Having a wall thickness of 12.7 mm or more
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel: > Casing, tubing and drill pipe, of a kind used in drilling for oil or gas: > Other: > Casing: > Of other alloy steel: > Threaded or coupled > Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm: > Having a wall thickness of 12.7 mm or more
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Products classified under HTS 7304.29.31.40
13-3/8 inch 72# L-80 Type 13Cr Casing
Seamless alloy steel oil well casing pipe with 13-3/8 inch OD (339.7 mm adjusted to hierarchy range), 72 lb/ft weight, L-80 grade with 13% chromium content for corrosion resistance in sour gas environments. Features API STC threaded couplings and wall thickness exceeding 12.7 mm, designed for oil and gas drilling casing strings. Classified under 7304.29.31.40 due to its seamless construction, alloy steel composition, coupled ends, and specified dimensions for heavy-duty downhole use.
10-3/4 inch 85# P-110 Casing with BTC Coupling
Heavy-wall seamless P-110 grade alloy steel casing for high-pressure oil wells, 10-3/4 inch OD (273 mm), 85 lb/ft, with buttress thread couplings (BTC) and wall thickness over 12.7 mm. Used in drilling for oil or gas to line boreholes and isolate formations. Fits 7304.29.31.40 for its alloy steel, seamless, threaded/coupled design in the specified OD and thick-wall range.
9-5/8 inch 53.5# Q-125 Casing Pipe
Seamless Q-125 high-strength alloy steel casing with 9-5/8 inch OD (244.5 mm), 53.5 lb/ft nominal weight ensuring wall thickness ≥12.7 mm, equipped with premium EUE threaded couplings. Applied in deep high-pressure gas wells for structural support. Matches HTS 7304.29.31.40 precisely for heavy-wall, coupled alloy steel oil/gas casing in the defined size range.
11-3/4 inch 68# T-95 Casing with VAM Coupling
Premium VAM TOP threaded and coupled seamless T-95 alloy steel casing, 11-3/4 inch OD (298.5 mm), 68 lb/ft, wall thickness exceeding 12.7 mm for extreme service wells. Essential for casing in challenging drilling environments like HP/HT reservoirs. HTS 7304.29.31.40 applies to its seamless alloy steel, heavy-wall, coupled specs for oil/gas.
12-1/4 inch 75# C-110 Sour Service Casing
C-110 grade seamless alloy casing optimized for H2S sour service, 12-1/4 inch OD (311.2 mm within hierarchy), 75 lb/ft weight with thick walls ≥12.7 mm, full API STC couplings. Used to case wells with corrosive hydrogen sulfide content. Classified in 7304.29.31.40 for threaded, coupled, heavy-wall alloy steel oilfield casing.
13 inch 60# L-80 9CrMo Casing
9Cr-1Mo alloy steel seamless casing, L-80 grade, 13 inch OD (330.2 mm), 60 lb/ft, wall thickness over 12.7 mm, with integral premium threaded couplings. Designed for high-temperature oil/gas drilling applications. Meets 7304.29.31.40 criteria for heavy-duty coupled alloy casing.
14 inch 72# P-110 Heavy Wall Casing
Extra heavy 14 inch OD (355.6 mm adjusted), 72 lb/ft P-110 seamless alloy casing with 12.7+ mm walls and EUE couplings for structural support in large diameter wells. Critical for conductor and surface casing strings in offshore drilling. HTS 7304.29.31.40 for its precise size, coupling, and alloy specs.