Of alloy steel
Other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross sections, the external diameter of which exceeds 406.4 mm, of iron or steel: > Other, welded: > Longitudinally welded: > Other: > Of alloy steel
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 7305.31.60
Alloy Steel Mega Pipe for Urban Sewage Tunnels
Extra-large longitudinally welded alloy steel pipe (>48" OD) for main sewage conveyance tunnels. HTS 7305.31.60: welded circular alloy tubes >16". Stainless-clad for durability.
Wind Farm Foundation Alloy Steel Transition Pipe
Longitudinally welded alloy steel pipe >406.4mm connecting monopile to tower in offshore wind foundations. HTS 7305.31.60 large welded tubes. API 2W Grade 50.
Refinery Flare Stack Alloy Steel Riser Pipe
High-temperature alloy steel longitudinally welded pipe >16" for flare stack risers in oil refineries. HTS 7305.31.60: other large welded alloy circular. 5Cr-0.5Mo grade.
HVDC Cable Protection Alloy Steel Pipe
Concrete-filled capable alloy steel pipe >406.4mm for protecting submarine HVDC cables on seabed. HTS 7305.31.60 welded large alloy tubes.
LNG Terminal Cryogenic Alloy Steel Pipe
9%Ni alloy steel longitudinally welded pipe >16" for LNG tank vaporizers/transfer lines. HTS 7305.31.60 large welded alloy circular.
Heavy Mining Conveyor Gallery Support Pipe
Alloy steel longitudinally welded large pipe (>406mm) for elevated conveyor gallery trusses in open-pit mines. HTS 7305.31.60: structural large tubes welded alloy.
Longitudinally Welded Alloy Steel Pipe for Oil Pipelines
This large-diameter pipe, with an external diameter over 406.4 mm, is made from alloy steel and longitudinally welded for high-pressure oil transportation. It falls under HTS 7305.31.60 due to its circular cross-section, welded construction, and alloy steel material exceeding the size threshold. Primarily used in midstream oil and gas infrastructure.
Alloy Steel Welded Pipe for Natural Gas Transmission
A longitudinally welded pipe of alloy steel with external diameter exceeding 406.4 mm, engineered for high-pressure natural gas lines. Classified under HTS 7305.31.60 for its other welded, circular cross-section design in large sizes. Essential for long-distance gas pipeline networks.
Large Diameter Alloy Steel Pipe for Water Transmission Mains
Longitudinally welded alloy steel pipe over 406.4 mm OD, designed for durable water supply trunk lines in municipal systems. HTS 7305.31.60 applies to its circular, large-scale welded construction from alloy steel. Corrosion-resistant for long-term infrastructure use.
Alloy Steel LSAW Pipe for Offshore Platform Risers
Submerged arc longitudinally welded (LSAW) alloy steel pipe exceeding 406.4 mm diameter for riser applications in offshore oil platforms. Fits HTS 7305.31.60 as other large-diameter, circular welded tubes of alloy steel. Built for harsh marine environments.
Heavy Wall Alloy Steel Welded Pipe for Pressure Vessels
Longitudinally welded alloy steel pipe with OD >406.4 mm and thick walls for fabrication into pressure vessel shells. HTS 7305.31.60 due to welded circular cross-section in large sizes of alloy steel. Used in petrochemical reactor construction.
Alloy Steel Pipe for Industrial Slurry Lines
Large-diameter longitudinally welded alloy steel pipe over 406.4 mm for transporting abrasive slurries in mining operations. Classed in HTS 7305.31.60 for its other welded, circular alloy steel design. Abrasion-resistant grades like Hardox.
Structural Alloy Steel Large Pipe for Bridge Construction
Longitudinally welded alloy steel tubes exceeding 406.4 mm OD used as structural elements in bridge piers and supports. HTS 7305.31.60 covers these large circular welded pipes of alloy steel. High-strength low-alloy (HSLA) grades.
High-Pressure Alloy Steel Welded Pipe for Power Plant Cooling
Alloy steel pipe longitudinally welded with OD >406.4 mm for circulating water in thermal power plant cooling systems. Under HTS 7305.31.60 as other large welded circular tubes. Resistant to thermal fatigue.
Corrosion-Resistant Alloy Steel Pipe for Desalination Plants
Longitudinally welded duplex alloy steel pipe over 406.4 mm for seawater intake in desalination facilities. HTS 7305.31.60 for large-diameter welded alloy tubes with circular section. UNS S31803 grade for chloride resistance.