</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →
Share:|Follow us on LinkedIn

Seamless Steel Boiler Tube 3-inch

Seamless circular tube of nonalloy steel, 3-inch diameter, designed for high-pressure boiler service. Meets ASTM A106 Grade B specifications for elevated temperature applications. Falls under 7304.39.00 as other seamless pipes not for boring into tubes.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳ChinaFree+35.0%35%
🇲🇽MexicoFree+10.0%10%
🇨🇦CanadaFree+10.0%10%
🇩🇪GermanyFree+10.0%10%
🇯🇵JapanFree+10.0%10%

More Specific Codes

This product may fall under a more specific subheading:

7304.39.00.02Having an outside diameter less than 38.1 mm
→
7304.39.00.04Having an outside diameter of 38.1 mm or more but less than 190.5 mm
→
7304.39.00.06Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm
→
7304.39.00.08Having an outside diameter exceeding 285.8 mm
→
7304.39.00.16Galvanized, having an outside diameter not exceeding 114.3 mm
→
7304.39.00.20Having an outside diameter less than 38.1 mm
→
7304.39.00.24Having a wall thickness less than 6.4 mm
→
7304.39.00.28Having a wall thickness of 6.4 mm or more but not exceeding 12.7 mm
→
7304.39.00.32Having a wall thickness exceeding 12.7 mm
→
7304.39.00.36Having a wall thickness less than 12.7 mm
→
7304.39.00.40Having a wall thickness of 12.7 mm or more but less than 19 mm
→
7304.39.00.44Having a wall thickness of 19 mm or more
→
7304.39.00.48Having a wall thickness less than 12.7 mm
→
7304.39.00.52Having a wall thickness of 12.7 mm or more but less than 19 mm
→
7304.39.00.56Having a wall thickness of 19 mm or more
→
7304.39.00.62Having a wall thickness less than 12.7 mm
→
7304.39.00.68Having a wall thickness of 12.7 mm or more but less than 19 mm
→
7304.39.00.72Having a wall thickness of 19 mm or more
→
7304.39.00.76Having a wall thickness less than 19 mm
→
7304.39.00.80Having a wall thickness of 19 mm or more
→

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

7304.51.50Same rate: 35%

If alloy steel (e.g., chromium-molybdenum)

Boiler tubes of alloy steel are under 7304.51, based on alloy content exceeding nonalloy limits.

8411.99.90Higher: 37.4% vs 35%

If imported as assembled boiler parts

If fitted with specific boiler components, may classify as parts of boilers under 8411.

7306.50.50Same rate: 35%

If welded construction

Welded tubes/pipes for boilers shift to heading 7306.

Not sure which classification is right?

Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.

Get AI-powered classificationCalculate exact duty

Import Tips & Compliance

• Provide heat treatment records and hydrostatic test results per boiler code requirements

• Confirm nonalloy status with spectrometry report to prevent alloy misclassification

• Declare exact yield strength to match statistical suffixes if applicable

Related Products under HTS 7304.39.00

Schedule 40 Seamless Steel Pipe 2-inch

A seamless steel pipe with a 2-inch nominal diameter and Schedule 40 wall thickness, made from nonalloy steel with circular cross-section. It is used for pressure piping in plumbing and industrial applications. Classified under 7304.39.00 as other seamless tubes/pipes of iron or nonalloy steel, not suitable for boring.

Seamless Hydraulic Cylinder Tube 4-inch

Precision seamless steel tube, 4-inch OD, nonalloy steel, honed interior for hydraulic cylinder barrels. Used in heavy machinery hydraulic systems. Classified in 7304.39.00 for other seamless iron/nonalloy steel pipes of circular section.

ASTM A519 Seamless Mechanical Tubing 1-1/2 inch

Seamless carbon steel mechanical tubing per ASTM A519, 1-1/2 inch OD, for machinery shafts and structural uses. Nonalloy steel with circular cross-section. Under 7304.39.00 as other seamless pipes/tubes.

Seamless Steel Fence Post Tubing 2-3/8 inch

Heavy-duty seamless nonalloy steel tubing, 2-3/8 inch OD, for chain-link fence posts and agricultural fencing. Circular cross-section suitable for structural outdoor use. HTS 7304.39.00 for other seamless pipes.

Seamless Steel Condenser Tube 1-inch

Thin-wall seamless nonalloy steel tube, 1-inch OD, for heat exchanger condensers in power plants. Designed for corrosive environments with enhanced surface treatment. Classified 7304.39.00 as other circular seamless tubes.

Schedule 80 Seamless Steel Pipe 1-1/4 inch

High-pressure seamless steel pipe, Schedule 80 thickness, 1-1/4 inch nominal, nonalloy steel for demanding fluid transport. Circular cross-section for general industrial piping. Under HTS 7304.39.00 other category.