Longitudinally welded
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
Duty Rate (from China)
Products classified under Tariff item 7305.31.00
24-inch Stainless Steel LSAW Pipe for Oil Pipeline
This is a longitudinally submerged arc welded (LSAW) stainless steel pipe with a 609.6 mm external diameter, designed for offshore oil transport lines. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm. The stainless steel material provides corrosion resistance for offshore service.
Abrasion-Resistant Alloy Pipe for Mining Tailings
Extra-thick wall longitudinally welded alloy pipe exceeding 406.4 mm OD for tailings slurry transport in mining. The hardfacing alloy resists wear, and the large circular cross-section meets the criteria of tariff item 7305.31.00. This pipe is designed for abrasive and demanding mining applications.
Alloy Steel Large Diameter Welded Pipe for Water Transmission
A longitudinally welded alloy steel pipe exceeding 406.4 mm external diameter, designed for municipal water supply and transmission mains. The welded circular construction meets the specifications of tariff item 7305.31.00. This pipe provides reliable performance for large-scale water distribution systems.
Alloy Steel LSAW Pipe for Offshore Platform Risers
> A submerged arc longitudinally welded (LSAW) alloy steel pipe exceeding 406.4 mm in diameter for riser applications in offshore oil platforms. It is a large-diameter, circular welded tube of alloy steel, designed for high-pressure and corrosive environments.
Alloy Steel Mega Pipe for Urban Sewage Tunnels
> An extra-large longitudinally welded alloy steel pipe (over 48 inches OD) for main sewage conveyance tunnels. It is a welded circular alloy tube exceeding 406.4 mm, with stainless-clad options for durability.
Alloy Steel Pipe for Industrial Slurry Lines
This is a large-diameter longitudinally welded alloy steel pipe, exceeding 406.4 mm in external diameter, designed to transport abrasive slurries in mining operations. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm.
Alloy Steel Welded Pipe for Natural Gas Transmission
This is a longitudinally welded alloy steel pipe with an external diameter exceeding 406.4 mm, engineered for high-pressure natural gas transmission lines. Its circular cross-section and welded construction qualify it for tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm.
Conical Steel Pathway Light Pole Tube
> A longitudinally welded steel tube with a conical taper, the base external diameter exceeding 406.4 mm. It is engineered as the primary structural pole component for pedestrian pathway lighting, providing support and elevation for luminaires.
Cooling Water Return Pipe 60-inch Welded
> A 60-inch (1524 mm) diameter longitudinally welded non-alloy steel pipe used for industrial cooling water return lines in power plants. Its oversized circular welded design facilitates efficient water flow and durability in demanding environments.
Corrosion-Resistant Alloy Steel Pipe for Desalination Plants
This is a longitudinally welded duplex alloy steel pipe exceeding 406.4 mm in external diameter, used for seawater intake in desalination plants. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm. The UNS S31803 grade provides chloride resistance for marine environments.
Duplex Stainless Steel 18-inch Welded Pipe
This is a duplex 2205 stainless steel longitudinally welded pipe with a 457 mm external diameter, designed for high-strength subsea oil and gas flowlines. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm. The duplex grade provides high strength and corrosion resistance.
Grade 316L Stainless Large Diameter Welded Pipe
Grade 316L stainless steel pipe, longitudinally welded, with an external diameter of 450 mm, designed for marine desalination and chemical processing. Its high molybdenum content provides enhanced corrosion resistance in chloride-rich environments. This product falls under tariff item 7305.31.00 as a welded tube of iron or steel with a circular cross-section exceeding 406.4 mm.
Heavy Mining Conveyor Gallery Support Pipe
This is a large-diameter longitudinally welded alloy steel pipe, exceeding 406.4 mm, used as structural support in conveyor gallery trusses for open-pit mines. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm.
Heavy Wall Alloy Steel Welded Pipe for Pressure Vessels
This is a heavy-wall longitudinally welded alloy steel pipe with an external diameter exceeding 406.4 mm, fabricated for use as pressure vessel shells. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm.
High-Pressure Alloy Steel Welded Pipe for Power Plant Cooling
This is a longitudinally welded alloy steel pipe with an external diameter exceeding 406.4 mm, designed for circulating water in thermal power plant cooling systems. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm. The alloy composition resists thermal fatigue.
HVDC Cable Protection Alloy Steel Pipe
This is a large-diameter longitudinally welded alloy steel pipe, exceeding 406.4 mm, designed to protect submarine HVDC cables on the seabed. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm. The pipe can be concrete-filled for additional protection.
Industrial Slurry Pipeline 28-inch Welded Steel
> A 28-inch (711 mm) longitudinally welded pipe of non-alloy steel for transporting slurry in mining operations. The large diameter and welded construction ensure robust performance under abrasive conditions, with optional abrasion-resistant lining.
Large Diameter Alloy Steel Pipe for Water Transmission Mains
This is a longitudinally welded alloy steel pipe exceeding 406.4 mm in external diameter, designed for durable water supply trunk lines in municipal systems. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm. The alloy composition provides corrosion resistance for water service.
Large Diameter Welded Steel Sluice Gate Pipe 48-inch
> A longitudinally welded pipe from non-alloy steel with an external diameter of 1219 mm (48 inches), used in irrigation and flood control sluice systems. Its welded construction and circular profile over 406.4 mm ensure structural integrity for water management.
Large Stainless Steel Welded Stack Pipe
Large stainless steel stack pipe, 610 mm in external diameter, longitudinally welded, intended for industrial chimney exhaust systems handling acidic gases. The corrosion-resistant stainless steel construction ensures durability in harsh flue gas environments. This product is classified under tariff item 7305.31.00 as a welded tube of iron or steel with a circular cross-section exceeding 406.4 mm.
