HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
---|---|---|---|---|---|
7307911000 | Doc | 83.3% | CN | US | 2025-05-12 |
7307923010 | Doc | 80.0% | CN | US | 2025-05-12 |
7326908630 | Doc | 82.9% | CN | US | 2025-05-12 |
7326908605 | Doc | 82.9% | CN | US | 2025-05-12 |
8108906060 | Doc | 70.0% | CN | US | 2025-05-12 |
8108903060 | Doc | 60.5% | CN | US | 2025-05-12 |
7411101030 | Doc | 56.5% | CN | US | 2025-05-12 |
7411105000 | Doc | 58.0% | CN | US | 2025-05-12 |
7412100000 | Doc | 58.0% | CN | US | 2025-05-12 |
8307103000 | Doc | 58.8% | CN | US | 2025-05-12 |
8307106000 | Doc | 58.8% | CN | US | 2025-05-12 |
8306100000 | Doc | 35.8% | CN | US | 2025-05-12 |
8306100000 | Doc | 35.8% | CN | US | 2025-05-12 |
Water Pipe Clamp
A water pipe clamp is a mechanical fastener used to secure a pipe to a fixed surface, typically a wall, floor, or joist. They are essential components in plumbing and piping systems, providing support and reducing vibration and noise.
Material
Water pipe clamps are manufactured from a variety of materials, selected based on the pipe material, environment, and load requirements. Common materials include:
- Steel: Galvanized steel is frequently used for its strength, durability, and corrosion resistance. Stainless steel offers superior corrosion resistance, suitable for harsh environments. Carbon steel is also used, often with protective coatings.
- Plastic: PVC, CPVC, and polypropylene are used for lighter duty applications and are suitable for non-metallic piping. They are corrosion resistant and cost-effective.
- Aluminum: Lightweight and corrosion-resistant, aluminum clamps are used in specific applications where weight is a concern.
- Copper: Used primarily for supporting copper pipes, offering compatibility and corrosion resistance.
Purpose
The primary purposes of water pipe clamps are:
- Support: To bear the weight of the pipe and the fluid it carries, preventing sagging or bending.
- Stabilization: To reduce pipe movement due to water hammer, thermal expansion/contraction, or external forces (vibration).
- Noise Reduction: Minimizing pipe rattling and vibration noise, particularly in residential and commercial buildings.
- Isolation: In some cases, clamps are used with rubber linings or isolation materials to dampen vibration and reduce noise transmission to the supporting structure.
Function
A typical water pipe clamp consists of a band that encircles the pipe and a mounting plate or base that attaches to the supporting structure. The band is tightened using bolts, screws, or other fasteners, creating a secure grip on the pipe. The clamping force must be sufficient to hold the pipe firmly in place without damaging it. Some clamps incorporate cushioning materials (rubber, plastic) to protect the pipe surface and enhance vibration damping.
Usage Scenarios
Water pipe clamps are used in a wide range of applications:
- Residential Plumbing: Supporting hot and cold water pipes, drain pipes, and waste lines.
- Commercial Buildings: Securing piping systems in offices, hotels, hospitals, and other commercial structures.
- Industrial Facilities: Supporting process piping, HVAC systems, and fire sprinkler systems.
- HVAC Systems: Supporting chilled water pipes, heating pipes, and refrigerant lines.
- Fire Protection Systems: Securing fire sprinkler pipes to ceilings and walls.
- Marine Applications: Supporting piping systems on ships and offshore platforms (often stainless steel).
Common Types
Several types of water pipe clamps are available, each designed for specific applications:
- Band Clamps: The most common type, consisting of a metal band and a mounting plate. Available in various sizes and materials.
- Spring Clamps: Use spring tension to grip the pipe. Suitable for lighter duty applications and quick installation.
- U-Bolts: Consist of a U-shaped bolt and a saddle. Commonly used for larger diameter pipes and irregular shapes.
- Split Clamps: Designed for installation on pipes that are already in place.
- Roller Clamps: Incorporate rollers to allow for thermal expansion and contraction of the pipe.
- Firestop Clamps: Specifically designed for use in fire-rated walls and ceilings, incorporating fire-resistant materials.
- Concealed Clamps: Designed for aesthetic applications where the clamp is hidden from view.
- Cushioned Clamps: Feature rubber or plastic linings to protect the pipe surface and reduce noise.
Water pipe clamps can be categorized based on material (iron, steel, copper, ceramic) and function (supporting tubes and pipes, grounding component). The following HS codes may be applicable:
-
7307911000: Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel: Other: Flanges: Not machined, not tooled and not otherwise processed after forging: Of iron or nonalloy steel. This code applies to iron or steel flanges that haven’t been further processed after forging.
- 73: Articles of iron or steel.
- 07: Tube or pipe fittings.
- 91: Other.
- 10: Flanges.
- 00: Of iron or nonalloy steel.
-
7326908630: Other articles of iron or steel: Other: Other: Other Hangers and similar supports for tubes and pipes. This code is specifically for iron or steel hangers and supports designed for tubes and pipes.
- 73: Articles of iron or steel.
- 26: Other articles of iron or steel.
- 90: Other.
- 86: Other.
- 30: Hangers and similar supports for tubes and pipes.
-
7326908605: Other articles of iron or steel: Other: Other: Other Rods for electrical grounding (potentially applicable if the clamp functions as a grounding component). This code applies to iron or steel rods used for electrical grounding, and may be relevant if the clamp also serves this purpose.
- 73: Articles of iron or steel.
- 26: Other articles of iron or steel.
- 90: Other.
- 86: Other.
- 05: Rods for electrical grounding.
-
8487900080: Machinery parts, not containing electrical connectors, insulators, coils, contacts or other electrical features, and not specified or included elsewhere in this chapter: Other Other. This code could apply if the clamp is considered a machinery part without electrical components.
- 84: Machinery and mechanical appliances.
- 87: Parts of machinery.
- 90: Other.
- 00: Other.
- 80: Other.
Regarding HS code 7326908605, please note that this code is only applicable if the clamp functions as a grounding component. If the clamp does not serve this purpose, it is not the correct HS code.