Heavy Wall Seamless Structural Steel Pipe 6-5/8 inch
Seamless non-alloy steel pipe with 168.3 mm OD and 16.7 mm wall thickness used for structural columns, piles, and heavy fabrication. Provides superior strength-to-weight ratio for load-bearing applications in construction. Classified under HTS 7304.39.0040 based on seamless construction and dimensional specs.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If square/rectangular hollow structural section
Non-circular cross-section seamless tubes classified under heading 7306.61 as hollow structural sections.
If imported as fabricated structural assemblies
Pipe sections welded/assembled into structures classified as fabricated steel structures.
If diameter exceeds 190.5 mm
Larger OD seamless structural pipe falls under subsequent diameter reporting number.
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Import Tips & Compliance
• Provide ASTM A53/A106 or equivalent structural grade certifications with impact testing if required
• Clearly mark as 'structural pipe' vs pressure pipe on documentation to guide proper end-use classification
• Bundle in standard lifts with protective end caps to prevent damage affecting wall thickness specs
Related Products under HTS 7304.39.00.40
Seamless ASTM A106 Grade B Steel Pipe
A seamless carbon steel pipe manufactured to ASTM A106 Grade B specifications, featuring a circular cross-section with an outside diameter of 168.3 mm and wall thickness of 15 mm. This pipe is designed for high-temperature service in piping systems for refineries and power plants. It falls under HTS 7304.39.0040 due to its seamless construction, non-alloy steel composition, and precise dimensional specifications.
Heavy Wall Seamless Boiler Tube 6-inch Schedule 160
Seamless steel boiler tube with 152.4 mm outside diameter and 17.5 mm wall thickness, conforming to ASME SA192 specifications for high-pressure steam service. Used in industrial boilers and heat exchangers where structural integrity under pressure is critical. Classified under HTS 7304.39.0040 for its non-alloy steel seamless construction and specified dimensions.
API 5L Grade B Seamless Line Pipe 168.3 mm OD
Seamless line pipe manufactured to API 5L Grade B standards with 168.3 mm outside diameter and 14.3 mm wall thickness, used for oil and gas gathering lines. The heavy wall construction provides resistance to external pressure and corrosion in underground pipeline applications. Meets HTS 7304.39.0040 criteria for seamless non-alloy steel pipes of specified dimensions.
SA-53 Grade B Seamless Pressure Pipe 5-inch
ASME SA-53 Grade B seamless carbon steel pipe with 141.3 mm OD and 15.1 mm wall thickness for medium/high-pressure fluid transmission. Commonly used in process piping for chemical plants and petroleum refineries. Precisely matches HTS 7304.39.0040 specifications for wall thickness and diameter range.