API 5L Grade B Steel Casing Pipe
Welded steel casing pipe made from nonalloy steel, with a circular cross section exceeding 406.4 mm external diameter, designed for oil and gas drilling operations to line boreholes and stabilize well walls. Classified under HTS 7305.20.4000 as 'other' casing of iron or nonalloy steel, not seamless. Meets API 5L standards for strength and durability in downhole environments.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If seamless construction
Seamless casing pipes of nonalloy steel fall under heading 7304, regardless of diameter, as they lack welds or rivets.
If used for line pipe in pipelines
Reclassified as line pipe if primarily for conveying oil/gas through pipelines rather than drilling casing.
If made of stainless steel
Stainless steel versions change to 7305.31 due to alloy composition exceeding nonalloy steel limits.
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Import Tips & Compliance
• Verify API 5L certification and mill test reports (MTRs) for compliance with ASTM A53/A106 standards to avoid customs holds
• Ensure accurate measurement of external diameter (>406.4 mm) and wall thickness documentation to confirm 'other' casing classification
Related Products under HTS 7305.20.40.00
16-Inch OD Welded Oil Well Casing
Heavy-duty welded casing tube of nonalloy steel with 16-inch (406.4+ mm) external diameter, used in oil drilling to prevent borehole collapse and protect aquifers. Falls under HTS 7305.20.4000 as 'other' non-seamless casing for drilling applications. Features high collapse resistance for intermediate casing strings.
18.5-Inch Surface Casing Tube
Welded surface casing pipe of iron/nonalloy steel, 18.5-inch OD exceeding 406.4 mm, used in gas well drilling to isolate freshwater zones and provide blowout protection. Fits HTS 7305.20.4000 as other non-seamless casing for drilling. Corrosion-resistant coating standard for longevity.
ASTM A252 Grade 2 Drilling Casing
Welded ASTM A252 Grade 2 steel casing pipe with circular cross section over 16 inches (406.4 mm) OD, for oilfield drilling to line wells and support formations. HTS 7305.20.4000 applies to this nonalloy 'other' casing, distinguished by electric resistance welding (ERW). Ideal for intermediate and production casing.
22-Inch OD ERW Oil Casing Pipe
Electric resistance welded (ERW) casing pipe of nonalloy steel, 22-inch external diameter, for stabilizing oil well bores during drilling. Classified in HTS 7305.20.4000 as other riveted/welded casing over 406.4 mm for oil/gas. High yield strength for deep wells.
Nonalloy Steel Production Casing
Welded production casing strings of nonalloy steel, OD >16 inches, used post-drilling to facilitate oil/gas flow while isolating zones. HTS 7305.20.4000 for other non-seamless iron/steel casing in drilling. Premium grade for long-term well integrity.
17-Inch Intermediate Casing Pipe
17-inch OD welded intermediate casing of nonalloy steel for multi-stage oil drilling support. HTS 7305.20.4000 classification.