Seamless Alloy Steel Line Pipe for Sour Service
Designed for transporting sour gas in petroleum applications, this seamless pipe uses alloy steel resistant to hydrogen sulfide corrosion. With 16-inch OD (406.4 mm) and 22 mm wall thickness, it precisely matches HTS 7304.59.80.70 criteria for other alloy steel seamless tubes exceeding 285.8 mm OD.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not alloy steel (carbon steel)
Carbon steel seamless pipes with identical dimensions classify under 7304.29, as alloy steel requires specific alloying elements above defined limits.
If Specific end-use as finished gas cylinder parts may shift to Chapter 84 machinery parts.
If OD exceeds 406.4 mm
Larger diameter pipes in the same alloy steel seamless category fall into 7304.59.60 subheading.
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Import Tips & Compliance
• Include NACE MR0175/ISO 15156 certification for sour service to support material classification and quality compliance
• Document hydrostatic test results as proof of seamless integrity; customs may request for high-pressure pipe verification
• Beware of alloy content thresholds—pipes with excessive chromium may be reclassified as stainless
Related Products under HTS 7304.59.80.70
API 5L Grade X65 Seamless Alloy Steel Pipe
This seamless pipe made from high-strength alloy steel meets API 5L X65 specifications for oil and gas transmission lines. It features a circular cross-section with an outside diameter of 355.6 mm (14 inches) and a wall thickness of 25 mm, classifying it under HTS 7304.59.80.70 due to its alloy steel composition, seamless construction, and specified dimensions.
High-Pressure Seamless Alloy Steel Pipe 14-inch OD
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Seamless 16-inch Alloy Steel Structural Hollow Section
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Thick-Wall Seamless Alloy Steel Casing for Oil Wells
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Chrome-Moly Seamless Pipe for Power Plant Boilers
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