Lining of Pipes and Fittings

Although any size piping can be lined with fluo-ropolymers, typically sizes up to 12 (30 cm) are available off-the-shelf Piping above 12 is specially made. Lined piping is governed by ASTM F1545. 

Lined piping and components can be made by one of the following processes  

Processing of PTFE is a special case since it has to be processed using the powder metallurgy technique of compaction and sintering. This is done in the following sequence  

The extended liner is flared over the flange face. 

and PFA liners are made by simple extrusion and inserted in the metallic housing, similar to PTFE. 

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