Orifice Steel Flange
A specialized steel flange with integrated restriction for flow measurement in metering stations, used in oil and gas. Falls under HTS 7307.91.50 as an other steel flange with precision-engineered bores.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 5.5% | +35.0% | 40.5% |
| 🇲🇽Mexico | 5.5% | +10.0% | 15.5% |
| 🇨🇦Canada | 5.5% | +10.0% | 15.5% |
| 🇩🇪Germany | 5.5% | +10.0% | 15.5% |
| 🇯🇵Japan | 5.5% | +10.0% | 15.5% |
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 with integrated flow meter
Flanges containing measuring instruments classify under Chapter 90.
If forged orifice design
High-precision orifice flanges typically forged, eligible for that subheading.
If imported with attached pipe
Pipe sections with integral flanges classify as welded pipes.
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 bore size and beta ratio specifications for accurate technical declarations
• Calibrate with flow coefficient data for end-use verification
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