Standard International Trade Classification
U.S. exports of Large-Diameter Non-Seamless Iron & Steel Tubes & Pipes (NES, OD Over 406.4 mm) (SITC 67939) totaled $393K in August 2026, exported to 12 countries.
Last updated: August 2026 dataCovering iron and steel tubes and pipes produced by methods other than seamless or conventional welding — such as riveting or spiral forming — with an external diameter exceeding 406.4 mm, this residual subheading captures specialty fabrication methods used in older infrastructure and certain civil engineering applications. The 'other than seamless' scope is broad, encompassing riveted, spiral-welded, and other non-standard joining techniques, which can complicate classification when production records are incomplete. As with other large-diameter steel products, Section 232 tariff measures apply, and importers should document the manufacturing process clearly.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The category encompasses riveted, spiral-welded (helical seam), and other non-standard joining methods that do not qualify as seamless but may also not meet the definition of conventional longitudinal electric-resistance or submerged-arc welded pipe. Production records identifying the seam type and joining method are essential for accurate classification.
Spiral-welded (helical seam) pipe is formed by coiling a steel strip at an angle and welding along the helical seam, while longitudinally welded pipe has a single straight seam running the length of the pipe. Both are 'other than seamless,' but their dimensional capabilities and typical end-uses differ. Classification between the welded NES subheadings (67933 vs. 67939) depends on whether the product meets the specific welded-pipe definition or falls into the broader residual.
Basic heading 67939 · $393K of $13.0B
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ImportsExports
Imports
—YoY · free account
Exports
$393KYoY · free account
Low of 10 reported months · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $954K of Large-Diameter Non-Seamless Iron & Steel Tubes & Pipes (NES, OD Over 406.4 mm) and exported $10.9M.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026 · imports 10 of 12 months reported. Source: U.S. Census Bureau.
Exports · August 2026
destination
United Kingdom and Turkey together take 60% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.