HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
---|---|---|---|---|---|
8425490000 | Doc | 55.0% | CN | US | 2025-05-12 |
8425190000 | Doc | 55.0% | CN | US | 2025-05-12 |
8479899599 | Doc | 57.5% | CN | US | 2025-05-12 |
8479909596 | Doc | 80.0% | CN | US | 2025-05-12 |
7308400000 | Doc | 80.0% | CN | US | 2025-05-12 |
7326908688 | Doc | 82.9% | CN | US | 2025-05-12 |
Vertical Plate Clamp
A vertical plate clamp is a lifting and handling tool used to securely hold and lift steel plates in a vertical orientation. These clamps are essential in various industries, including construction, metal fabrication, shipbuilding, and manufacturing, where the frequent lifting and manipulation of steel plates are required.
Material:
- High-Strength Alloy Steel: The primary material for most plate clamps is forged or cast high-strength alloy steel, chosen for its ability to withstand substantial loads and resist deformation under stress. Common alloys include those conforming to standards like ASTM A514 or equivalent.
- Drop-Forged Steel: Many critical components, like the clamp jaws and lifting lugs, are often drop-forged for enhanced durability and resistance to fatigue.
- Surface Treatment: Clamps typically undergo surface treatments like powder coating, galvanizing, or painting to protect against corrosion and wear.
Purpose:
The primary purpose of a vertical plate clamp is to provide a safe and efficient method for lifting, transporting, and positioning steel plates without damaging the material. They eliminate the need for welding or drilling holes in the plates for lifting points, preserving the plate's integrity and reducing preparation time.
Function:
Vertical plate clamps function by gripping the edges of the steel plate using a mechanical clamping mechanism. The clamping force is generated through a lever system, hydraulic pressure, or a screw mechanism. Key functional aspects include:
- Self-Locking Mechanism: Most clamps feature a self-locking mechanism that automatically engages when lifted, preventing accidental slippage.
- Adjustable Jaw Capacity: Clamps are designed with adjustable jaw capacities to accommodate plates of varying thicknesses.
- Load Distribution: The clamp distributes the lifting load across a wider surface area of the plate, minimizing stress concentration.
- Swivel Capability: Many models incorporate a swivel feature to allow for precise positioning of the plate during lifting and handling.
Usage Scenarios:
- Construction: Lifting and positioning steel plates for structural fabrication, bridge building, and high-rise construction.
- Metal Fabrication: Handling plates during cutting, welding, assembly, and machining processes.
- Shipbuilding: Lifting and moving large steel plates for hull construction and repair.
- Manufacturing: Handling plates in the production of heavy equipment, pressure vessels, and other steel structures.
- Wind Energy: Lifting tower sections and other large steel components.
Common Types:
- Manual Vertical Plate Clamps: These clamps utilize a lever system to apply clamping force. They are suitable for lighter loads and applications where hydraulic power is unavailable.
- Hydraulic Vertical Plate Clamps: These clamps employ hydraulic cylinders to generate a higher clamping force, enabling the lifting of heavier plates. They often include remote control operation for increased safety and efficiency.
- Screw-Type Vertical Plate Clamps: These clamps use a screw mechanism to tighten the grip on the plate. They offer precise control over clamping force but are typically used for lighter to medium loads.
- Double-Leg Vertical Plate Clamps: Utilize two clamping legs for increased stability and load capacity, commonly used for lifting wider or heavier plates.
- Single-Leg Vertical Plate Clamps: Used for lifting single plates or for applications where space is limited.
- Magnetic Vertical Plate Clamps: Combine magnetic adhesion with mechanical clamping for specialized applications, providing a secure grip on ferromagnetic steel plates.
Vertical Plate Clamp Classification
Based on the provided information, the classification of a vertical plate clamp requires careful consideration of its material and intended use. The following HS codes may be relevant:
-
7308400000: Structures (excluding prefabricated buildings of heading 9406) and parts of structures (for example, bridges and bridge sections, lock gates, towers, lattice masts, roofs, roofing frameworks, doors and windows and their frames and thresholds for doors, shutters, balustrades, pillars and columns) of iron or steel; plates, rods, angles, shapes, sections, tubes and the like, prepared for use in structures, of iron or steel: Equipment for scaffolding, shuttering, propping or pit- propping.
- 73: Structures and parts of structures (of iron or steel). This chapter covers articles used in construction and engineering.
- 08: Structures and parts thereof of iron or steel.
- 40: Equipment for scaffolding, shuttering, propping or pit- propping. This subheading specifically includes equipment used in temporary support structures, which could encompass plate clamps used in construction.
-
7326908688: Other articles of iron or steel: Other: Other: Other: Other Other.
- 73: Structures and parts of structures (of iron or steel). This chapter covers articles used in construction and engineering.
- 26: Other articles of iron or steel. This heading covers a broad range of iron or steel articles not specifically classified elsewhere.
- 90: Other. This subheading is a residual category for articles not further specified within the chapter.
- 86: Other. This subheading is a further residual category.
- 88: Other. This subheading is a further residual category.
-
8479899599: Machines and mechanical appliances having individual functions, not specified or included elsewhere in this chapter; parts thereof: Other machines and mechanical appliances: Other: Other Other.
- 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof. This chapter covers a wide range of machinery.
- 79: Machines and mechanical appliances having individual functions, not specified or included elsewhere in this chapter.
- 89: Other machines and mechanical appliances.
- 95: Other. This subheading is a residual category.
- 99: Other. This subheading is a further residual category.
Important Considerations:
Regarding HS codes 7308400000, 7326908688, please note the 25%加征关税 and the potential for a 30%加征关税 after 2025.4.2, as well as the 25%加征关税 on steel and aluminum products. Regarding HS code 8479899599, please note the 2.5%基础关税, 0.0%加征关税, and the potential for a 30%加征关税 after 2025.4.2, as well as the 25%加征关税 on steel and aluminum products.