(2) On the pipe fittings, the e-PSP steel-plastic composite pipe is a plastic pipe fitting (bearing 2.5MPA), and the PSP steel-plastic composite pipe fitting connected by mechanical flaring is a cast iron pipe fitting, which has high cost, heavy weight and complicated installation, and is not convenient for high-altitude construction.
(3) In connection mode, the e-PSP steel-plastic composite pipe adopts intelligent connection, and the welder is light in weight. The operation flow is 1, which is simple, fast and safe. PSP steel-plastic composite pipe connected by mechanical flaring needs flaring, rounding, placing inner sleeve and flange connection, which is time-consuming and laborious.
(4) In terms of pipeline system safety, the e-PSP steel-plastic composite pipe can only be connected, so that the pipes and fittings are completely integrated, the pressure-bearing steel belt layer is completely plastic-sealed, and the inside and outside are completely isolated from water and air to ensure the pressure-bearing capacity and pipeline strength. PSP with mechanical flare connection is flange connection. General bolt inspection and reinforcement needs about 1 year and a half, and the rubber ring of the inner bushing also has aging problems, which is a risk of water leakage.