Which of the four pipe connection methods have the best connection sealing?


There are four main methods: bai thread connection, flange connection, socket connection and welding du. The strength and tightness of the welding zhi connection is the best.
The threaded connection dao is mainly suitable for small diameter pipes. When connecting, it is generally necessary to wrap a fluorine plastic sealing tape on the threaded connection part, or coat it with thick paint, wind hemp wire and other sealing materialsFiberglass Sealing Rope Manufacturers to prevent leakage. When the pressure is above 1.6 MPa, the end of the pipe is generally sealed with a gasket. This connection method is simple and can be disassembled and reassembled, but the union must be installed in the appropriate place of the pipeline to facilitate disassembly and assembly.
The applicable pipe diameter range of flange connection is larger. When connecting, choose different flanges and gaskets according to the nature, pressure and temperature of the fluid, and use bolts to clamp the gasket to maintain the seal. Most of the pipe sections that need to be disassembled and where the pipes and equipment are connected are flanges. Join.





The socket connection is mainly used for the connection between cast iron pipes, concrete pipes, clay pipes and their couplings. It is only suitable for water supply, drainage and gas pipes working under low pressure and normal temperature conditions. When connecting, generally fill the socket slot with hemp silk, cotton thread or asbestos rope first, and then fill it with asbestos cement or lead and other materials. You can also fill the socket with a rubber sealing ring to make it better The flexibility allows a small amount of movement of the pipe.
The welded connection has the best strength and tightness, and is suitable for all kinds of pipelines, saving labor and materials, but the pipe and the pipe connection must be cut off when disassembling. Most of the main pipelines for water supply, drainage, heating, and gas supply in cities and long-distance oil and gas pipelines are laid underground, while the process pipelines in factories are mostly laid on the ground for easy operation and maintenance. Pipeline passage, support, slope and drainage, compensation, heat preservation and heating, anti-corrosion and cleaning, identification and painting and safety, etc., are important issues for both above-ground and underground laying.