETP copper instrumentation tubing is used for precision instrumentation and laboratory gas lines, offering leak-tight connections and corrosion resistance. As a refined copper product with a seamless construction, it falls under tariff item 7411.10.00 for tubes and pipes of refined copper.

Seamless C12200 Copper Water Line Tubing

Seamless C12200 copper water line tubing, made from deoxidized refined copper, is used for potable water supply lines in plumbing. Its seamless construction and refined copper composition qualify it under tariff item 7411.10.00 for tubes and pipes of refined copper.

Seamless DHP Copper Heat Exchanger Tubing

Seamless DHP copper heat exchanger tubing, made from deoxidized high-phosphorus refined copper, is used in shell-and-tube heat exchangers for industrial process cooling. Its seamless form and refined copper composition place it under tariff item 7411.10.00 for tubes and pipes of refined copper.

Seamless Refined Copper Brewery Wort Chiller Tubing

Seamless refined copper brewery wort chiller tubing is used to make immersion coils for cooling craft beer. As a basic seamless refined copper tube before coiling, it falls under tariff item 7411.10.00 for tubes and pipes of refined copper.

Seamless Refined Copper Cryogenic Transfer Lines

Seamless refined copper cryogenic transfer lines are used for liquid nitrogen and helium transfer in research facilities, offering excellent thermal conductivity at low temperatures. As seamless tubes of refined copper, they fall under tariff item 7411.10.00.

Seamless Refined Copper Fuel Line Tubing

Seamless refined copper fuel line tubing is used for low-pressure fuel lines in propane and natural gas appliances, offering corrosion resistance for gas service. As a seamless tube of refined copper, it falls under tariff item 7411.10.00.

Seamless Refined Copper Medical Gas Piping

Seamless refined copper medical gas piping is used for hospital oxygen and nitrous oxide delivery systems, with medical-grade cleanliness and seamless design to prevent leaks. As seamless tubes of refined copper, they fall under tariff item 7411.10.00.

Seamless Refined Copper Pneumatic Cylinder Tubing

Seamless refined copper pneumatic cylinder tubing is used for pneumatic and hydraulic cylinders in automation equipment, offering high strength and conductivity. As seamless tubes of refined copper, they fall under tariff item 7411.10.00.

Seamless Refined Copper Refrigeration Tubing

Seamless refined copper refrigeration tubing is designed for refrigerant lines in HVAC systems and refrigerators, with high precision and purity. As seamless tubes of refined copper, they fall under tariff item 7411.10.00.

Seamless Refined Copper Solar Thermal Collector Tubing

Seamless refined copper solar thermal collector tubing is used as riser tubes in flat plate solar collectors, with coatings applied post-import. As seamless tubes of refined copper, they fall under tariff item 7411.10.00.

Seamless Type K Soft Copper Grounding Tubing

Seamless Type K soft copper grounding tubing, made from refined copper with a heavy wall, is used for electrical grounding conductors in building systems. As a seamless tube of refined copper, it falls under tariff item 7411.10.00.

Seamless Type L Copper Evaporator Coils Tubing

Seamless Type L copper evaporator coil tubing, made from refined copper, is formed into coils for air conditioner evaporators. As basic seamless refined copper tubes before final coil assembly, they fall under tariff item 7411.10.00.

Seamless UNS C12200 ACR Copper Tubing

Seamless UNS C12200 ACR copper tubing, made from refined copper and nitrogen-charged to prevent oxidation, is used for air conditioning and refrigeration service. As a seamless tube of refined copper, it falls under tariff item 7411.10.00.

Seamless Admiralty Brass Condenser Tube

Seamless Admiralty Brass Condenser Tube is a copper-zinc base alloy (brass) tube, containing approximately 70% copper and 30% zinc with trace elements such as arsenic for corrosion resistance. It is used in heat exchanger condensers in marine and HVAC applications. This product falls under tariff item 7411.21.00 because it is a tube of copper-zinc base alloy (brass), as defined in subheading note 1(a).

Seamless Brass Evaporator Coil Tubing

Seamless Brass Evaporator Coil Tubing is a seamless brass tube formed into coils for use in HVAC evaporator units. The product is made from a copper-zinc base alloy (brass) and is used for refrigerant flow. It falls under tariff item 7411.21.00 as a tube of copper-zinc base alloy, regardless of being coiled after manufacture.

