Found 5 matching results
(CN → US)
| HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
|---|---|---|---|---|---|
| 7318290000 | Doc | 107.8% | CN | US | 2025-05-12 |
| 3926904590 | Doc | 58.5% | CN | US | 2025-05-12 |
| 9405920000 | Doc | 58.7% | CN | US | 2025-05-12 |
| 3926904510 | Doc | 58.5% | CN | US | 2025-05-12 |
| 6909191000 | Doc | 55.0% | CN | US | 2025-05-12 |
Gasket
A gasket is a mechanical seal that fills the space between two mating surfaces, preventing leakage of contained fluids or gases under pressure. It maintains a seal by deformation, typically by the compression of the gasket material itself.
Materials
Gaskets are manufactured from a wide variety of materials, chosen based on the application's temperature, pressure, and chemical compatibility requirements. Common materials include:
- Rubber: (e.g., Nitrile, EPDM, Silicone, Neoprene) - Cost-effective, flexible, and suitable for low-to-moderate temperature and pressure applications.
- Fiber: (e.g., Non-Asbestos Fiber, Cellulose) - Used in applications requiring high temperature resistance and good compression recovery.
- Metal: (e.g., Steel, Copper, Aluminum) - Suitable for high-pressure, high-temperature, and corrosive environments. Often used as reinforcement layers in composite gaskets.
- PTFE (Teflon): Excellent chemical resistance and a wide temperature range, though less resilient than some other materials.
- Graphite: High-temperature resistance and good chemical compatibility.
- Composite Materials: Combinations of materials (e.g., metal core with a graphite or PTFE facing) to achieve specific performance characteristics.
Purpose
The primary purpose of a gasket is to:
- Prevent Leakage: Maintain the integrity of a sealed system by preventing the escape of fluids or gases.
- Isolate Components: Separate different parts of a system to prevent contamination or mixing of fluids.
- Maintain Pressure: Withstand internal pressure without deformation or failure.
- Provide a Tight Seal: Compensate for imperfections in mating surfaces.
Function
Gaskets function by:
- Conforming to Surface Irregularities: The gasket material deforms under compression to fill gaps and irregularities on the mating surfaces.
- Creating a Barrier: The compressed material forms a tight barrier preventing the passage of fluids or gases.
- Resisting Degradation: The gasket material resists chemical attack, thermal degradation, and mechanical wear to maintain its sealing properties over time.
Usage Scenarios
Gaskets are found in a vast array of applications, including:
- Automotive: Engine head gaskets, oil pan gaskets, exhaust gaskets, fuel system gaskets.
- Plumbing: Flange gaskets for pipes, faucets, and valves.
- Industrial Machinery: Pumps, compressors, valves, heat exchangers.
- HVAC Systems: Ductwork, refrigerant lines.
- Electronics: Sealing enclosures and components.
- Aerospace: Engine components, fuel tanks.
Common Types
- Flat Gaskets: The most common type, cut from sheet material.
- O-Rings: Circular gaskets used in grooves to create a seal.
- Spiral Wound Gaskets: Constructed from alternating layers of metal and filler material, suitable for high-pressure applications.
- Die-Cut Gaskets: Cut to specific shapes and sizes using a die.
- Ring Gaskets: Used in flanged connections, often with a groove in the flange.
- Full Face Gaskets: Cover the entire flange surface.
- Cut Gaskets: Custom-cut gaskets made to specific dimensions.
Gaskets are joints typically used to create a seal between two surfaces to prevent leakage. They can be made from various materials including metal sheeting, rubber, and plastics, and are utilized across numerous industries for applications requiring fluid or gas containment.
The following HS codes are relevant to gaskets, based on the provided information:
- 8484100000: This code covers gaskets and similar joints of metal sheeting combined with other material or of two or more layers of metal. The basic duty is 2.5%, with an additional 25.0% duty, increasing to 30.0% after April 2, 2025, resulting in a total tariff of 57.5%.
- 8484900000: This code is for "Other" gaskets not specifically classified elsewhere. It also carries a basic duty of 2.5%, with an additional 25.0% duty, increasing to 30.0% after April 2, 2025, for a total tariff of 57.5%.
- 4016931010: This code specifically covers other articles of vulcanized rubber (other than hard rubber), used in automotive goods of chapter 87, specifically O-Rings. The basic duty is 2.5%, with an additional 25.0% duty, increasing to 30.0% after April 2, 2025, resulting in a total tariff of 57.5%.
- 4016935010: This code covers other articles of vulcanized rubber (other than hard rubber), specifically other O-Rings. The basic duty is 2.5%, with an additional 25.0% duty, increasing to 30.0% after April 2, 2025, resulting in a total tariff of 57.5%.
- 3926904510: This code covers other articles of plastics and articles of other materials of headings 3901 to 3914, specifically gaskets, washers and other seals, including O-Rings. The basic duty is 3.5%, with an additional 25.0% duty, increasing to 30.0% after April 2, 2025, resulting in a total tariff of 58.5%.
- 4008210000: This code covers plates, sheets, strip, rods and profile shapes, of vulcanized rubber other than hard rubber, specifically of noncellular rubber: plates, sheets and strip. The basic duty is 0.0%, with an additional 25.0% duty, increasing to 30.0% after April 2, 2025, resulting in a total tariff of 55.0%.
- 4008294000: This code covers plates, sheets, strip, rods and profile shapes, of vulcanized rubber other than hard rubber, specifically of noncellular rubber: other. The basic duty is 2.9%, with an additional 25.0% duty, increasing to 30.0% after April 2, 2025, resulting in a total tariff of 57.9%.