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8 Common Connection Methods For Construction Pipelines

8 Common Connection Methods For Construction Pipelines

Today, IFAN introduces 8 commonly used connection methods for construction pipelines, and you can understand them at once! This is our Instagram Website: www.instagram.com,Welcome to follow us to learn more and contact us to get free samples.

According to the purpose and pipe material, the commonly used connection methods of construction pipelines are threaded connection, flange connection, welding, groove connection (clamp connection), ferrule connection, compression connection, hot melt connection, socket connection, etc.

Threaded connection

The threaded connection is connected by threaded pipe fittings. The galvanized steel pipe with a pipe diameter less than or equal to 100mm is suitable for threaded connection, and it is mostly used for surface-mounted pipes. Steel-plastic composite pipes are generally also threaded. The galvanized steel pipe shall be connected by threads, and the surface of the galvanized layer and the exposed thread parts damaged during the threading shall be treated with anticorrosion; flanges or ferrule-type special pipe fittings shall be used for connection, and the welding place between the galvanized steel pipe and the flange shall be two Secondary galvanizing.

Flange connection

Pipes with larger diameters are connected by flanges. Flange connections are generally used in main roads to connect valves, check valves, water meters, water pumps, etc., as well as on pipe sections that require frequent disassembly and maintenance. If the galvanized pipe is connected by welding or flange, the welding place should be galvanized twice or anti-corrosion.


Welding is suitable for non-galvanized steel pipes, mostly used for concealed pipes and pipes with larger diameters, and is widely used in high-rise buildings. Copper pipe connections can use special joints or welding. When the pipe diameter is less than 22mm, it should be welded by a socket or sleeve. Stainless steel pipes can be socket welded.

Groove connection (clamp connection)

The grooved connector can be used to connect galvanized steel pipes with a diameter greater than or equal to 100mm in fire water, air-conditioning hot and cold water, water supply, and rainwater systems. It has simple operation, does not affect the original characteristics of the pipeline, has safe construction, and has good system stability. , Easy maintenance, saving labor and time.

Ferrule connection

Aluminum-plastic composite pipes are generally crimped with threaded ferrules. Put the fitting nut on the end of the pipe, then insert the inner core of the fitting into the end, and tighten the fitting and the nut with a wrench. The connection of copper pipes can also be crimped with threaded ferrules.

Press connection

The connection technology of stainless steel clamping pipe fittings replaces the traditional water supply pipeline connection technologies such as screw thread, welding, and glue connection. It has the characteristics of protecting water quality and sanitation, strong corrosion resistance, and long service life. It is connected to the pipeline, and the nozzle of the pipe is pressed with a special tool to seal and fasten it. It has the advantages of convenient installation, reliable connection, and economical and reasonable during construction.

Hot melt connection

The connection method of the PPR pipe uses a hot melter for a hot melt connection.

Socket connection

For the connection of water supply and drainage cast iron pipes and fittings. There are two types of flexible connections and rigid connections. Flexible connections are sealed with rubber rings, rigid connections are sealed with asbestos cement or expansive packing, and lead seals can be used for important occasions.


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