7 Inch P110 Welded Stainless Steel Casing
7-inch OD P110-grade equivalent welded stainless steel casing for production zones in high-pressure gas wells, with upset threaded ends for premium connections. Provides zonal isolation and corrosion protection. Categorized under 7306.21.40.00 for other stainless welded drilling casing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as tubing rather than casing
Drilling tubing (smaller, for fluid conveyance) has separate subheading from structural casing.
If produced from stainless bars and not tube mills
Cold-formed stainless bars into hollow shapes may fall under Chapter 72 if not true welded tubes.
If having threaded ends and imported for fitting assembly
Threaded pipe fittings or connectors classify under tube fittings heading.
Not sure which classification is right?
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Import Tips & Compliance
• Ensure entry summary includes yield strength specs to distinguish from lower-grade tubing
• Use FDA-equivalent documentation if for offshore platforms with food-grade fluid handling
• Monitor EU carbon border taxes if transshipping through Europe
Related Products under HTS 7306.21.40.00
API 5CT L80 Welded Stainless Steel Casing
Welded stainless steel casing pipe conforming to API 5CT L80 specifications, designed for oil and gas drilling operations to line and support well bores. It features a seamless-like weld for high-pressure environments and corrosion resistance typical of stainless steel grades like 304 or 316. Classified under 7306.21.40.00 as welded stainless steel casing, other than having circular cross sections over 406.4 mm or other specific exclusions.
9-5/8 Inch 316L Stainless Steel Welded Casing
9-5/8 inch outer diameter welded stainless steel 316L casing pipe for intermediate casing strings in oil and gas wells, providing corrosion resistance in sour gas environments. Welded construction with premium connections for structural support during drilling. Falls under HTS 7306.21.40.00 as other welded stainless steel casing for drilling.
13-3/8 Inch N80-Type Welded Stainless Casing
13-3/8 inch welded stainless steel casing equivalent to N80 grade for surface casing in onshore oil drilling, offering high collapse resistance and weld seam integrity. Used to stabilize the upper wellbore sections. HTS 7306.21.40.00 applies to this other welded stainless casing category.
20 Inch Conductor Welded Stainless Casing
20-inch welded stainless steel conductor casing for offshore oil platforms, supporting initial wellhead installation and seabed stability. Heavy wall thickness for structural loads. Fits 7306.21.40.00 as other welded stainless drilling casing.
4-1/2 Inch 13Cr Welded Stainless Casing
4-1/2 inch 13Cr (13% chromium) welded stainless steel casing for corrosive CO2 environments in enhanced oil recovery wells. Welded with low-hydrogen processes for toughness. HTS 7306.21.40.00 for other welded stainless steel oil/gas casing.