PP Lab Fume Hood Duct Pipe
Rigid polypropylene duct pipe for laboratory fume hood exhaust systems, resistant to acid vapors. HTS 3917.22.00.00 applies to its rigid tube form from propylene homopolymer. Used in chemical processing labs.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If supplied as pre-fabricated lab fittings
Other plastic articles for lab use may not qualify as simple tubes.
If imported as parts of lab fume hoods
End-use as machine parts supersedes material form.
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Import Tips & Compliance
• Provide fume hood compatibility specs to justify lab-grade classification
• Document wall thickness >5mm for rigid status
• Separate flanges/elbows for potential Free (C) import
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