BUTTING – Noise reducing pipes

At the end of the seventies BUTTING was asked by customers from the petro- chemical industry to develop a noise reducing pipe for pneumatic conveyor systems.
During the transport of plastic granulars and production speeds of 10–40 m/sec noise levels of up to 120 dB are caused, especially when the granulars hit the walls of the elbows. An insulation of the pipelines from the outside did not prove successful, as the heat input via the pipe wall would have caused melting of the granulars, resulting in the formation of a film on the pipe walls.

The problem was solved successfully by using double wall pipes and elbows. The result was impressing. The gap between the inner and outer pipe caused a noise reduction of more than 15 %, e. g. from 115 dB down to 95 dB, measured by an independent institute at the chemical plant of Erdölchemie in Dormagen. Noise reducing pipes can be supplied in outside diameters from NB 50 up to
NB 300.

Imagination and the willingness to comply with the customers' special requirements have provided reliable and cost effective life veins in modern plants.

BUTTING – Progress by Tradition