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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If galvanized after seamless manufacture
Seamless pipes with zinc coating >360g/m² classified as other surfaced pipes under 7306.30.
If outside diameter under 114.3 mm
Smaller OD seamless pipes of same wall thickness range fall under prior diameter subheading.
If imported as heat exchanger tube bundles
Tubes specifically manufactured/configured for heat exchangers classified as parts of machinery.
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Import Tips & Compliance
• Submit material certificates showing tensile strength minimum 60 ksi and yield 35 ksi per SA-53 specs
• Document surface condition (black/oiled/galvanized) as galvanizing may trigger different treatment subheadings
• Separate structural tubing shipments from pressure pipe to avoid blending tariff treatments
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