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There are 8 common connection methods for plastic pipes and metal pipes

Release time: 2023/2/13 11:31:55

According to different application scopes and scenarios, common connection methods of plastic pipeline and metal pipeline include: screw connection, flange connection, welding, groove excavation connection (reducing tee connection), sleeve connection, clamp connection, hot melt connection, socket connection, etc.
1. Screw connection
Screw connection is the use of threaded pipe parts connection, pipe through not more than 100mm galvanized steel pipe is the best screw connection, generally used for open pipe. Plastic coated composite steel pipes are usually connected with screws. Galvanized steel pipe should be connected with screw, the damaged coating surface and exposed screw part should be rust prevention; Flange or sleeve special pipe fittings should be used for connection, and the welding of galvanized steel pipe and flange should be galvanized twice by hot dipping.
2. Flange connection
The larger diameter pipe adopts flange connection, flange connection is generally used in the main road connection stop valve, check valve, remote water meter, centrifugal water pump and other positions, as well as the need for frequent disassembly, maintenance pipeline. If galvanized pipes are connected by welding or flange, the welding place should be galvanized or corrosion-resistant by secondary hot dipping.
3. Welding
Non-galvanized steel pipe can be used for welding, which is generally used for dark coating pipes and large diameter pipes, and is more used in high-rise buildings. When the outer diameter is less than 22mm, socket or rigid waterproof sleeve shall be used for welding. Socket and socket connection shall be assembled to meet the flow direction of the medium. When the pipe length is higher than or equal to 2mm, professional matching rate welding shall be used. Stainless steel pipe can be welded by socket.
4. Trench excavation connection (reducing tee connection)
The trench excavation type connector is suitable for the galvanized steel pipe whose diameter is higher than or equal to 100mm for fire water, air conditioning hot and cold water, water supply and drainage, rainfall and other services. It has the features of convenient use, little influence on the pipeline's own characteristics, site construction safety, good system stability, convenient maintenance, saving time, labor and cost.
5, sleeve type connection
PPR pipe is generally connected with screw pneumatic quick connector. The parts screw cap is sucked on the top of the pipe, and the parts replacement core is set into the top, and the parts and screw cap can be tightened with the plate hand. The connection of copper pipe can also be connected by screw pneumatic quick joint.
6. Clamp and pressure connection
Stainless steel clamping pipe fittings connection professional replace screw, welding, riveting and other water supply and drainage pipe connection professional, with the maintenance of clean water health, corrosion resistance, durability and other characteristics, in the construction process will be with a unique sealing ring socket connection pipe and pipe connection, with special tools to fasten the vertical pipe and give full play to the sealing and fastening role, In the construction process, it has the advantages of saving time and effort in assembly, reliable connection and reasonable assets.
7. Hot melt connection
PPR pipe connection method adopts hot melt device for hot melt connection.
8. Socket connection
Used for water supply and drainage and drainage cast iron pipe and pipe connection. There are two types of flexible connection and bending stiffness connection. Flexible connection uses rubber ring sealing, bending stiffness connection uses asbestos cement or plastic rotary seal, and important occasions can use lead sealing.
 
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