Chapter 7307 — Customs Tariff Headings

Cast Iron 45-Degree Threaded Elbow

A 45-degree elbow fitting made from non-malleable cast iron with NPT threads, used for angled pipe connections in drainage systems. Its threaded design ensures secure connections and smooth flow transitions. This product falls under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Cast Iron Cross Pipe Fitting

A four-way cross pipe fitting made from non-malleable cast iron, designed for multi-directional connections in industrial drainage systems. Its robust, vibration-resistant construction makes it suitable for high-pressure applications. This product is classified under tariff item 7307.11.00 as a cast iron fitting of non-malleable cast iron.

Cast Iron Floor Drain Trap Adapter

A floor drain trap adapter made from non-malleable cast iron, used to connect floor drains to trap arms in commercial plumbing systems. Its cast construction provides durability and leak resistance in wastewater applications. This product qualifies under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Cast Iron Pipe Elbow 90 Degree

A 90-degree elbow fitting made from non-malleable cast iron, used to connect pipes at right angles in plumbing systems. Its durable cast construction ensures long-lasting performance in drainage and water supply applications. This product falls under tariff item 7307.11.00 as a cast pipe fitting of non-malleable cast iron.

Cast Iron Pipe Sleeve Coupling

A hubless sleeve coupling made from non-malleable cast iron, designed for joining no-hub drainage pipes using clamps. This fitting is widely used in modern cast iron soil pipe systems for secure, leak-free connections. It is classified under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Cast Iron Tee Pipe Fitting

A T-shaped pipe fitting made from non-malleable cast iron, used for branching pipes in sewer or storm drainage systems. Its heavy-duty construction is ideal for high-pressure connections and long-term reliability. This product qualifies under tariff item 7307.11.00 as a cast iron fitting of non-malleable cast iron.

Cast Iron Threaded Elbow Fitting

A 90-degree elbow fitting made from non-malleable cast iron with internal threads on both ends, used to connect threaded pipes at right angles in plumbing systems. Its durable construction ensures leak-free performance. This product is classified under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Cast Iron Threaded Floor Drain Coupling

A straight coupling fitting made from non-malleable cast iron with female threads on both ends, designed for connecting threaded floor drain pipes. Its robust construction ensures secure, leak-free joints in drainage systems. This product qualifies under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Cast Iron Threaded Pipe Cap Fitting

A threaded cap closure made from non-malleable cast iron, used to seal the end of threaded pipes in plumbing lines. Its design prevents leaks in temporary or permanent installations. This product falls under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Cast Iron Threaded Pipe Nipple Adapter

A short adapter nipple made from non-malleable cast iron with threads on both ends, used for pipe extensions in plumbing repairs. Its standard length of 6 inches makes it suitable for various applications. This product is classified under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Nonmalleable Cast Iron Pipe Bend 45 Degree

A 45-degree long radius bend fitting made from non-malleable cast iron, designed for smooth flow transitions in pressure piping systems. Its precision-cast construction ensures reliable performance in industrial water systems. This product falls under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Nonmalleable Cast Iron Pipe Cap

A threaded end cap fitting made from non-malleable cast iron, used to seal pipe ends in water supply lines. Its strength and durability make it suitable for buried applications. This product is classified under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Nonmalleable Cast Iron Pipe Plug

A square or hex head plug made from non-malleable cast iron, used for sealing threaded pipe ends in maintenance and pressure testing applications. Its robust construction ensures a secure seal under various conditions. This product falls under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Nonmalleable Cast Iron Reducing Coupling

A threaded reducing coupling made from non-malleable cast iron, used to join pipes of different diameters in drainage systems. Its cast construction provides corrosion resistance and durability. This product qualifies under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Nonmalleable Cast Iron Union Fitting

A shoulder union fitting made from non-malleable cast iron, designed for easy pipe disconnection in repairable plumbing lines. Its reliable sealing mechanism allows for maintenance without cutting pipes. This product is classified under tariff item 7307.11.00 as a cast iron pipe fitting of non-malleable cast iron.

Ductile Iron Bell Joint Adapter

A ductile iron bell joint adapter used to connect push-on bell pipe ends to plain end pipe sections in water distribution systems. Its cast ductile iron construction provides a secure, restrained joint suitable for legacy water infrastructure. This fitting is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Cross Fitting

A four-way cross fitting cast from ductile iron with flanged outlets, used for complex branching in water distribution networks. Its cast ductile iron body ensures high integrity under multi-directional flow conditions. This product is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Dismantling Joint

An adjustable dismantling joint made from ductile cast iron, used to facilitate easy removal of pipe sections during maintenance. It allows axial movement and disassembly without cutting pipes, making it essential for water supply lines. This fitting is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Double Flanged Adapter

