Unions
Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel: > Cast fittings: > Other: > Other > Unions
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 7307.19.90.30
Cast Steel Pipe Union 1 Inch
A cast steel union fitting designed for connecting two pipes of 1-inch diameter, allowing easy disconnection without cutting the pipe. It falls under HTS 7307.19.90.30 as a cast iron or steel pipe fitting specifically classified as a union, not elbows or couplings. Used in plumbing and industrial piping systems for maintenance.
Malleable Iron Threaded Union 2 Inch
Threaded malleable iron union for 2-inch pipes, featuring a nut and three-piece design for straight-line connections in water and gas lines. Classified under HTS 7307.19.90.30 as other cast fittings that are unions. Ideal for HVAC and fire protection systems.
Ductile Iron Grooved Union 3 Inch
Grooved-end ductile iron union fitting for 3-inch pipes, used in mechanical coupling systems for fire sprinklers and irrigation. HTS 7307.19.90.30 applies to this cast union fitting, excluding socket weld or flanged types. Provides leak-proof seals in high-flow applications.
Cast Steel Socket Weld Union 1/2 Inch
Socket weld cast steel union for 1/2-inch high-pressure pipes, common in oil and gas lines. Falls under HTS 7307.19.90.30 as a cast union fitting, distinct from buttweld elbows. Enables precise alignment and easy disassembly.
Grey Iron Pipe Union 4 Inch
Large 4-inch grey cast iron union for municipal water mains and drainage systems. Classified in HTS 7307.19.90.30 for other cast unions, providing robust, corrosion-resistant joints. Features mechanical joint ends for easy field assembly.
Cast Iron Service Union 3/4 Inch
3/4-inch cast iron service union for connecting meters in utility water services. HTS 7307.19.90.30 covers this cast union, designed for frequent access without pipe disruption. Ball or ground joint mechanism ensures tight seals.
Threaded Steel Union Adapter 1-1/2 Inch
1-1/2 inch cast steel union with reducer adapter ends for mismatched pipe sizes. Under HTS 7307.19.90.30 as other cast unions despite adapter feature. Used in process piping for chemical plants.
Black Malleable Union Long Radius 2 Inch
Black finish malleable iron union with extended nut for 2-inch pipes, providing extra leverage. HTS 7307.19.90.30 for cast unions; long radius distinguishes from standard. Common in steam heating systems.
Cast Steel Hex Union Nut Assembly 1 Inch
Complete 1-inch cast steel union with hexagonal nuts for wrench tightening. Classified HTS 7307.19.90.30 as union fittings; assembly imported together. For heavy-duty hydraulic lines.
Ductile Iron EPDM Gasket Union 2-1/2 Inch
2-1/2 inch ductile iron union with EPDM rubber gasket for sealing. HTS 7307.19.90.30 for the cast metal union; gasket integral but not changing classification. Used in chilled water systems.