Unmachined Alloy Steel Long Weld Neck Flange
Long weld neck flange forged from non-stainless alloy steel for extreme high-pressure sour gas service. Classified HTS 7307.91.30.00 as no post-forging work done, rough neck intact. Extends hub reduces stress concentration at vessel connections.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 3.2% | +35.0% | 38.2% |
| 🇲🇽Mexico | 3.2% | +10.0% | 13.2% |
| 🇨🇦Canada | 3.2% | +10.0% | 13.2% |
| 🇩🇪Germany | 3.2% | +10.0% | 13.2% |
| 🇯🇵Japan | 3.2% | +10.0% | 13.2% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If stainless for corrosive environments
Corrosion resistance dictates stainless classification.
If integral to chemical reactor equipment
Machinery-specific parts under Chapter 84/85.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Include NACE MR0175 compliance docs for sour service alloys
• Declare forging yield losses; affects value for duty
Related Products under HTS 7307.91.30.00
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Forged Alloy Steel Weld Neck Flange
A forged flange made from alloy steel (not stainless) with a long tapered hub for welding to pipes, used in high-pressure oil and gas pipelines. It falls under HTS 7307.91.30.00 as it is not machined, tooled, or otherwise processed after forging, meeting the 'rough' flange criteria. These flanges provide strong, leak-proof connections in demanding industrial applications.
Rough Forged Alloy Steel Slip-On Flange
A basic slip-on flange forged from non-stainless alloy steel, designed to slide over pipe ends before welding, ideal for moderate-pressure chemical processing lines. Classified under HTS 7307.91.30.00 because it remains unprocessed post-forging, retaining forging scale and rough surfaces. Provides cost-effective connections without requiring precise pipe alignment.
Unprocessed Alloy Steel Blind Flange
Forged blind flange from alloy steel (excluding stainless), used to seal pipe ends in pressure vessel systems for refineries. It qualifies for HTS 7307.91.30.00 as it is supplied rough-forged without machining or tooling. Essential for safe isolation in high-stress environments.
Forged Alloy Steel Socket Weld Flange
Rough-forged socket weld flange of non-stainless alloy steel for inserting pipe ends into recessed sockets before welding, common in power plant steam lines. HTS 7307.91.30.00 applies due to no post-forging processing, preserving raw forged texture. Offers fatigue resistance in cyclic pressure systems.
Rough Alloy Steel Orifice Flange Pair
Pair of forged alloy steel flanges (non-stainless) designed for mounting flow meters between them, used in metering stations for natural gas. Falls under HTS 7307.91.30.00 as rough-forged without machining. Provides accurate pressure differential measurement in pipelines.