A double-flanged adapter cast from ductile iron, used to transition between flanged and mechanical joint pipe ends in waterworks. It ensures a leak-proof connection in high-pressure applications. This product is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Eccentric Reducer

An eccentric reducer fitting cast in ductile iron with flanged connections, used for size transitions in drainage systems. Its design prevents air pockets in flow, maintaining system efficiency. This fitting is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Flanged Elbow 90 Degree

A 90-degree elbow fitting made from ductile iron with flanged ends, used for connecting cast iron pipes in water distribution systems. It is designed for high-pressure applications and ensures reliable directional changes. This product is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Grooved Reducing Coupling

A reducing coupling with mechanical grooved ends made from ductile cast iron, ideal for joining pipes of different diameters in fire protection systems. Its cast ductile construction provides strength and durability. This fitting is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Laterals 45 Degree

A 45-degree lateral fitting cast in ductile iron for angled service taps from water mains. It optimizes flow entry angle to minimize turbulence and is used in utility connections. This product is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Mechanical Joint Tee

A tee fitting with mechanical joint ends cast from ductile iron, used for branching water mains in municipal infrastructure. It is engineered for gasket-sealed, high-pressure connections. This fitting is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron MJ x Flange Transition

A mechanical joint to flange transition fitting cast from ductile iron, used for equipment connections in pump and valve installations. It simplifies mixed joint system integration and ensures leak-proof performance. This product is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Offset Adapter

An offset adapter fitting cast from ductile iron, used to correct pipe misalignment in installations. It provides alignment flexibility in imperfect trench conditions, ensuring proper pipe connections. This fitting is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Push-On Joint Cap

A push-on end cap fitting cast from ductile iron for sealing pipe ends in water transmission lines. It features a bell-and-spigot design for easy installation and is resistant to corrosion. This product is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Reducing Bend

A radius reducing bend fitting cast from ductile iron, combining size change and direction turn in one piece. It is used where space limits the use of straight reducers plus elbows. This fitting is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Spectacle Blind Flange

A spectacle blind flange pair cast from ductile iron for positive shutoff in piping systems. It combines blind and spacer functions in a single assembly for maintenance isolation. This product is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

Ductile Iron Tap-On Saddle

A tap-on saddle fitting cast from ductile iron for direct service connections to water mains. It provides reinforcement at the penetration point and is used in municipal tapping. This fitting is classified under tariff item 7307.19.00 as an 'Other' cast fitting of iron or steel.

17-4PH Stainless Flange

A 17-4PH precipitation hardening stainless flange for turbine housings, offering high strength. It is classified under this tariff item as a stainless steel flange.

304 Stainless Steel Weld Neck Flange

A weld neck flange made from 304 stainless steel, designed for high-pressure piping systems in chemical processing plants. It connects pipes securely via welding and is classified under this tariff item as a stainless steel flange.

316L Stainless Steel Slip-On Flange

A slip-on flange crafted from 316L stainless steel, ideal for moderate-pressure applications in food and beverage processing. It slips over the pipe end and is fillet welded, fitting this tariff item for other stainless steel flanges.

321 Stainless Steel Flange

A 321 stabilized stainless steel flange for high-temperature exhaust systems in aerospace, resisting intergranular corrosion. It is classified under this tariff item as a stainless steel flange.

AL6XN Stainless Flange

An AL6XN super austenitic stainless flange for chemical reactors, offering high corrosion resistance. It is classified under this tariff item as a stainless steel flange.

Duplex 2205 Stainless Steel Flange

A duplex 2205 stainless steel flange for offshore oil platforms, offering superior corrosion resistance in harsh marine environments. Used in weld neck configurations, it fits this tariff item for other stainless steel flanges.

Forged 304 Stainless Steel Blind Flange

A forged 304 stainless steel blind flange used to cap pipe ends, supplied in an unprocessed state with visible hammer marks. It is classified under this tariff item as a stainless steel flange not further worked after forging.

Forged Duplex Stainless Steel Flange Blank

A rough forged duplex stainless steel (2205 grade) flange blank for extreme pressure applications, unprocessed after hammer forging. It is classified under this tariff item as a stainless steel flange not further worked.

Forged Stainless Steel Weld Neck Flange

A rough forged stainless steel weld neck flange designed for welding to pipes in piping systems, left unprocessed after forging with visible forging marks. It is classified under this tariff item as a stainless steel flange not further worked.

Monel 400 Stainless Alloy Flange

A Monel 400 alloy flange (nickel-copper blend) for seawater desalination plants, resisting pitting corrosion. It is classified as a stainless steel flange under this tariff item, not wire due to dimensions.

Raw Stainless Steel Long Neck Flange

A forged stainless steel long neck flange in raw form for high-stress welding, with no post-forging treatment. It is classified under this tariff item as a stainless steel flange not further worked.

