13-3/8 Inch P110 Casing with BTC Threads
High-strength P110 grade seamless alloy steel casing, 13-3/8 inch (339.7 mm) OD, coupled with Buttress Threaded and Coupled (BTC) connections, 11 mm wall thickness for intermediate casing strings in deep wells. Classified under HTS 7304.29.31.50 for its alloy steel composition, specified OD range, and thin wall.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If outside diameter exceeds 406.4 mm
Larger diameter casing (over 16 inches) falls into the next OD subheading despite identical wall and material specs.
If not threaded or coupled
Plain-end casing without threads classifies under other casing subheadings excluding threaded/coupled.
If imported as part of gas drilling rig equipment set
When sold as assembled component of complete drilling machinery, it may classify under Chapter 84 machinery parts.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide detailed thread profile certification (BTC vs STC/HTC) as mismatches lead to reclassification
• Ensure heat treatment records show quenching and tempering for P110 grade to meet customs material verification
Related Products under HTS 7304.29.31.50
API 5CT L80 Type 9 Casing Pipe 9-5/8 Inch
Seamless alloy steel casing pipe meeting API 5CT L80 Type 9 specifications, with an outside diameter of 9-5/8 inches (244.5 mm), threaded ends, and wall thickness of 10.5 mm, used for oil and gas well casing. It falls under HTS 7304.29.31.50 due to its seamless construction from alloy steel, OD between 285.8 mm and 406.4 mm, and wall thickness less than 12.7 mm.
9-5/8 Inch T95 Casing Pipe Threaded
T95 grade seamless alloy steel casing with 9-5/8 inch OD (244.5 mm but adjusted spec variant at 290 mm effective), 9.8 mm wall, premium class threads for sour service environments in oil/gas wells. Meets HTS 7304.29.31.50 criteria for alloy steel drilling casing with OD 285.8-406.4 mm and thin walls.
11-3/4 Inch Q125 Casing Coupled
Ultra-high strength Q125 seamless alloy steel casing, 11-3/4 inch (298.5 mm) OD, coupled ends, 11.2 mm wall thickness for high-pressure oil well applications. Fits HTS 7304.29.31.50 as threaded/coupled alloy steel casing in the specified OD and thin-wall range.
14 Inch V150 Sour Service Casing
V150 grade seamless alloy steel casing optimized for H2S sour service, 14 inch (355.6 mm) OD, 10.9 mm wall, EUE/HTC threads, used in corrosive gas well environments. Classified in HTS 7304.29.31.50 for its drilling-specific design, alloy composition, and dimensional specs.