Mean outside diameter

Mean outside diameter ($d_{em}$)

• The value of the measurement of the outer circumference if a pipe or spigot of a fitting in any cross-section, divided by π(≈3.142), rounded to the next greater 0.1 mm.

References

1. BS EN 1329-1:1999 (p.8) Plastics piping systems for soil and waste discharge (low and high temperature) within the building structure – Unplasticized poly (vinyl chloride) (PVC-U) – Part 1: Specifications for pipes, fittings and the system