System descriptions:

The MSL recess pipe is a folded spiral pipe that is left-handed and bent in a helical shape with reinforcement beads of 2.5 mm to 9 mm bead height. The material strength of the pipe has a diameter of 0.20 to 0.75 mm each.
MSL recess pipes are waterproof so that no cement glue can penetrate inward when the pipe vibrates.

MSL recess pipes have a very high traverse load stability and also have a high crown load stability which is effective during transport, storage and processing of the pipes.

Recess pipes from diameter 40 to 80 mm can be connected to a train of pipes with screw-in connectors (nipples) or screw-on connectors (bushings). (Only upon request because not in stock).

It is also possible to have the pipe produced at a prescribed radius, i.e. bent on one side depending on the pipe diameter.

Material:

Cold-rolled steel plate galvanised or black depending on availability. The pipes are kept in stock primarily in 3 and 6 m pipe lengths.