Having a wall thickness of 19 mm or more
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel: > Other, of circular cross section, of iron or nonalloy steel: > Other > Other: > Other: > Having an outside diameter exceeding 114.3 mm but less than 190.5 mm: > Having a wall thickness of 19 mm or more
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 7304.39.00.44
Seamless ASTM A106 Grade B Steel Pipe
A seamless carbon steel pipe manufactured to ASTM A106 Grade B specifications, featuring a circular cross section with an outside diameter of 168.3 mm and wall thickness of 25 mm. It is designed for high-temperature service in piping systems for oil refineries and power plants. Classified under HTS 7304.39.0044 due to its seamless construction, nonalloy steel material, specified diameter range exceeding 114.3 mm but less than 190.5 mm, and wall thickness of 19 mm or more.
API 5L Grade B Seamless Line Pipe
Seamless line pipe conforming to API 5L Grade B standards, with 152.4 mm outside diameter and 22 mm wall thickness, used for oil and gas transmission pipelines. Made from nonalloy steel for structural integrity under pressure. Fits HTS 7304.39.0044 for its seamless iron/nonalloy steel construction, circular profile in the 114.3-190.5 mm OD range, and thick 19+ mm walls.
Heavy Wall Seamless Boiler Tube
Seamless boiler tube with 177.8 mm OD and 28 mm wall thickness, made from nonalloy steel for high-pressure steam systems in industrial boilers. Precision-engineered for heat resistance and structural strength. Classified in HTS 7304.39.0044 matching its seamless, circular, nonalloy steel profile with OD 114.3-190.5 mm and wall ≥19 mm.
Thick-Wall Seamless Structural Steel Pipe
Seamless nonalloy steel pipe for structural columns, 165.1 mm OD with 24 mm wall thickness, used in heavy construction frameworks. Provides superior load-bearing capacity due to thick walls. HTS 7304.39.0044 applies for seamless iron/nonalloy steel tubes of circular section, OD 114.3-190.5 mm, wall ≥19 mm.
High-Pressure Seamless Hydraulic Cylinder Tube
Seamless tube for hydraulic cylinders, 139.7 mm OD and 21 mm wall thickness, nonalloy steel for heavy machinery applications. Honed interior for piston sealing under extreme pressures. Matches HTS 7304.39.0044: seamless, circular, iron/nonalloy steel, OD 114.3-<190.5 mm, wall ≥19 mm.
Seamless Pressure Piping for Refineries
Heavy-duty seamless pipe for refinery process piping, 184.2 mm OD with 32 mm wall thickness from nonalloy steel. Engineered for corrosive hydrocarbon service at elevated temperatures. HTS 7304.39.0044 for seamless nonalloy steel circular tubes in specified OD/wall dimensions.
Extra Heavy Seamless Steel Casing
Seamless nonalloy steel casing for structural piling, 159 mm OD and 20 mm wall thickness for foundation support in construction. Thick walls provide exceptional collapse resistance. Classifies under HTS 7304.39.0044 as seamless circular iron/nonalloy steel tube with OD 114.3-190.5 mm and ≥19 mm wall.