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Flanged Pipe
Flanged pipe is a type of pipe that has a flange at one or both ends. The flange end is connected to another flange from another pipe, valve, or other equipment by bolts. Then achieve the connection between pipes , pipe fittings ,valves etc pipe parts. The connection between flanges is rigid ,no movement or angle deflection is allowable. But the flange allows for easy assembly and disassembly of the pipe sections, providing a strong and leak-proof connection. Flanged pipes are commonly used in plumbing, industrial applications, and various types of fluid and gas transportation systems. They are particularly useful in situations where pipes need to be frequently connected and disconnected or where maintenance is required.
Flanged pipe mainly include steel flanges pipes and ductile iron flanged pipe. Judberd is competitive manufacturer for ductile iron flanged pipe , so we take ductile iron flanged pipes as examples.
Flanged pipes Types
According to the flanges quantity
Flanged pipe include double flanged pipe, flange spigot pipe ,flanged pipe with puddle ，If you need double flanged pipe, you need to specify the flanged pipe length (the total length from one flange face to the other flange face, the flange design standard and working pressure PN value), If you need flange spigot pipe, you need to specify the flanged pipe length (the total length from one flange face to the other spigot end), the flange design standard and PN value, If you need flanged pipe with puddle, you need to determine if it is one flange pipe with puddle or double flanged pipe with puddle, the total length of the flanged pipe, the puddle flange position(like 1 meter from flange end), the working pressure PN value. The working pressure PN value not only indicates the working pressure of the pipe, it also indicates the PN value the flange dimensions should follow.
Double flanged pipe
Flange spigot pipe
Double flanged pipe with puddle
According to Production Method
The production method of flanged pipe includes integral casting (applicable to flanged pipes with an overall length less than or equal to 1.5m), welding (applicable to flanged pipes with an overall length greater than 1.5m) and thread connection. Among them, the wall thickness of the flanged pipe of integral casting is grade K12, and the wall thickness of the welding flanged pipe is grade K9. The welding flanged pipe is cut to the appropriate length with a 6m long socket spigot pipe, and then welded at both ends, and the cast metal flange is welded by welding rod. Please note that the ductile iron flanged pipe is different from the steel flanged pipe. The ductile iron flanged pipe is usually used for water transportation pipeline, and the surface needs to be coated with an anti-corrosion coating. The welding will destroy the anti-corrosion coating on the surface. Therefore, the ductile iron flanged pipe is usually welded by the manufacturer first, and then the surface is coated with an anti-corrosion coating. The steel flanged pipe can be welded by the user when installing the pipe. The thread-connected flanged pipe is not usually used because the production process is complex and the installation is time consuming (unless the customer has special requirements).
Flanged pipes Connection
Flanged pipes connection is a type of rigid joint used in piping systems to connect pipes, valves, pumps, and other equipment. It consists of flanges, bolts, nuts, and a gasket to ensure a tight seal. The flanges are typically integrally casted, welded or screwed onto the pipe ends. The gasket is placed between the two flanges, and the bolts are tightened to secure the connection, ensuring a leak-proof seal.Flanged connections are commonly used in industrial, commercial, and residential piping systems due to their ability to be easily assembled and disassembled for maintenance or repair.
In water pipeline system, there have 2 types pipe connection .One is socket and spigot connection, another is flanged pipe connection. Compare to socket and spigot connection ,
Flanged Joint offer strength, durability, and ease of maintenance, making them suitable for high-pressure and high-temperature applications. They are ideal for systems that require frequent disassembly and inspection but come with higher costs and space requirements, it is suitable for above-ground pipeline.
Push on Joint provide flexibility, ease of installation, and cost-effectiveness, making them suitable for low to moderate pressure systems where some degree of movement or flexibility is beneficial, it is suitable for underground pipeline.
Selecting the appropriate connection method depends on the specific requirements of the piping system, including pressure, temperature, flexibility, maintenance needs, above-ground pipeline or underground pipeline.
Mechanical Joint Connections
Typically consists of a gland (follower ring), a gasket, and bolts. The pipe is inserted into a bell or coupling, and the gland is used to compress the gasket to create a seal.Often used with ductile iron pipes and fittings, but can also be used with other materials like PVC. It is quicker and easier to install compared to flanged connections, often requiring fewer tools and less skill.It Can accommodate some degree of misalignment, thermal expansion, and ground movement, reducing the risk of leaks.Generally lower initial cost compared to flanged connections, especially for smaller diameters and lower pressure applications.The gasket provides a good seal, effectively preventing leaks.Typically suitable for low to moderate pressure systems; not ideal for high-pressure applications.Less robust compared to flanged connections in high-pressure and high-temperature environments.May require periodic tightening to maintain the seal over time.
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