Chrome-Moly Steel Blind Flange 600#
Blind flange constructed from ASTM A182 F11 chrome-moly alloy steel, 6-inch ID (152 mm), class 600, used to seal pipe ends in high-temperature refineries. HTS 7307.91.50.30 applies as it's an alloy steel flange (non-stainless) under 360 mm ID. Provides full sealing without internal bore.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If inside diameter exceeds 360 mm
Larger blind flanges use the 7307.91.30.30 or equivalent size-based subheading.
If stainless steel material
Material composition dictates heading exclusion for stainless in flange provisions.
If imported in tubes/sections over 16mm wall, not fittings
Unfinished alloy steel tubes could classify under Chapter 73 tubes if not machined as fittings.
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Import Tips & Compliance
• Require heat treatment records for alloy verification; declare pressure class if relevant for valuation
• Pitfall: confusing with spectacle blinds which may be 7307.99 if not flanged
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