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A36 Steel Flange 360 mm Minimum ID

ASME SA36 structural steel flange precisely 360 mm ID for building service piping. HTS 7307.91.5050 designation for minimum size threshold iron/nonalloy flanges. Common in construction for fire sprinkler systems.

Import Duty Rates by Country of Origin

Origin Country	MFN Rate	Ch.99 Surcharges	Total Effective Rate
🇨🇳China	5.5%	+35.0%	40.5%
🇲🇽Mexico	5.5%	+10.0%	15.5%
🇨🇦Canada	5.5%	+10.0%	15.5%
🇩🇪Germany	5.5%	+10.0%	15.5%
🇯🇵Japan	5.5%	+10.0%	15.5%

Alternative Classifications

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

7307.91.50Same rate: 40.5%

If measured ID 359 mm or less

Even 1 mm below threshold shifts to smaller flange statistical reporting.

7308.90.95Lower: 35% vs 40.5%

If part of structural assemblies

Flanges welded into building frameworks classify as structures vs. standalone fittings.

7326.90Lower: 12.9% vs 40.5%

If prefabricated with bolts/gaskets

Complete bolting sets with flanges become 'other steel articles' rather than fittings.

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Import Tips & Compliance

• A36 certs acceptable but verify tensile strength >58 ksi meets flange pressure requirements

• UL/FM listings required for fire protection system approval

Related Products under HTS 7307.91.50.50

Carbon Steel Flange 18-Inch ID

A large carbon steel flange with an inside diameter of 450 mm, designed for connecting pipes in industrial water supply systems. It falls under HTS 7307.91.5050 as a flange of iron or nonalloy steel with an inside diameter exceeding 360 mm. These are typically used in heavy-duty piping for their durability and weldability.

Nonalloy Steel Weld Neck Flange 400 mm ID

Weld neck flange of nonalloy steel with 400 mm inside diameter, featuring a long tapered hub for high-pressure pipeline connections in oil refineries. Classified under HTS 7307.91.5050 due to its iron/nonalloy steel construction and large bore size. Provides superior strength for butt-weld attachment.

Heavy Duty Iron Flange 14-Inch Schedule 40

Cast iron flange equivalent in nonalloy steel with 355 mm ID for schedule 40 pipes, used in municipal water treatment plants. Meets HTS 7307.91.5050 as iron/nonalloy steel flange over 360 mm ID threshold. Offers corrosion resistance for wastewater systems.