9% Nickel Alloy Steel Seamless Pipe for LNG Storage
Seamless pipe of 9% nickel alloy steel with wall thickness over 4 mm, engineered for cryogenic LNG storage tanks. It qualifies under HTS 7304.90.30.00 as a thick-walled seamless tube of alloy steel for extreme low-temperature service.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If wall thickness less than 4 mm
Thinner walls move to 7304.90.50 subheading for alloy steel seamless tubes.
If threaded or coupled ends
Tube fittings with threads classify under 7307 as pipe fittings.
If not qualifying as alloy steel
Insufficient alloy elements defaults to carbon steel thick-walled seamless.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Certify nickel content ≥8% for alloy steel status; test reports essential
• Specify seamless nature in invoices to distinguish from welded cryogenic pipes
Related Products under HTS 7304.90.30.00
Alloy Steel Seamless Pipe for Oil & Gas Drilling API 5CT L80
Seamless alloy steel pipe (API 5CT L80 grade) with wall thickness ≥4 mm, used in oil and gas well casings and tubing. HTS 7304.90.30.00 applies to its seamless, thick-walled alloy steel construction for high-strength downhole applications.
Chrome-Moly P91 Seamless Pipe for Power Plant Superheaters
Seamless P91 grade (9Cr-1Mo-V) alloy steel pipe, wall ≥4 mm, for superheater tubes in fossil fuel power plants. Fits HTS 7304.90.30.00 as thick-walled seamless alloy steel tube for high-temperature steam service.
Alloy Steel Seamless Tube for Automotive Axle Shafts
Seamless alloy steel tube (e.g., 4340 grade) with ≥4 mm walls for manufacturing heavy-duty axle shafts in trucks. HTS 7304.90.30.00 due to seamless, thick-walled alloy construction prior to machining.
17-4PH Stainless Alloy Seamless Pipe (Alloy Steel Classification)
Seamless 17-4PH precipitation-hardening alloy with wall >4 mm for aerospace and valve bodies. While high Cr, classified as alloy steel tube under HTS 7304.90.30.00 if not meeting stainless criteria in specific contexts.
Alloy Steel Seamless Boiler Tube ASTM A335 P11
This seamless tube made from 1.25% chromium-molybdenum alloy steel (ASTM A335 P11 grade) is designed for high-pressure boiler applications, with a wall thickness exceeding 4 mm. It falls under HTS 7304.90.30.00 as a seamless tube of alloy steel with thick walls, suitable for elevated temperature service in power plants.
ASTM A213 T22 Seamless Alloy Steel Heat-Exchanger Tube
Seamless tube of 2.25% chromium-1% molybdenum alloy steel (ASTM A213 T22) for heat exchangers, featuring wall thickness of 4 mm or more. Classified under HTS 7304.90.30.00 due to its seamless construction, alloy composition, and thick walls for high-temperature fluid transfer.