Seamless Brass Gas Line Tubing for Appliances

Seamless Brass Gas Line Tubing for Appliances is a seamless brass tube used for natural gas or propane lines in stoves and furnaces. It is made from a copper-zinc base alloy (brass), meeting the definition of brass in subheading note 1(a). This product is classified under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless Brass Hydraulic Hose Line

Seamless Brass Hydraulic Hose Line is a seamless brass pipe used in hydraulic systems for fluid transfer in machinery. It is made from a copper-zinc base alloy (brass), with zinc as the predominant alloying element. This product falls under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless Brass Instrumentation Tubing 1/4 Inch

Seamless Brass Instrumentation Tubing 1/4 Inch is a precision seamless brass tube with a 1/4-inch outer diameter, used for instrumentation and control lines in gauges and sensors. It is made from a copper-zinc base alloy (brass). This product is classified under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless Brass Medical Gas Pipe

Seamless Brass Medical Gas Pipe is a seamless brass pipe used for oxygen and nitrous oxide delivery in hospitals. It is made from a copper-zinc base alloy (brass), meeting the definition of brass. This product falls under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless Brass Pneumatic Air Line Tubing

Seamless Brass Pneumatic Air Line Tubing is a seamless tube made from a brass alloy, used for compressed air lines in pneumatic tools and systems. It is a copper-zinc base alloy (brass) as defined in subheading note 1(a). This product is classified under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless Brass Refrigerator Tubing

Seamless Brass Refrigerator Tubing is a seamless tube made from a copper-zinc base alloy (brass), used in refrigeration systems for refrigerant flow. It meets the definition of brass in subheading note 1(a). This product falls under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless C44300 Brass Heat Exchanger Tube

Seamless C44300 Brass Heat Exchanger Tube is a C44300 grade seamless brass tube (70% Cu, 30% Zn, with arsenic) used for heat exchangers to resist corrosion. It is a copper-zinc base alloy (brass) as defined in subheading note 1(a). This product is classified under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless Cartridge Brass Hydraulic Tubing

Seamless Cartridge Brass Hydraulic Tubing is a cartridge brass (70/30 Cu/Zn) seamless tube used for high-pressure hydraulics. It is a copper-zinc base alloy (brass) as defined in subheading note 1(a). This product falls under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless DZR Brass Water Line Tube

Seamless DZR Brass Water Line Tube is a dezincification-resistant brass seamless tube used for potable water lines. It is still a copper-zinc base alloy (brass) as defined in subheading note 1(a), despite the addition of elements to prevent dezincification. This product is classified under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless Free-Cutting Brass Telescoping Tube

Seamless Free-Cutting Brass Telescoping Tube is a free-cutting brass (with lead) seamless tube used for adjustable mechanisms. It is still a copper-zinc base alloy (brass) as defined in subheading note 1(a), with lead added for machinability. This product falls under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless Muntz Metal Half-Hard Tubing

Seamless Muntz Metal Half-Hard Tubing is a Muntz metal (60/40 Cu/Zn) half-hard seamless tube used for marine hardware. It is a copper-zinc base alloy (brass) as defined in subheading note 1(a). This product is classified under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless Naval Brass Condenser Pipe

Seamless Naval Brass Condenser Pipe is a naval brass (arsenical) seamless pipe used for shipboard condensers. It is a copper-zinc base alloy (brass) as defined in subheading note 1(a), with tin added for corrosion resistance. This product falls under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Seamless Yellow Brass 3/8 Inch Pipe

Seamless Yellow Brass 3/8 Inch Pipe is a yellow brass (65% Cu, 35% Zn) seamless pipe with a 3/8-inch diameter, used for plumbing and instrumentation. It is a copper-zinc base alloy (brass) as defined in subheading note 1(a). This product is classified under tariff item 7411.21.00 as a tube of copper-zinc base alloy.

Cupro-Nickel 70/30 Instrumentation Tubing

Precision-drawn instrumentation tubing made from 70/30 cupro-nickel alloy, used in chemical processing plants for instrumentation lines due to its high resistance to corrosive fluids. This product qualifies as a tube of copper-nickel base alloy under tariff item 7411.22.00, as defined in subheading note 1(d).

Cupro-Nickel Desalination Plant Pipe

Large-diameter pipe for reverse osmosis desalination plants, leveraging cupro-nickel's resistance to chloride pitting. This pipe is a tube of copper-nickel base alloy, meeting the definition in subheading note 1(d) and classified under tariff item 7411.22.00.

Cupro-Nickel Heat Exchanger Tubing

Finned or straight tubing from cupro-nickel alloy for HVAC and power plant heat exchangers, offering superior thermal conductivity and erosion resistance. This tubing is a tube of copper-nickel base alloy, classified under tariff item 7411.22.00 per subheading note 1(d).

Cupro-Nickel Seamless Pipe 90/10

A seamless pipe made from 90% copper and 10% nickel (cupro-nickel alloy), used primarily in marine and desalination applications for its excellent corrosion resistance in seawater. This pipe is a tube of copper-nickel base alloy, classified under tariff item 7411.22.00 as per subheading note 1(d).

Nickel-Silver Condenser Tube

A thin-walled tube of nickel-silver (copper-nickel-zinc alloy with ≥5% Ni), designed for heat exchangers and condensers in industrial cooling systems. This tube is a tube of copper-nickel-zinc base alloy, classified under tariff item 7411.22.00 per subheading note 1(c).

Nickel-Silver Decorative Pipe

Polished nickel-silver pipe used in architectural fixtures and luxury furniture legs for its silver-like appearance and durability. This pipe is a tube of copper-nickel-zinc base alloy, classified under tariff item 7411.22.00 per subheading note 1(c).

