1、 Maintenance method for water leakage at the interface of electric melting and hot melting connection of pipes and pipe fittings

In this case, the pipes shall be cut off, and the pipes and fittings shall be connected again by electric melting and hot melting according to the construction requirements.

2、 Repair method for electric melting and hot melting connected pipes with small damage scope

In this case, the repair method of electric melting sleeve or modified saddle shaped electric melting pipe fittings shall be adopted to cut off the damaged parts of the pipes, and then connect them with electric melting sleeve or modified saddle shaped electric melting pipe fittings.

3、 Maintenance methods for pipes connected by electric melting and hot melting with large damage range

In this case, the damaged pipe section must be cut off and replaced with a new pipe. The interface can be connected by electrofusion, hot-melt connection or flange connection, but the last welded junction must be connected by electrofusion sleeve or flange connection.

4、 The repair method for the damage of the pipeline with the flexible connection of the socket type rubber ring.