化工设备纸垫片
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 8484200000 | 38.9% | CN | US | Official Doc |
| 4823908000 | 35.0% | CN | US | Official Doc |
| 4823906000 | 35.0% | CN | US | Official Doc |
| 8484900000 | 37.5% | CN | US | Official Doc |
| 4823908000 | 35.0% | CN | US | Official Doc |
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🧪 Chemical Equipment Paper Gaskets
🌐 HS Code Classification & Tariff Guide | 2026 Latest Customs Rules | Expert Compliance Strategy
📌 One Product, Multiple HS Codes — Understand the Nuances to Avoid Costly Mistakes!
📦 1. Product Definition & Classification: What Is a "Paper Gasket for Chemical Equipment"?
A paper gasket used in chemical equipment is a sealing component made from paper-based materials (e.g., plain paper, coated paper, or coated paperboard), designed to prevent leakage between flanges in piping, valves, reactors, or pressure vessels in chemical processing systems.
⚠️ Critical Distinction:
- If the gasket is purely paper-based and used for mechanical sealing, it falls under 4823.90.80.00 or 4823.90.60.00
- If it's part of a mechanical seal assembly (e.g., combined with metal, rubber, or other materials), it may be classified under 8484.20.00.00 or 8484.90.00.00
- Do NOT assume all paper gaskets are the same — material composition and function determine the HS Code!
📊 2. HS Code Breakdown (2026 Updated Tariff Schedule)
| HS Code | Product Description | Key Features | Tax Rate | Is It Correct? |
|---|---|---|---|---|
8484.20.00.00 |
Paper gaskets used in mechanical seals; made of paper, combined with other materials | Part of a mechanical sealing system; not standalone | 38.9% | ✅ Yes — if part of a composite seal |
4823.90.80.00 |
Paper gaskets, plain paper, used for mechanical sealing | Pure paper material; no coating; general-purpose sealing | 35.0% | ✅ Yes — for non-coated paper gaskets |
4823.90.60.00 |
Gaskets made from coated paper or coated paperboard, used for sealing | Coated surface for chemical resistance or durability | 35.0% | ✅ Yes — if coated material is used |
8484.90.00.00 |
Other mechanical seals, including paper-metal combinations | Not limited to paper; includes mixed-material seals | 37.5% | ✅ Yes — if it's a mechanical seal with paper as a component |
4823.90.80.00 |
Repeated entry — same as above | Same product, same classification | 35.0% | ✅ Valid (duplicate in data) |
🔍 Why Multiple HS Codes?
- Material type (plain vs. coated) →4823.90.60.00vs4823.90.80.00
- Function (standalone gasket vs. part of mechanical seal) →4823.90vs8484.20
- Composition (pure paper vs. paper-metal combo) → affects tariff and classification
💰 3. 2026 Tariff Breakdown (U.S. Import Rules – China Origin)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: November 10, 2025 (including future imports)
🎯 1. 8484.20.00.00 — Paper Gaskets in Mechanical Seals
| Item | Detail |
|---|---|
| Base Duty | 3.9% (ad valorem) |
| USITC Section 301 Tariff | +25.0% (from U.S. Trade Act 301) |
| Section 122 Tariff (IEEPA) | +10.0% (International Emergency Economic Powers Act) |
| Total Effective Duty | 38.9% |
| Tax Calculation | CIF Value × 38.9% |
| De Minimis Exemption? | ❌ No (denied under U.S. law) |
| Legal Basis Path | IEEPA:9903.01.25 → IEEPA:9903.01.24 → USITC:8484.20.00.00 → FOOTNOTE:9903.88.01 |
📌 Explanation:
- The 25% USITC tariff applies to all goods from China under Section 301 (trade imbalance). - The 10% IEEPA tariff is a national security-based surcharge. - Total: 38.9% — one of the highest for industrial components.
🎯 2. 4823.90.80.00 — Plain Paper Gaskets (No Coating)
| Item | Detail |
|---|---|
| Base Duty | 0.0% |
| USITC Section 301 Tariff | +25.0% |
| Section 122 Tariff (IEEPA) | +10.0% |
| Total Effective Duty | 35.0% |
| Tax Calculation | CIF Value × 35.0% |
| De Minimis Exemption? | ❌ No |
| Legal Basis Path | IEEPA:9901.25 → IEEPA:9903.01.24 → USITC:4823.90.80.00 → FOOTNOTE:9903.88.01 |
📌 Note:
- Even though base duty is 0%, the 25% + 10% = 35% still applies due to trade policies. - This is still extremely high — not a "low-duty" item!
🎯 3. 4823.90.60.00 — Coated Paper Gaskets
| Item | Detail |
|---|---|
| Base Duty | 0.0% |
| USITC Section 301 Tariff | +25.0% |
| Section 122 Tariff (IEEPA) | +10.0% |
| Total Effective Duty | 35.0% |
| Tax Calculation | CIF Value × 35.0% |
| De Minimis Exemption? | ❌ No |
| Legal Basis Path | IEEPA:9901.25 → IEEPA:9903.01.24 → USITC:4823.90.60.00 → FOOTNOTE:9903.88.01 |
📌 Key Point:
- Coating does NOT reduce tariff — it only affects material classification. - Same tax rate as plain paper gaskets.
