| HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
|---|---|---|---|---|---|
| 7307995015 | Doc | 84.3% | CN | US | 2025-05-12 |
| 7307995045 | Doc | 84.3% | CN | US | 2025-05-12 |
| 7326908688 | Doc | 82.9% | CN | US | 2025-05-12 |
Pagoda Valve
A pagoda valve, also known as a cone valve or taper valve, is a type of valve used to control the flow of fluids, primarily in well testing, production, and stimulation operations within the oil and gas industry. Its design incorporates a conical plug that seals against a matching conical seat.
Material
Pagoda valves are typically manufactured from high-strength alloy steels, often incorporating materials resistant to corrosion and erosion. Common materials include:
- 4140 Alloy Steel: Provides high strength and toughness.
- High-Chrome Alloys: Offer enhanced resistance to abrasion and corrosion.
- Inconel/Hastelloy: Used in highly corrosive environments due to superior chemical resistance.
- Stainless Steel (various grades): Employed for moderate corrosion resistance.
Purpose
The primary purpose of a pagoda valve is to provide reliable, positive shut-off and controlled flow of fluids in high-pressure well control systems. They are particularly suited for applications requiring frequent operation and the ability to handle abrasive fluids or solids.
Function
The valve functions by utilizing a tapered plug that is forced into a matching tapered seat, creating a mechanical seal. The plug is typically actuated using hydraulic power, although manual operation is also possible for smaller valves. The conical shape allows for a self-centering action, enhancing the sealing capability. The valve is designed to withstand high differential pressures and provide a bubble-tight shut-off.
Usage Scenarios
- Well Testing: Used to control flow during pressure transient tests and sample collection.
- Production Operations: Employed for controlling flow rates from producing wells.
- Stimulation (Fracking): Used to control fluid injection and flowback during hydraulic fracturing operations.
- Coiled Tubing Operations: Integrated into coiled tubing units for controlling fluid flow during intervention procedures.
- Flowback Operations: Used to manage the controlled release of fluids following well completion or workover.
- Nitrogen Lifting: Used in conjunction with nitrogen injection to control the flow of fluids from the well.
Common Types
- Single Cone Valve: The most basic type, featuring a single conical plug and seat.
- Double Cone Valve: Incorporates two conical plugs and seats for enhanced sealing reliability and redundancy.
- Hydraulic Control Valve: Actuated using hydraulic power for remote operation and precise control.
- Manual Control Valve: Operated manually using a handwheel or lever.
- Full-Opening Valve: Designed with a full-bore opening to minimize pressure drop.
- Restrictive Valve: Incorporates a fixed restriction to control flow rates.
- Surface Safety Valve (SSV): A critical safety component used to automatically shut in the well in emergency situations. Often incorporates a pagoda valve design.
Based on the provided information, the following HS codes may be relevant to “pagoda valve”:
- 7307.99.50.15: This HS code falls under Chapter 73, which covers articles of iron or steel. Specifically, it relates to tube or pipe fittings (for example, couplings, elbows, sleeves). The detailed classification is 'Other' under 'Other' under 'Other Of iron or nonalloy steel', and further specifies 'Nipples'. It has a basic tariff of 4.3%, an additional tariff of 25.0%, and a tariff of 30% after April 2, 2025, for steel and aluminum products. The total tariff rate is 84.3%.
- 7307.99.50.45: Also within Chapter 73 (articles of iron or steel), this HS code covers tube or pipe fittings (for example, couplings, elbows, sleeves). The detailed classification is 'Other' under 'Other' under 'Other Of iron or nonalloy steel', but specifies 'Other'. It has a basic tariff of 4.3%, an additional tariff of 25.0%, and a tariff of 30% after April 2, 2025, for steel and aluminum products. The total tariff rate is 84.3%.
- 7326.90.86.88: This HS code is categorized under Chapter 73, covering 'Other articles of iron or steel'. The detailed classification is 'Other' under 'Other' under 'Other' under 'Other Other'. It has a basic tariff of 2.9%, an additional tariff of 25.0%, and a tariff of 30% after April 2, 2025, for steel and aluminum products. The total tariff rate is 82.9%.
It is important to note that the final HS code classification depends on the specific material, construction, and intended use of the pagoda valve.
Regarding these HS codes, please note the need to verify the material composition (steel or non-alloy steel) and be aware of the additional tariffs applicable to steel and aluminum products, particularly the change to 30% after April 2, 2025.