Which type of joint is typically used for ductile iron piping?

Ductile iron piping is generally designed to accommodate a type of joint known as a push-on joint. This type of joint is advantageous due to its ease of installation and flexibility, allowing for slight movements in the pipeline without compromising the integrity of the connection. The push-on joint consists of a bell end that receives a plain end of the pipe, which is typically lubricated to facilitate the insertion. This design provides a reliable seal and is suitable for a variety of pressures and conditions.

The use of push-on joints with ductile iron piping is common because they can be installed without special tools or equipment, making them cost-effective and efficient in various water distribution applications. Furthermore, the configuration of the push-on joint helps in maintaining alignment and reducing the potential for leakage, which is critical in water distribution systems.

In contrast, other joint types like welded joints require high temperatures for assembly and specific skill sets, making them less practical for ductile iron piping. Socket joints are often associated with pipe materials like PVC or copper, and while flanged joints can be used in ductile iron systems, they are typically reserved for applications where disassembly is necessary, adding complexity to the installation process.