The conventional technique to join a saddle to the side of a pipe consists of simultaneously heating both
the external surface of the pipe and the matching surface of the saddle type fitting with concave and convex
shaped heating tools until both surfaces reach proper fusion temperature.
Standard Saddle Fusion Joint
The Plastics Pipe Institute recommends that saddle fusion joints be made only with a mechanical assist tool, providing
proper alignment and force control, unless hand fusion is expressly allowed by the pipe and/or fitting manufacturer.
PPI Technical Report TR-41, Generic Saddle Fusion Procedure for PE Gas Pipe
and ASTM International 2620
provide recommended practices
for the generic saddle fusion joining procedure.