HDPE pipe and fittings are welded in the ways of butt fusion, socket fusion and electrofusion. The strength of joint point is higher than the tube itself. 4. Higher flow capacity The smooth inner wall is easy for pipeline transportation .Under the same condition delivery capacity can be increased by 30%. 5. Convenient for construction and installation HDPE pipe could be installed in a variety of trenchless ways, so it is very convenient for construction and installation. 6.Lower maintenance costs HDPE pipe fittings are not only convenient to transport and install, but also reduce the workerâ??s labor intensity and improve work efficiency. 7. Longevity 50 yearsâ?? service lifespan under reasonable condition. 8.Recycled and environment-friendly. No scaling, no breeding of bacteria, solving the secondary pollution of drinking water.