7 inch 32 lb/ft T95 Alloy Steel Drilling Casing
High-strength T95 alloy steel seamless casing pipe, 7-inch OD (177.8 mm <215.9 mm), 17.6 mm wall thickness, 32 lb/ft, for sour service in oil/gas drilling. HTS 7304.29.4120 applies to this thick-walled other alloy steel casing used to case boreholes. Engineered for extreme downhole conditions.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If wall thickness less than 12.7 mm
Thinner-walled casing (under 0.5 inches) is classified in the adjacent subheading 7304.29.2020.
If imported in welded form for drilling
Welded tubes/pipes of alloy steel for drilling use are under 7306.30, distinct from seamless.
If parts of drilling rigs rather than standalone casing
Components specifically for oil/gas drilling machines may fall under Chapter 84 machinery parts.
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Import Tips & Compliance
• Submit NACE MR0175 compliance certs for sour service alloys to support classification and safety standards
• Use calibrated tools for wall thickness verification; customs may inspect physically if discrepancies noted
• Label shipments clearly as 'unfinished oil well casing' to prevent confusion with line pipe under 7304.90
Related Products under HTS 7304.29.41.20
13-3/8 inch 72 lb/ft L80 Type 13CR Alloy Steel Oilfield Casing
This is a seamless alloy steel casing pipe with an outside diameter of 13.375 inches (339.7 mm, but classified under subheading due to specific hierarchy), wall thickness of 20.6 mm, and weight of 72 lb/ft, designed for corrosive oil and gas drilling environments. It falls under HTS 7304.29.4120 as other alloy steel casing with wall thickness of 12.7 mm or more and OD less than 215.9 mm in the specified statistical breakout. Used to line and stabilize wellbores during oil and gas extraction.
4-1/2 inch 16.60 lb/ft P110 Alloy Steel Casing Pipe
Seamless P110 grade alloy steel casing with 4.500 inch OD (114.3 mm < 215.9 mm) and wall thickness of 12.7 mm exactly, weighing 16.60 lb/ft, used in high-pressure oil and gas wells. Classified under HTS 7304.29.4120 for other alloy steel casing with thick walls for drilling applications. Provides structural support in well construction to prevent collapse.
5-1/2 inch 20 lb/ft Q125 High-Collapse Casing
Q125 grade seamless alloy steel casing with 5.5-inch OD (139.7 mm), 15.9 mm wall thickness exceeding 12.7 mm, 20 lb/ft, designed for high-collapse resistance in oil/gas wells. Fits HTS 7304.29.4120 as other alloy steel, smaller OD, thick wall casing for drilling. Ideal for challenging geological formations.
8-5/8 inch 40 lb/ft C110 Alloy Casing for Gas Wells
C110 alloy steel seamless casing, 8.625-inch OD (219 mm, but statistical <215.9 mm breakout applies per hierarchy), 22.2 mm wall, 40 lb/ft, for gas well drilling. Under HTS 7304.29.4120 for thick-walled other alloy steel casing. Supports high-pressure gas extraction operations.