3.5-inch API Spec 5DP Stainless Drill Tubing
Seamless stainless steel drill tubing with 88.9 mm OD and 7.3 mm wall thickness, compliant with API 5DP standards for oilfield drilling. Classified under HTS 7304.22.0030 as stainless steel drill pipe with OD ≤168.3 mm and wall ≤9.5 mm used in oil or gas drilling. It includes upset ends for welding tool joints.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If wall thickness exceeds 9.5 mm but OD still ≤168.3 mm
Thicker wall drill pipe moves to 7304.23.0030 within the same drill pipe category.
If OD exceeds 168.3 mm
Larger diameter stainless drill pipe classifies under 7304.19.0030.
If imported in threaded lengths as finished casing rather than drill pipe
Threaded and coupled products may be seen as casing under Chapter 73 threaded tubes.
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Import Tips & Compliance
• Obtain API 5DP certification documents; customs often requires proof of compliance for drill pipe
• Label clearly as 'drill pipe for oil/gas' to distinguish from casing or tubing
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