The iMPREGLiner is only produced in Germany, in the Stuttgart area. At the Ammerbuch site, we currently employ 60 production employees in full shift operation.

Production consists of the following areas

  • Goods inwards
  • Dry production
  • Impregnation
  • Carpentry
  • Delivery / dispatch
  • Testing laboratory
  • Metalworking department


When goods arrive, the raw materials are checked in accordance with the respective testing procedure and compared to the supplied test results. Approval for production is granted by the in-house laboratory only once the goods inwards test has been passed.


In this area, the pipe liner is made from a glass-fibre complex using a patented procedure. This “dry” pipe liner is then impregnated with synthetic resin according to the customer’s wishes in another stage of the impregnation.

The dry liner is manufactured on three production lines, which work in shift operation. Pipe liners up to DN 400 are produced on the small equipment. Pipe liners from DN 300 to DN 700 can be made on the medium-sized equipment. All pipe liners larger than DN 700 are produced on the large equipment.

Changes of dimensions, special sizes and special shapes are made up individually according to the customer’s wishes. The manufacture of these special pipes is a particular strength of iMPREG.


The impregnation of the dry liner is the second stage in the manufacturing process of the iMPREGLiner. Here, the glass-fibre pipes are impregnated with an injection procedure.

The three impregnation lines work in shift operation, whereby sizes up to DN 400 are produced on the small equipment. On the medium-sized equipment, liners up to DN 1200 can be impregnated and the large equipment is designed for up to DN 1600.


The dispatch boxes are manufactured in our in-house carpentry. This gives us the greatest flexibility possible when manufacturing the liner and saves storage space for the finished boxes.


The finished goods are brought together for dispatch in the dispatch area. Before being sent out for delivery, a final check of each liner is made by the testing laboratory.


The testing laboratory monitors the goods received, carries out tests on the materials used during production and carries out the final check of the finished product.


A production company in full-shift operation must be in a position to keep the manufacturing systems working at all times. Our metalworking department ensures, to a large extent, that our delivery schedule is adhered to for our customers. Technical problems with the equipment can thus be rectified as quickly as possible, so that a possible interruption in production does not have any effect on the delivery schedule.