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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of alloy steel rather than non-alloy
Alloy steel seamless pipes (e.g., containing chromium/molybdenum) are classified under 7304.51 regardless of dimensions.
If imported as finished boiler components
Tubes specifically shaped/manufactured as integral parts of boilers may be classified with the machinery rather than as pipes.
If wall thickness 19 mm or greater
Thicker wall seamless pipes in same diameter range fall under subsequent wall thickness specification.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide ASME certification and hydrostatic test reports demonstrating pressure containment capability
• Label pipes with material grade, dimensions, and heat number for traceability throughout supply chain
• Avoid bundling with fittings as sets, which could trigger classification as tube fittings under different headings
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.
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.
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.