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SITCSection 6
U.S. imports of large-diameter non-seamless iron & steel tubes & pipes (nes, od over 406.4 mm) (SITC 67939) totaled $26K in April 2026, traded with 6 countries.
Large-Diameter Non-Seamless Iron & Steel Tubes & Pipes (NES, OD Over 406.4 mm) imports of $26K in April 2026 ran 22% below the year-to-date monthly average of $33K.
Last updated: April 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.
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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.
Monthly import values over time
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