Pig Trap Pipeline

Description

Introduction of Pig Trap Pipeline

Pig Trap Pipeline is mechanical devices used on circular openings of pressure pipelines or pressure vessels. They allow for rapid opening and closing, facilitating efficient maintenance and inspection tasks. These devices typically consist of a body flange, a head cover, a locking ring or clamp, a sealing ring, a safety interlock mechanism, an opening and closing mechanism, a rotating arm, and a short section (if needed).

Components and Design

Key Components

1. Body Flange and Head Cover: These form the main structure of the blind flange.
2. Locking Ring or Clamp: Secures the head cover in place.
3. Sealing Ring: Ensures a tight seal to prevent leaks.
4. Safety Interlock Mechanism: Prevents accidental opening under pressure.
5. Opening and Closing Mechanism: Facilitates the quick and easy operation of the flange.
6. Rotating Arm and Short Section (if needed): Assists in the opening and closing process.

Design Principle

The design aims to simplify the process of opening and closing the end cover, reducing the time and labor required. Unlike traditional bolted flanges, which require sequential tightening and loosening of bolts, quick-opening blind flanges need only a small movement or rotation of the locking components to operate. This allows a single worker to complete the task quickly.

Applications

Pig Trap Pipeline is typically installed at pipeline openings to facilitate the cleaning, unclogging, inspection, and maintenance of pipelines and containers. Their rapid operation makes them ideal for tasks that require frequent access.

Safety Considerations

1. Check Instrument Readings: Ensure all indicators on the container are normal.
2. Inspect Connections: Verify there are no leaks at any connection points.
3. Prepare Tools and Safety Equipment: Have tools, fire extinguishers, fire blankets, and other necessary facilities ready.
4. Supervised Operation: One person should operate the blind flange while others monitor the process.
5. Avoid Standing in Front: No one should stand in front of the blind flange during operation.

Operating Steps

1. Check Internal Pressure: Ensure the pressure gauge reads zero before operation.
2. Verify Valve Positions: Ensure all inlet and outlet valves are closed.
3. Release Pressure Slowly: Slowly loosen the pressure alarm bolt to check for any remaining pressure.
4. Remove Alarm Bolt and Lock Plate: If no pressure is detected, remove these components.
5. Rotate Handle: Turn the handle counterclockwise 60-120 degrees to engage the drive chain and mechanical device, opening the blind flange.

Specifications of Pig Trap Pipeline

1. Design Pressure: DN1.6-9.99MPa.
2. Design Temperature: 40℃.
3. Test Pressure: 1.5 times the design pressure.
4. Nominal Diameter: DN100-DN1400.
5. Corrosion Allowance: 2mm.
6. Seismic Design Intensity: 7 degrees.
7. Applicable Medium: Gas.
8. Service Life: 30 years.

Advantages and Features of Pig Trap Pipeline

Pig Trap Pipeline

Pig Trap Pipeline is designed to simplify the process of opening and closing the end cover. With a special structural design, you can easily complete the opening and closing by moving the locking component a short distance or rotating it a certain angle. Compared to traditional bolted flange connections, this greatly reduces operation time and labor intensity. Even a single worker can complete the operation in a short time, enhancing production efficiency.

Safety and Reliability

The Pig Trap Pipeline is equipped with a safety interlock mechanism that ensures the end cover cannot be opened until the pressure is fully released, preventing accidental incidents. The device also has anti-vibration and anti-loosening features, ensuring stability and safety in harsh working environments. Additionally, the explosion-proof design of the quick-opening blind flange makes it suitable for environments with explosive gases and flammable media, ensuring operational safety.

Efficient Sealing

Pig Trap Pipeline uses high-quality sealing rings to ensure effective sealing under high-pressure conditions, preventing leaks. The sealing ring materials are carefully selected for their excellent corrosion resistance and high-temperature performance, making them suitable for various media and conditions.

High Durability

The core components of the quick-opening blind flange are made from high-quality materials, providing excellent wear and corrosion resistance. The product is designed with a lifespan of up to 30 years, enabling stable operation in harsh environments over the long term and reducing maintenance frequency and replacement costs.

Various Specifications

Our quick-opening blind flanges are available in various specifications, suitable for pipeline systems with a nominal diameter of DN100 to DN1400. Whether for small or large diameter pipelines, you can find the appropriate model. Additionally, the product’s design pressure range is wide (DN1.6-9.99MPa), meeting the needs of different pressure levels.

Wide Applicability

Quick-opening blind flanges are widely used in the transportation pipelines of oil, gas, and water, particularly in systems requiring frequent cleaning, unclogging, and inspection. Whether in petrochemical, natural gas transportation, or water treatment systems, quick-opening blind flanges play a crucial role.