🎯 4. 8484.90.00.00 — Other Mechanical Seals (Paper-Metal Combinations)
| Item | Detail |
|---|---|
| Base Duty | 2.5% |
| USITC Section 301 Tariff | +25.0% |
| Section 122 Tariff (IEEPA) | +10.0% |
| Total Effective Duty | 37.5% |
| Tax Calculation | CIF Value × 37.5% |
| De Minimis Exemption? | ❌ No |
| Legal Basis Path | IEEPA:9903.01.25 → IEEPA:9903.01.24 → USITC:8484.90.00.00 → FOOTNOTE:9903.88.01 |
📌 Why Higher?
- 2.5% base duty is added to the 35% (25% + 10%) — total 37.5%. - This code applies when the gasket is part of a larger mechanical seal system, even if paper is the main material.
🛠️ 4. Customs Clearance Best Practices (Pro Tips to Avoid Penalties)
✅ 1. Must-Have Documentation (No Exceptions!)
| Document | Required? | Why It Matters |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Shows material (paper, coated, etc.), thickness, dimensions |
| ✅ Material Test Report (Chemical Resistance) | ✔️ | Proves suitability for chemical environments |
| ✅ Product Photos (Clear, with labels) | ✔️ | Shows construction: pure paper vs. metal layer |
| ✅ Circuit/Assembly Diagram (if applicable) | ✔️ | Helps prove if it's part of a mechanical seal |
| ✅ Commercial Invoice | ✔️ | Must state: “Paper Gasket for Chemical Equipment” |
| ✅ Certificate of Origin (CO) | ✔️ | If from Vietnam/Mexico, may qualify for lower tariff |
| ✅ Packing List | ✔️ | Avoids split-shipment risks |
✅ 2.申报技巧（申报口诀）
🔥 “Material First, Function Second, Composite = Mechanical Seal!”
| Scenario | Correct HS Code | Wrong Code | Risk |
|---|---|---|---|
| Pure paper gasket, no coating | 4823.90.80.00 |
8484.20.00.00 |
→ Higher tariff |
| Coated paper gasket | 4823.90.60.00 |
4823.90.80.00 |
→ Wrong material class |
| Paper + metal layer in seal | 8484.20.00.00 or 8484.90.00.00 |
4823.90.80.00 |
→ Major penalty risk! |
| Used in reactor flange sealing | 8484.20.00.00 |
4823.90.80.00 |
→ Misclassification = 38.9% vs 35.0% → $10k+ extra |
✅ 3. Special Cases & Solutions
| Situation | Recommended Action |
|---|---|
| Gasket is part of a mechanical seal kit | Use 8484.20.00.00 or 8484.90.00.00 — do not split |
| Gasket is sold separately | Use 4823.90.80.00 or 4823.90.60.00 — based on material |
| Gasket is custom-made for chemical plant | Provide technical specs — helps avoid "generic" classification |
| Gasket is from Vietnam/Mexico | Apply for CO — may qualify for 0% tariff under trade agreements |
🌍 5. Global Market Tariff Comparison (2026)
| Country | Recommended HS Code | Tariff | Certification | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 8484.20.00.00 / 4823.90.80.00 |
35.0%–38.9% | FCC/CE/RoHS | No de minimis! |
| 🇨🇳 China | 4823.90.80.00 |
5% | CCC | No extra tariffs |
| 🇪🇺 EU | 4823.90.80.00 |
0% (if CE) | CE | No IEEPA/301 |
| 🇦🇺 Australia | 4823.90.80.00 |
5% | RCM | No extra taxes |
| 🇯🇵 Japan | 4823.90.80.00 |
0% | PSE | No additional duties |
📌 Insight:
- Only the U.S. imposes 35%+ tariffs on paper gaskets from China. - China, EU, Japan, Australia have much lower or zero tariffs — consider shifting logistics.
🚨 6. Common Mistakes & Costly Pitfalls (Real Cases)
❌ Mistake 1: Classifying a paper-metal composite gasket as 4823.90.80.00
👉 Result: 35.0% instead of 38.9% — but still wrong! → Audit risk, penalties
❌ Mistake 2: Splitting a mechanical seal kit into "paper gasket" + "metal ring"
👉 Result: Each part taxed at ~89.5% → Total: 179%+ — huge loss!
❌ Mistake 3: Using "gasket" as generic name without material description
👉 Result: Customs may assume it's metal-based → higher tariff or rejection
✅ Correct Way:
“Paper Gasket, Coated, for Chemical Reactor Flange, 100mm Diameter, 1mm Thickness, Made from Coated Paperboard, Used in Corrosive Environments”
🎯 7. Final Verdict: Precision Saves Money!
🎯 Remember the Golden Rule:
🔹 “If it’s part of a mechanical seal → Use 8484.20/90.00”
🔹 “If it’s standalone paper → Use 4823.90.60/80.00”
🔹 “Don’t split components — they’re one unit!”💡 Pro Tip:
- Apply for Advance Ruling (Pre-Decision) with U.S. CBP before shipment. - Use a customs broker with chemical equipment experience — this is not a standard gasket!
📣 Act Now!
📞 Contact a U.S. Customs Broker + HS Code Pre-Ruling Service
🚀 Avoid $10k+ in overpayment, delays, or seizure
✨ Your Gasket’s HS Code Decides Your Profit Margin!
💼 One wrong code = 3.9% more in duty. One right code = $50k saved per shipment.
🌟 Professional Clearance Starts with Accurate Classification!
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About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) — Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) — More specific grouping within the chapter
- Subheading (6 digits) — Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) — Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate — The standard duty rate applied to WTO members
- General rate — Applied to countries without trade agreements
- Trade remedy duties — Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.