Electrofusion welding, butt welding, flange connection, and double spigot & socket jointing are used in joining HDPE pipes and fittings. The joint is as strong as or even stronger than the main pipe. Leakage is unlikely to occur at the joint.

1) Electrofusion welding. Electrofusion welding technique is widely used for jointing polyethylene pipes and fittings all over the world. Due to the steel framework inside Steel-Reinforced piping products, the clearance between the pipes and fitting have much greater influence on the fusion quality of the joint than pure polyethylene pipes and fittings do. To solve this problem, a special cone shaped structure is used for the pipe end and the inside wall of the fitting to ensure quality welding. Electrofusion welding technique is mainly used for jointing of pipelines to be buried.

2) Flange connection. Flange connection is made to the pipe end by injection molding technique. Flange connections are mainly used for above-ground piping system and connections of Steel-Reinforced HDPE pipes to metal pipes or other piping components (such as pumps, valves, etc.), or for pipe sections where disassembly may be required.

3) Butt welding. Butt welding is used for joining large diameter pipes. The pipe ends to be joined are designed thicker to ensure that the joint has the same strength as the main pipe.

4) Double spigot and socket jointing. Pipes and fittings can be connected with a sleeve and sealing rings at both ends.

5) Tapping saddle fusion. A tapping saddle can be joined to the sidewall of an existing pipeline. The structure of the Steel-Reinforced HDPE tapping saddle is basically the same as that of pure polyethylene pipe saddle. The tapping saddle is mainly used for branching from an existing gas or water pipeline under pressure.

6) Cutting pipes and sealing pipe ends at pipeline installation site. A normal electric handy cutting saw can be used for cutting Steel-Reinforced HDPE pipes. As for large diameter pipes, a special pipe cutting machine has been designed for this purpose. A mini-type extruder has also been developed for sealing the pipe ends after the pipe is cut off.