Rough Forged 316L Stainless Steel Flange

A 316L stainless steel flange forged for corrosion resistance in marine environments, supplied rough without processing. It is classified under this tariff item as a stainless steel flange not further worked after forging.

Rough Forged Stainless Steel Slip-On Flange

An unfinished forged stainless steel slip-on flange for easy pipe attachment via welding, retaining forging scale and no surface treatment. It is classified under this tariff item as a stainless steel flange not further worked.

Unfinished 304L Stainless Steel Plate Flange

A rough forged 304L stainless steel plate flange for general piping, preserved in as-forged condition. It is classified under this tariff item as a stainless steel flange not further worked after forging.

Unprocessed Stainless Steel Socket Weld Flange

A forged stainless steel socket weld flange in raw state for socket welding to pipes, with no machining applied post-forging. It is classified under this tariff item as a stainless steel flange not further worked.

1.5-Inch Stainless Steel Threaded Street Elbow

A street elbow with one male and one female NPT threaded end in stainless steel, size 1.5 inches, for tight plumbing turns. It is a threaded elbow of stainless steel, classified under tariff item 7307.22.00.

304 Stainless Threaded Sleeve Connector 1 Inch

A standard 304 stainless steel sleeve with 1-inch NPT threads on both ends, used to extend or repair stainless piping in HVAC systems. It is a threaded pipe fitting of stainless steel, classified under tariff item 7307.22.00 as a threaded sleeve.

316 Stainless Steel Coupling Sleeve 3/4 Inch

A 316 stainless steel threaded sleeve coupling for joining 3/4-inch pipes in marine and food processing applications. Its high corrosion resistance and threaded design place it under tariff item 7307.22.00 as a threaded sleeve of stainless steel.

ASME B16.11 Stainless Class 3000 Sleeve

An ASME B16.11 compliant Class 3000 stainless threaded sleeve in standard sizes, designed for high-pressure piping systems. It is a threaded pipe fitting of stainless steel, classified under tariff item 7307.22.00 as a threaded sleeve.

Cryogenic Service Stainless Sleeve 2 Inch

A low-temperature rated 304 stainless threaded sleeve for LNG transfer piping, impact tested to -196°C. As a threaded sleeve of stainless steel, it falls under tariff item 7307.22.00.

Duplex Stainless Steel Threaded Sleeve 2 Inch

A duplex 2205 stainless steel threaded sleeve coupling with 2-inch threads for severe corrosion service in offshore platforms. Its stainless steel construction and threaded design classify it under tariff item 7307.22.00.

Food Grade Electropolished SS Sleeve 1 Inch

A mirror-polished electropolished stainless sleeve for beverage bottling lines, with 1-inch threaded ends. It is a threaded sleeve of stainless steel, falling under tariff item 7307.22.00.

High-Pressure Stainless Compression Sleeve 1/2 Inch

A stainless steel sleeve with fine NPT threads for high-pressure hydraulic lines up to 10,000 psi, featuring a double ferrule design. Despite the compression application, it is a threaded sleeve of stainless steel, classified under tariff item 7307.22.00.

Left-Hand Thread Stainless Sleeve Coupling

A specialty stainless steel sleeve with left-hand threads for vibratory applications like rock crushers, preventing loosening under vibration. It is a threaded sleeve of stainless steel, classified under tariff item 7307.22.00.

Marine Grade Stainless Sleeve Coupling 4 Inch

A 254 SMO super austenitic stainless threaded sleeve for seawater desalination plants, with 4-inch threads. Its stainless steel construction and threaded design place it under tariff item 7307.22.00.

Pharmaceutical Grade SS Threaded Sleeve 3/8 Inch

An electropolished 316L stainless sleeve for cleanroom pharmaceutical piping, with 3/8-inch pharmaceutical threading. It is a threaded sleeve of stainless steel, classified under tariff item 7307.22.00.

Schedule 40 Stainless Threaded Reducing Sleeve 1x3/4 Inch

A Schedule 40 stainless steel reducing sleeve coupling connecting 1-inch to 3/4-inch threaded pipes in water treatment systems. Despite the reducing function, it is a threaded sleeve of stainless steel, falling under tariff item 7307.22.00.

Schedule 80 Stainless Heavy Wall Sleeve 1-1/2 Inch

An extra heavy Schedule 80 wall thickness stainless threaded sleeve for 1-1/2-inch steam lines, designed for high temperature and pressure service. It is a threaded sleeve of stainless steel, classified under tariff item 7307.22.00.

Stainless Steel Long-Radius Sleeve Coupling 1-1/4 Inch

An extended length stainless steel threaded sleeve coupling for 1-1/4-inch pipes, providing extra engagement length in high-pressure gas lines. It is a threaded sleeve of stainless steel, classified under tariff item 7307.22.00.