The  electrofusion  welding  process  is   used   for emergencyrepairs or when welding has to be  done in small places orin positions not accessible  by  a welding  machine.  The  joints are  achieved  using electrofusion welding sockets.

• Cut the pipe at right angles to  the pipe axis using suitable pipe cutter.

• Clean the parts of the pipe to be welded and the fitting in order to avoid any dust or sand that  might  damage  the  quality of the joint.

• Remove the  welding  electrofusion sockets from      their     protective     packing and immediately   fit   the   pipes   ends   in  the welding   socket;     the    correct    depth   of connection  is  when  the  pipe  touches the stops.

• Hold the pipes  in their  position  during  the welding process.

• Connect the welding machine to the welding socketand  start   the   welding   machine. The springing  out   of   the   two  indicator  pins indicates  that  the  heating time has ended.

• Disconnect  the  welding  machine  from the welding socket.

• When     welding     is    completed, it is recommended  not to apply  an   mechanical stress   (by  deflections,  torsions,  tractions)  to  the  joint  for  at  least  20  minutes.