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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If outside diameter exactly 215.9 mm or more but still thick-walled
The hierarchy splits at 215.9 mm OD even within thick wall alloy steel casing.
If longitudinal welded construction
Welded oil/gas casing of alloy steel is in 7305.12, separate from seamless 7304.
If imported with attached pump jacks or wellhead equipment
Assembled with pumps, it becomes a parts of fuel handling machinery under Chapter 84.
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Import Tips & Compliance
• Certify exact chemistry for C110 alloy (higher Cr/Mo content) to distinguish from standard carbon steels
• Provide thread type specs (e.g
• BTC) to confirm drilling casing use, not line pipe
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.
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.
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.