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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of stainless steel
Stainless steel casing falls under the stainless steel subheading 7304.29.10 rather than other alloy steel.
If welded rather than seamless
Welded casing pipes are classified in 7304.39, separate from seamless pipes in 7304.2.
If imported as unfinished tubing components
Less finished hollow profiles or parts for drilling may shift to Chapter 73 heading 7306 for other steel tubes.
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Import Tips & Compliance
• Obtain API 5CT certification documentation to verify seamless construction and alloy steel composition meeting L80/13CR specs
• Provide mill test certificates (MTC) confirming wall thickness ≥12.7 mm and exact outside diameter under 215.9 mm for customs classification
• Avoid misclassification by specifying 'casing for oil/gas drilling' on commercial invoice; watch for overages in OD measurements
Related Products under HTS 7304.29.41.20
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.
8-5/8 inch 40 lb/ft C110 Alloy Casing for Gas Wells
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