3.5-inch OD 4130 Stainless Drill Pipe Premium Heavy
Heavy-duty seamless stainless steel drill pipe, 3.5-inch OD with wall thickness exceeding 9.5 mm, featuring premium threading for deep-well oil exploration. Falls under HTS 7304.22.0045 as stainless steel seamless drill pipe used in oil/gas drilling with OD not exceeding 168.3 mm.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If outside diameter exceeding 168.3 mm
Larger diameter stainless drill pipe shifts to the next size subheading within drill pipe.
If finished with threaded ends for fittings
Tube fittings of stainless steel classify under Chapter 73 fittings headings.
If for industrial gas compression rather than drilling
End-use in gas turbines changes classification to machinery-specific tubing.
Not sure which classification is right?
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Import Tips & Compliance
• Include chemical composition analysis proving stainless steel alloy status per ASTM A312 or API 5DP
• Document tool joint specifications; mismatch can lead to classification as plain tubing under 7304.41
• Avoid bulk packaging confusion—declare as individual lengths to prevent set classification errors
Related Products under HTS 7304.22.00.45
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114.3 mm OD Stainless Steel API Drill Pipe Heavy Wall
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127 mm OD Duplex Stainless Drill Tubing Heavy
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