Having a wall thickness less than 12.7 mm
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel: > Other, of circular cross section, of other alloy steel: > Other: > Other: > Other: > Other > Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm: > Having a wall thickness less than 12.7 mm
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
Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Products classified under HTS 7304.59.80.60
Chrome-Moly Seamless Pipe 12-inch OD
Seamless 12-inch (304.8 mm) OD alloy steel pipe with 9 mm wall thickness, made from 5Cr-0.5Mo alloy for structural supports in refineries. Meets HTS 7304.59.80.60 criteria: circular seamless profile of alloy steel, OD 285.8-406.4 mm, wall <12.7 mm. High strength-to-weight ratio suits elevated temperature service.
Pressure Piping Alloy Steel Tube 14.5-inch OD
Seamless 14.5-inch (368 mm) OD tube from 2.25Cr-1Mo alloy steel, 10.5 mm wall, for high-pressure process piping in fertilizer plants. Matches HTS 7304.59.80.60: other alloy steel, seamless circular, specified OD range, thin wall. Provides excellent resistance to hydrogen attack.
12Cr Seamless Steel Tube 13-inch OD
Seamless 13-inch (330 mm) OD tube from 12% chromium alloy steel, 6 mm wall thickness, for desalination plant evaporators. Fits HTS 7304.59.80.60 as other alloy seamless circular tube, OD 285.8-406.4 mm, wall <12.7 mm. Martensitic structure offers superior erosion resistance in seawater.
Low-Temp Alloy Steel Pipe 14-inch OD
Seamless 14-inch OD (355.6 mm), 11.5 mm wall pipe from 3.5Ni steel alloy for LNG cryogenic piping. HTS 7304.59.80.60: alloy seamless, circular cross-section, specified OD, thin wall. Maintains ductility at -196°C for liquefied gas handling.
Martensitic Stainless Alloy Tube 15-inch OD
Seamless 15-inch (381 mm) OD martensitic alloy steel tube (13Cr-4Ni), 8 mm wall, for sour gas service tubing. Though high Cr, classified as 'other alloy' under HTS 7304.59.80.60 for seamless circular profile, OD range, thin wall. Stress corrosion cracking resistance in H2S environments.
Seamless Alloy Steel Boiler Tube 14-inch OD
A seamless tube made from alloy steel with a circular cross-section, outside diameter of 355 mm, and wall thickness of 10 mm, designed for high-pressure steam boilers in industrial power plants. It falls under HTS 7304.59.80.60 due to its seamless construction, alloy steel material, OD between 285.8 mm and 406.4 mm, and thin wall less than 12.7 mm. These tubes withstand extreme temperatures and pressures without welding seams.
Alloy Steel Heat Exchanger Tube 15-inch OD
Seamless circular tube of chrome-moly alloy steel, 380 mm OD and 8.5 mm wall thickness, used in shell-and-tube heat exchangers for petrochemical processing. Classified under HTS 7304.59.80.60 for its alloy composition, precise OD range (285.8-406.4 mm), and thin walls suitable for heat transfer efficiency. Corrosion-resistant properties make it ideal for handling hot fluids.
Alloy Steel Condenser Tube 16-inch OD
Seamless tube from 9Cr-1Mo alloy steel, 16-inch (406 mm) OD with 11 mm wall, for surface condensers in steam turbine plants. Fits HTS 7304.59.80.60 exactly: alloy steel, seamless, circular, OD ≤406.4 mm, thin wall. Enhanced thermal conductivity supports efficient steam condensation.
Superheater Seamless Alloy Tube 13.5-inch OD
High-temperature seamless tube of Grade T91 alloy steel, 342 mm OD and 7 mm wall thickness, for superheater sections in fossil fuel boilers. HTS 7304.59.80.60 applies to its seamless alloy steel construction, mid-range OD, and thin walls optimizing heat transfer. Meets rigorous creep strength requirements.
Nickel-Alloy Seamless Transfer Line Pipe 15.75-inch OD
Seamless pipe of Alloy 800H (Ni-Fe-Cr), 400 mm OD, 9.8 mm wall thickness, for ethylene cracking furnace transfer lines. HTS 7304.59.80.60 covers this 'other alloy steel' seamless tube in the 285.8-406.4 mm OD range with thin walls. Carburization resistance enables high-temperature hydrocarbon service.