Having a wall thickness of 12.7 mm or more but less than 19 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 114.3 mm but less than 190.5 mm: > Having a wall thickness of 12.7 mm or more but less than 19 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 7304.59.80.35
SA-335 Grade P11 Seamless Alloy Steel Pipe
This seamless pipe made from chromium-molybdenum alloy steel (Grade P11) has an outside diameter of 152.4 mm and wall thickness of 15 mm, designed for high-temperature service in power plants and refineries. It falls under HTS 7304.59.80.35 due to its circular cross-section, alloy steel composition, OD between 114.3-190.5 mm, and specified wall thickness range. These pipes are produced via hot-finished or cold-drawn processes without welding.
SA-213 TP347H Seamless Alloy Steel Tube
High-temperature seamless tube of austenitic stainless alloy steel (347H grade) with 165 mm OD and 14.2 mm wall thickness, used in boiler superheaters and heat exchangers. Classified under HTS 7304.59.80.35 for its seamless construction, circular profile, alloy steel material, and precise dimension specs. Meets ASTM A213 for elevated-temperature service.
API 5L X65 Seamless Alloy Line Pipe
Seamless line pipe of X65 grade alloy steel with 168.3 mm OD and 16 mm wall thickness, certified to API 5L for oil/gas transmission pipelines. Fits HTS 7304.59.80.35 as other seamless alloy steel tube/pipe with circular section in the specified OD/wall parameters. Hot-rolled and normalized for high-strength sour service.
9Cr-1Mo-V SA-335 P91 Seamless Pipe
Advanced martensitic alloy steel pipe (P91 grade, 9Cr-1Mo-V) with 139.7 mm OD and 12.7 mm minimum wall, for supercritical power plant headers. HTS 7304.59.80.35 applies to its seamless, circular, other alloy steel construction within exact dimension limits. Normalized and tempered per ASTM A335.
Incoloy 800H Seamless Process Gas Pipe
Nickel-iron-chromium alloy (Incoloy 800H) seamless pipe, 177.8 mm OD x 15 mm wall, for high-temperature process gas service in petrochemical plants. Classifies in HTS 7304.59.80.35 as 'other alloy steel' seamless tube/pipe meeting size criteria, even with nickel content. Solution annealed for creep resistance.
SA-333 Gr6 Impact-Tested Alloy Pipe
Low-temperature seamless alloy steel pipe (Grade 6, 5% chrome) with 152 mm OD and 17 mm wall, impact-tested for arctic pipeline service. HTS 7304.59.80.35 covers its seamless circular alloy steel profile within dimension specs. Charpy V-notch tested at -46°C per ASTM A333.
17-4PH Stainless Alloy Seamless Tube
Precipitation-hardening stainless alloy (17-4PH, UNS S17400) seamless tube, 165 mm OD x 14 mm wall for offshore structural risers. Falls under HTS 7304.59.80.35 as other alloy steel seamless pipe/tube matching exact size parameters. H1150 temper condition.
Modified 9Cr-1Mo SA-387 P9C Seamless Pipe
Modified 9Cr-1Mo (P9C) seamless alloy pipe for refinery hydrocracker service, 180 mm OD x 16.5 mm wall thickness. HTS 7304.59.80.35 for seamless other alloy steel circular pipe in size range. Vacuum degassed for ultra-low impurities.
X20CrMoWV11-1 Seamless Turbine Pipe
European grade X20CrMoWV11-1 (1.4923) seamless alloy steel pipe for steam turbine casing, 142 mm OD x 13.5 mm wall. Classifies HTS 7304.59.80.35 as other seamless alloy tube/pipe meeting dimensional criteria. DIN/EN 10216-2 compliant.
Alloy 625-Like Steel Seamless Pressure Pipe
High-NiCrMo steel alloy pipe approximating Alloy 625 performance, 190 mm OD x 18 mm wall for sour gas injection. HTS 7304.59.80.35 for circular seamless other alloy steel pipe dimensions. Custom melt for H2S resistance.