According to the purpose and the pipe material, the commonly used connection methods of the construction pipeline are: threaded connection, flange connection, welding, groove connection (clamp connection), card sleeve connection, compression connection, hot melt connection, etc.
1. Threaded connection
Steel-plastic composite pipes are generally connected by threads. Galvanized steel pipes are connected by threads, and the surface of the galvanized layer and the exposed threads that are damaged during threading should be treated with anti-corrosion treatment.
2. Flange connection
Pipes with larger diameters are connected by flanges. Flange connections are generally used in the main road connecting valves, check valves, water meters, pumps, etc., as well as pipe sections that require frequent disassembly and maintenance.
Welding is suitable for non-galvanized steel pipes. It is mostly used for concealed pipes and pipes with larger diameters, and is often used in high-rise buildings. Copper pipe connection can adopt special joint or welding. When the pipe diameter is less than 22mm, socket or sleeve welding should be used.
Grooved connectors can be used for firefighting water, air-conditioning cold and hot water, water supply, rainwater and other systems with a diameter greater than or equal to 100mm galvanized steel pipes. It has simple operation and does not affect the original characteristics of the pipeline, construction safety, and system stability. , Convenient maintenance, labor and time saving and other features.
The stainless steel compression pipe connection technology replaces the traditional water supply pipe connection technology such as thread, welding, and glue connection. It has the characteristics of protecting water quality and sanitation, strong corrosion resistance, and long service life. Socket pipe fittings with special sealing rings will be installed during construction. It is connected with the pipeline, and the nozzle is compressed with a special tool to play a role of sealing and fastening. The construction has the advantages of convenient installation, reliable connection, and economical reasonableness.
Hot-melt connection mainly includes: hot-melt socket connection and hot-melt butt welding connection. Hot-melt connection has the advantages of simple connection, long service life, and not easy to corrode.