Nonalloy Steel Long Neck Flange 24-Inch ID
Extended hub long neck flange nonalloy steel with 610 mm ID for cryogenic gas lines. HTS 7307.91.5050 for large nonalloy flanges with specialized hub geometry. Reduces stress concentration in extreme temperature service.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If cold-finished seamless pipe sections
Long neck hub resembling pipe sections may classify as tubes if not fully flanged.
If integral to check valves
Valve body flanges classify as valve parts when functionally integral.
If chrome-moly P11 material
Elevated chromium (1-1.5%) makes it alloy steel regardless of size.
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Import Tips & Compliance
• Charpy impact test results mandatory for sub-zero applications (min 27J at -46°C)
• Hub length dimension critical for long neck identification vs. standard weld neck
• Magnetic particle inspection reports for hub-to-flange transition zones
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