View source for Elbow (pipe fitting)

*Pipe fitting used for change in direction in a pipe system
*[1]A type of pipe fitting which is also referred as Bends:
-unswept and swept angle  (see ISO 265-1:1998);<br />
-spigot/ socket and socket/ socket

[3]Swept angle is curved gradually. For elbows, the nominal angles (α) shall be 67 1/2° or 87 1/2° to 88 1/2°. When determining the laying length of curved (swept) entry fittings, generally similar principles are followed as are given for the determination of the laying lengths of direct entry fittings.

== References ==
#BS EN 1329-1:1999 
#Image reference: K 6739:2007 Unplasticized poly (vinyl chloride) (PVC-U) pipe fittings for drain 
#ISO 265-1 Pipes and fittings of plastics materials – Fittings for domestic and industrial waste pipes- Basic dimensions: Metric series – Part 1: Unplasticized poly (vinyl chloride) (PVC-U)