Unmachined Alloy Steel Long Weld Neck Flange
A long weld neck flange forged from non-stainless alloy steel for extreme high-pressure sour gas service. With no post-forging work done and the rough neck intact, it is classified under 7307.91.00, with the extended hub reducing stress concentrations.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | +50.0% | 50% |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the long weld neck flange has been machined or faced
Machined flanges are classified under other fittings of iron or steel.
If the flange is made of stainless steel
Stainless steel flanges have a separate classification.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the long weld neck flange is not machined or processed after forging to maintain classification
• Provide a certificate of analysis for the alloy steel, especially for sour gas service
• Be prepared to demonstrate compliance with Canadian sour service standards (e.g
• NACE MR0175) if requested
Related Products under Tariff item 7307.91.00
Alloy Steel Forged Swivel Flange
A swivel flange assembly forged from non-stainless alloy steel, designed to rotate for bolt alignment during shipbuilding pipe installation. Its rough-forged state, with no post-forging machining, places it under tariff item 7307.91.00 as a flange of iron or steel.
Basic Forged Alloy Steel Lap Joint Flange
A forged lap joint flange from non-stainless alloy steel, used with stub ends for easy alignment in low-pressure water systems. Supplied rough-forged with rough edges intact, it is classified under 7307.91.00 as a flange of iron or steel.
Carbon Steel Raised Face Flange
A carbon steel flange with a raised sealing surface for gasket compression in bolted connections. As a standard flange in process industries, it is classified under 7307.91.00 as a flange of iron or steel.
Carbon Steel Slip-On Flange
A slip-on carbon steel flange that slides over the pipe end and is welded in place, commonly used in low-pressure applications like water systems. It is classified under 7307.91.00 as a flange of iron or steel.
Forged Alloy Steel Socket Weld Flange
A rough-forged socket weld flange of non-stainless alloy steel, designed for inserting pipe ends into recessed sockets before welding. Commonly used in power plant steam lines, it falls under 7307.91.00 as a flange in its unprocessed forged state.
Forged Alloy Steel Weld Neck Flange
A forged alloy steel weld neck flange with a long tapered hub for welding to pipes, used in high-pressure oil and gas pipelines. As it is not machined, tooled, or otherwise processed after forging, it is classified under 7307.91.00.