Nickel-Silver Hydraulic Tubing

High-pressure tubing for hydraulic systems in aerospace applications, made from nickel-silver for vibration resistance and conductivity. This tubing is a tube of copper-nickel-zinc base alloy, classified under tariff item 7411.22.00 per subheading note 1(c).

Nickel-Silver Marine Exhaust Pipe

Corrosion-resistant pipe for boat exhaust systems made from nickel-silver alloy, handling high temperatures and saltwater exposure. This pipe is a tube of copper-nickel-zinc base alloy, classified under tariff item 7411.22.00 per subheading note 1(c).

C12200 Phosphor Bronze Seamless Tube

C12200 Phosphor Bronze Seamless Tube is a copper-tin alloy where tin predominates over other elements per subheading note 1(b). It is used in various industrial applications requiring strength and corrosion resistance. This tariff item covers other copper alloy tubes and pipes.

C28000 Muntz Metal Brass Tube

C28000 Muntz Metal Brass Tube is a drawn tube of copper-zinc alloy where zinc predominates over other elements per subheading note 1(a), with tin below 3%. It is commonly used in architectural applications. This tariff item covers other copper alloy tubes and pipes.

C62300 Aluminum Bronze Condenser Tube

C62300 Aluminum Bronze Condenser Tube is a copper-aluminum alloy with 9% aluminum, used in condensers. It does not fit the specific brass or bronze definitions but is a copper alloy covered under Chapter 74. This tariff item covers other copper alloy tubes and pipes.

C63000 Aluminum Bronze Pipe

C63000 Aluminum Bronze Pipe is a seamless pipe from nickel aluminum bronze, a copper-aluminum alloy. It is treated as a copper alloy under Chapter 74 notes. This tariff item covers other copper alloy tubes and pipes.

C65100 Low Silicon Bronze Pipe

C65100 Low Silicon Bronze Pipe is a copper-silicon alloy with 6% silicon, used for welding and structural marine applications. It is a copper alloy covered under Chapter 74. This tariff item covers other copper alloy tubes and pipes.

C67300 Brass Condenser Tube

C67300 Brass Condenser Tube is an arsenical Muntz metal copper-zinc-arsenic alloy used in heat exchangers. It qualifies as a copper-zinc base alloy (brass) under subheading note 1(a) because zinc predominates over other elements and tin content is below 3%. This tariff item covers other copper alloy tubes and pipes.

C69430 Silicon Bronze Tube

C69430 Silicon Bronze Tube is a copper-silicon alloy used in marine cooling systems. It is classified as a copper alloy under Chapter 74 notes, not fitting the specific brass or bronze definitions. This tariff item covers other copper alloy tubes and pipes.

Seamless Admiralty Brass Tube

Seamless Admiralty Brass Tube (C44300) is a copper-zinc-tin alloy pipe used in heat exchangers and condensers. It qualifies as a copper-zinc base alloy (brass) under subheading note 1(a) because zinc predominates over other elements and tin content is below 3%. This tariff item covers other copper alloy tubes and pipes not elsewhere specified.

Seamless Aluminum Brass Condenser Tube

Seamless Aluminum Brass Condenser Tube (C68700) is an arsenical aluminum brass alloy used in power plant condensers. It is a copper-zinc base alloy (brass) per subheading note 1(a) because zinc predominates over aluminum and other elements, with tin below 3%. This tariff item covers other copper alloy tubes and pipes.

Seamless C70600 Copper-Nickel Tube

Seamless C70600 Copper-Nickel Tube is a 90/10 copper-nickel alloy used in marine cooling systems and desalination plants. It qualifies as a copper-nickel base alloy under subheading note 1(d) because nickel predominates over other elements and zinc content is ≤1%. This tariff item covers other copper alloy tubes and pipes.

Seamless C71500 70/30 Copper-Nickel Tube

Seamless C71500 70/30 Copper-Nickel Tube is a high-strength alloy used in desalination and offshore platforms. It qualifies as a copper-nickel base alloy under subheading note 1(d) because nickel predominates over other elements and zinc content is ≤1%. This tariff item covers other copper alloy tubes and pipes.

Seamless Leaded Naval Brass Tube

Seamless Leaded Naval Brass Tube (C48500) is a copper-zinc-tin-lead alloy used in marine valves and fittings. It qualifies as a copper-zinc base alloy (brass) under subheading note 1(a) because zinc predominates over other elements and tin content is below 3%. This tariff item covers other copper alloy tubes and pipes.

Seamless Naval Brass Tube C46400

Seamless Naval Brass Tube C46400 is a copper-zinc-tin alloy used for propeller shafts and marine hardware. It qualifies as a copper-zinc base alloy (brass) under subheading note 1(a) because zinc predominates over other elements and tin content is below 3%. This tariff item covers other copper alloy tubes and pipes.

Seamless Phosphor Bronze Tube C51000

Seamless Phosphor Bronze Tube C51000 is a copper-tin alloy with 5% tin, used in hydraulic systems and instruments. It qualifies as a copper-tin base alloy (bronze) under subheading note 1(b) because tin predominates over other elements and zinc content is below 10%. This tariff item covers other copper alloy tubes and pipes.