Large Diameter Alloy Welded Pipe for Offshore Oil Platforms
Longitudinally welded high-strength alloy steel pipe over 406.4 mm OD for jacket legs and risers in offshore oil platforms. Classified in HTS 7305.31.60.90 as other large-diameter welded alloy tubes. Designed to withstand marine corrosion and high cyclic loads.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If seamless electric resistance welded (ERW)
ERW seamless construction, even circular, moves to 7304 for seamless tubes.
If pre-fabricated into platform equipment structures
Assembled into equipment classifies as other structures under 7308.
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Import Tips & Compliance
• API 5L certification mandatory; include DNV or ABS approvals for marine use
• Specify if normalized or quenched/tempered for proper alloy identification
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