Alloy Steel Slip-On Flange 300#
Slip-on flange of chrome-moly alloy steel, inside diameter 4 inches (102 mm), pressure rated 300#, used in boiler and pressure vessel connections. Classified under HTS 7307.91.50.30 due to its alloy steel construction (except stainless) and ID below 360 mm. It slips over the pipe end and is fillet welded for secure attachment.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If stainless steel composition
Stainless variants shift to 7307.92 flange provisions excluding alloy steel.
If over 360 mm inside diameter
Size threshold determines statistical breakouts in 7307.99.
If imported as integral part of a valve assembly
If permanently attached to valves or pumps, may classify as machinery parts under Chapter 84.
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Import Tips & Compliance
• Obtain material certification distinguishing from stainless; measure ID precisely for customs declaration
• Avoid classifying as 'parts of valves' if sold standalone
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