24-Inch OD Seamless 9% Chromium Alloy Steel Pipe
Seamless pipe with 24-inch (609.6 mm) OD from 9Cr-1Mo alloy steel for high-temperature refinery service. Fits HTS 7304.59.80.80 as other alloy steel seamless tube, circular, >406.4 mm OD. Resists creep in steam lines.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If supplied in coil form before final sizing
Hollow drill bars/coils of alloy steel classify in Chapter 72, not fabricated pipes.
If cold-drawn with thick walls
Cold-drawn seamless ferritic alloy pipes over certain wall thickness go to 7304.41.
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Import Tips & Compliance
• Specify exact alloy (e.g
• P91/Grade 91) in entry docs—critical for 'other alloy steel' proof
• Require heat treatment records showing normalization/tempering for pressure service
• Beware valuation disputes—use transaction value based on mill contracts, not list prices
Related Products under HTS 7304.59.80.80
42-Inch OD Seamless Alloy Steel Pipe for Oil Drilling
This seamless pipe, made from alloy steel with an outside diameter of 42 inches (1066.8 mm), is designed for high-pressure oil and gas drilling operations. It falls under HTS 7304.59.80.80 due to its seamless construction, circular cross-section, alloy steel material, and OD exceeding 406.4 mm. These pipes withstand extreme downhole conditions without welds that could fail.
48-Inch OD Seamless Alloy Steel Line Pipe
A 48-inch (1219.2 mm) OD seamless pipe from alloy steel, used for transporting oil and gas in pipelines. Classified under HTS 7304.59.80.80 for its seamless nature, circular profile, other alloy steel composition, and large diameter over 406.4 mm. Ideal for sour service environments with high corrosion resistance.
60-Inch OD Seamless Alloy Steel Casing Pipe
Heavy-wall seamless alloy steel pipe with 60-inch (1524 mm) OD for well casing in oil extraction. Meets HTS 7304.59.80.80 as a seamless, circular cross-section tube of other alloy steel exceeding 406.4 mm diameter. Provides structural support in boreholes resisting collapse.
36-Inch OD Seamless Alloy Steel Structural Pipe
Seamless alloy steel pipe, 36-inch (914.4 mm) OD, for offshore platform structural columns. Under HTS 7304.59.80.80 for seamless, circular, other alloy steel with OD >406.4 mm. High strength-to-weight ratio suits marine environments.
72-Inch OD Seamless Alloy Steel Pile Pipe
Extra-large 72-inch (1828.8 mm) OD seamless alloy steel pipe driven as foundation piles for bridges. HTS 7304.59.80.80 applies to its seamless circular form, alloy composition, exceeding 406.4 mm diameter. Engineered for axial load bearing.
30-Inch OD Seamless Alloy Steel Booster Pipe
30-inch (762 mm) OD seamless pipe from nickel-alloyed steel for water injection boosters in oilfields. Under HTS 7304.59.80.80 for seamless alloy steel tube >406.4 mm OD, circular section. Enhances pressure in secondary recovery.