Duplex 2205 Stainless OCTG Tubing with Coupling
High-strength duplex 2205 (UNS S31803) welded stainless steel tubing for deepwater oil/gas drilling, complete with integral couplings. HTS 7306.21.80.10 applies to its welded stainless construction and coupled importation for OCTG use. Provides superior corrosion and fatigue resistance in harsh offshore conditions.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded of other stainless steel types
Different stainless grades may use statistical suffixes, but core welded OCTG remains 7306.21; primarily seamless in 7306.61.
If general precision tubing, not OCTG-specific
Tubing marketed for mechanical/structural uses (not drilling) classifies as general stainless tubes under 7304.
If having attached couplings but seamless
Seamless stainless tubing with couplings uses 7306.21.50, differentiated from welded by manufacturing method.
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Import Tips & Compliance
• Submit positive material identification (PMI) test results proving duplex stainless microstructure to prevent undervaluation disputes
• Bundle in quantities matching API joint lengths (e.g
• 40ft doubles) to evidence OCTG drill string assembly
• Avoid 'coupling not integral' errors by including assembly diagrams showing field-makeup specifications
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