China Uses slurry to cut drag and protect pipe coatings. Manufacturer, Supplier, Factory

Flange is a "Connector": Used to permanently connect pipes and equipment; it is the foundation for building the system. Dismantling Joint is a "Maintenance Component": Used to facilitate the disassembly of specific equipment; it is an assistant for system maintenance. With its unique telescopic structure and limit bolt design, it allows you to create space for equipment removal by loosening only a few nuts, avoiding the hassle of removing numerous flange bolts or cutting pipes.

The classification of ductile iron pipes first depends on their joint connection types, which directly determine installation methods and engineering adaptability. The most common flexible push-on joints (such as Tyton joints) utilize compressed rubber gaskets to achieve self-sealing, allowing post-installation angular deflection (typically 3-5 degrees) to accommodate ground settlement or thermal movement. Another type, mechanical joints (like K-type or Fastite joints), employ bolted gland rings to compress wedge-shaped gaskets, providing higher sealing integrity suitable for pump station valve connections requiring frequent maintenance. Flanged joints feature steel flanges cast or welded to pipe ends, creating rigid connections via high-strength bolts, specifically designed to withstand high-pressure thrust or interface with industrial equipment.

The contact pressure generated by the compression deformation of the rubber ring acts as a self-sealing, and the hard rubber part of the rubber ring acts as a fixed centering function. The interface can be deflected to adapt to a certain foundation settlement and achieve long-distance steering installation.

Choosing the right water valve type depends on the application needs, including: primary function (on/off, throttling, backflow prevention), required flow rate (full port valves have low resistance), operating pressure and temperature, fluid type (clean water, wastewater, chemicals), frequency of operation, space constraints, and cost.

​If ductile iron pipes are compared to the "blood vessels" of the city, then ductile iron pipe fittings are the "joints" that allow these blood vessels to operate flexibly. These seemingly inconspicuous connecting parts play a vital role in various pipeline projects.