What are the connection methods for carbon corrugated pipes?

The connection methods for carbon corrugated pipes are diverse, and an appropriate approach can be selected based on construction requirements and material characteristics. Here are the common connection methods and their operational key points:

Hot Melt Connection
Applicable Scenarios: Connections requiring high strength and good sealing performance, commonly used in the main trunk or critical parts of pipeline systems.
Operational Steps:

Material Preparation: Place the pipeline or pipe fittings on the butt welding machine, reserving a cutting allowance of 10-20mm.

Clamping and Fixing: Select appropriate collet fixtures to clamp the pipe for cutting preparation.

End Face Cutting: Remove impurities and oxide layers from the end face to ensure it is flat, smooth, and free of impurities.

Heating and Melting: Use a heating plate to control the butt welding temperature between 210-230℃, allowing both end faces to melt to a length of 1-2mm.

Melting and Butt Welding: Complete the butt welding under melting pressure, with a preferred bead width of 2-4mm.

Cooling and Solidification: Maintain the butt welding pressure constant until the joint slowly cools down and feels hard and cold to the touch when the bead is touched, then release the collet.
Advantages: High connection strength and good sealing performance, suitable for long-term pressurized pipeline systems.
Precautions: Requires professional equipment for operation, with strict requirements for temperature and time control.

Electrofusion Connection
Applicable Scenarios: Construction scenarios in complex environments or with limited space, such as underground pipelines and narrow spaces.
Operational Steps:

Inserting Pipe Fittings: Insert the ends of two corrugated pipes into the electrofusion fitting, ensuring the ends are in contact and positioned between the arc-shaped plates.

Clamping Pipe Fittings: Use a drive assembly to move the electrode rod, causing the arc-shaped plates to clamp the connection area of the corrugated pipes.

Electrifying and Melting: Apply power to the electrode rod, causing the arc-shaped plates to heat up and melt the connection area of the corrugated pipes.

Power Off and Solidification: After melting is complete, cut off the power and allow the connection area to cool and solidify.
Advantages: Simple operation and strong adaptability. The structural strength of electrofusion fittings is higher than that of heat-shrinkable tubes, providing higher connection stability.
Precautions: Requires the use of dedicated electrofusion fittings, with relatively higher costs.

Socket Connection
Applicable Scenarios: Quick installation or temporary connections, such as temporary drainage and cable protection.
Operational Steps:

Cleaning the End: Clean the outer wall of the pipe end, removing impurities and burrs.

Socketing in Place: Insert the socket end of a straight coupling into the pipe, place a thick wooden board on the end face, and tap it with a hammer to socket the pipe in place.

Sequential Connection: Insert another pipe into the socket end of the straight coupling on the other side and repeat the operation until the connection is complete.
Advantages: Simple operation without the need for special tools, suitable for quick construction.
Precautions: The connection strength is relatively low, requiring regular inspection of sealing performance.

Rotary Winding Connection
Applicable Scenarios: Low-pressure or temporary pipeline connections, such as farmland irrigation and temporary drainage.
Operational Steps:

Rotating the Joint: Rotate the joint onto one end of the pipe to be connected, then reverse rotate it onto the other end.

Winding for Sealing: Use PVC sealing tape or dedicated winding tape to tightly wind the connection area to ensure sealing.
Advantages: Low cost and flexible operation, suitable for temporary or low-pressure scenarios.
Precautions: Requires regular inspection for aging or loosening of the winding tape.

Mechanical Connection (Clamp/Flange Connection)
Applicable Scenarios: Pipeline systems requiring frequent disassembly or maintenance, such as industrial pipelines and fire protection pipelines.
Operational Steps:

Aligning Pipe Ends: Align the ends of two corrugated pipes to ensure no misalignment.

Installing Clamps/Flanges: Install dedicated clamps or flanges at the pipe ends and tighten them with bolts.

Checking Sealing: Ensure there are no leaks at the connection area, and add a sealing gasket if necessary.
Advantages: Strong connection and detachable, facilitating later maintenance.
Precautions: Requires the selection of clamps or flanges that match the pipe diameter to avoid leaks.