He design specification for automatic sprinkler systems requires system pipelines to use grooved connectors, screw thread, or flange connections; pipes with a diameter equal to or greater than 100mm within the system must use flanged or grooved connectors in sections. Grooved pipe connection technology, known as clamp connection technology, has become a primary method for liquid and g... https://www.furdfittings.com/global-leader-in-malleable-iron-grooved-pipe-fittings/