LNG Terminal Cryogenic Alloy Steel Pipe
This is a longitudinally welded 9% nickel alloy steel pipe exceeding 406.4 mm in external diameter, designed for LNG tank vaporizers and transfer lines. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm. The 9% Ni grade provides cryogenic toughness.
Longitudinally Welded Alloy Steel Pipe for Oil Pipelines
This is a large-diameter longitudinally welded alloy steel pipe, with an external diameter exceeding 406.4 mm, designed for high-pressure oil transportation. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm.
Longitudinally Welded Stainless Steel Pipe 24-inch OD
Longitudinally welded stainless steel pipe with a 610 mm external diameter, suitable for high-pressure fluid transport in industrial applications. The circular cross-section and welded construction meet the criteria of tariff item 7305.31.00. This pipe is designed for demanding service conditions requiring corrosion resistance and structural integrity.
Longitudinally Welded Steel Water Pipe 24-inch
> A large-diameter, longitudinally welded pipe made of non-alloy steel with an external diameter of 610 mm (24 inches), used for municipal water distribution systems. It is a welded tube with a circular cross-section exceeding 406.4 mm, ensuring reliable water supply.
Municipal Sewer Force Main Pipe 54-inch
> A 54-inch (1372 mm OD) longitudinally welded non-alloy steel pipe for pressurized sewer force mains. Built for high-pressure wastewater transport, its large circular welded construction meets the requirements of this tariff item.
Nonalloy Steel Penstock Pipe 36-inch Welded
> A longitudinally welded, 914 mm diameter pipe of iron or non-alloy steel for low-pressure penstocks in small hydroelectric setups. It is a large, circular, welded tube not primarily for oil or gas, balancing strength and cost.
Refinery Flare Stack Alloy Steel Riser Pipe
This is a high-temperature alloy steel longitudinally welded pipe exceeding 406.4 mm in external diameter, used for flare stack risers in oil refineries. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm. The 5Cr-0.5Mo grade provides high-temperature resistance.
Stainless Steel 20-inch OD Welded Duct Pipe
Large 508 mm OD longitudinally welded stainless steel pipe used as industrial ducting for corrosive gas exhaust systems. The welded circular construction and large diameter classify this product under tariff item 7305.31.00. Its corrosion-resistant properties make it suitable for aggressive chemical environments.
Stainless Steel Large Diameter Welded Pipe for Water Treatment
Corrosion-resistant longitudinally welded stainless steel pipe, 500 mm OD, designed for municipal water treatment and desalination plants. The large circular cross-section and welded construction meet the specifications of tariff item 7305.31.00. This pipe ensures reliable performance in water handling applications.
Stainless Steel Large Penstock Pipe Section
Longitudinally welded stainless steel penstock pipe section, 500 mm OD, for hydroelectric turbine water conduits. The large circular cross-section and welded construction classify this product under tariff item 7305.31.00. Designed to withstand high water pressure in power generation applications.
Stainless Steel LWD Pipe for Power Plant Cooling
Longitudinally welded diameter (LWD) stainless pipe, 16-inch OD equivalent (406.5+ mm), for thermal power plant cooling water intake. The circular cross-section and welded construction meet the criteria of tariff item 7305.31.00. This pipe is designed for large-volume water transport in power generation facilities.
Structural Alloy Steel Large Pipe for Bridge Construction
This is a longitudinally welded high-strength low-alloy (HSLA) steel pipe exceeding 406.4 mm in external diameter, used as structural elements in bridge piers and supports. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm.
Super Duplex Stainless Welded Large Pipe
Super duplex 2507 stainless steel longitudinally welded pipe, 24-inch OD, offering extreme corrosion resistance for seawater injection lines. The large circular cross-section and welded construction classify this product under tariff item 7305.31.00. This pipe is engineered for offshore and marine applications requiring high strength and durability.
Tapered High Mast Lighting Pipe
> A tapered, longitudinally welded steel pipe with an external diameter exceeding 406.4 mm, used as the mast for high-mast lighting systems on highways and parking lots. Its conical shape reduces wind load while supporting multiple floodlights.
Tapered Steel Floodlight Support Pipe
> A heavy-duty, longitudinally welded steel pipe with tapered ends and an external diameter over 406.4 mm, used as the vertical support in floodlighting towers for stadiums and large areas. The taper provides structural efficiency and stability.
Tapered Steel Lamp Post Tube
> A longitudinally welded steel tube with a tapered design and circular cross-section exceeding 406.4 mm in external diameter, specifically engineered as the main structural component for street lamp posts. It provides the necessary height and support for lighting fixtures.
Welded Nonalloy Steel Culvert Pipe 30-inch
> A heavy-duty, longitudinally welded steel pipe of non-alloy steel with a 762 mm external diameter, designed for stormwater drainage and culverts in road construction. Its large circular cross-section and welded construction ensure durability.
Welded Steel Intake Pipe 42-inch for Pumping Stations
> A 42-inch (1067 mm OD) longitudinally welded non-alloy steel pipe for water intake at pumping stations. It is a large welded circular tube of iron or non-alloy steel, supporting reliable water supply infrastructure.
Welded Tapered Streetlight Pole Shaft
> A large-diameter (over 406.4 mm) longitudinally welded steel tube that tapers from base to top, designed exclusively as the shaft for outdoor streetlight poles. It provides structural support for lighting systems in illuminating applications.
Wind Farm Foundation Alloy Steel Transition Pipe
This is a longitudinally welded alloy steel pipe exceeding 406.4 mm in external diameter, connecting the monopile to the tower in offshore wind foundations. Its circular cross-section and welded construction place it under tariff item 7305.31.00, which covers other welded tubes and pipes of iron or steel with circular cross-sections exceeding 406.4 mm. The API 2W Grade 50 provides offshore-grade strength.