Static burstlining is an environmentally friendly installation technique for rehabilitation of defect or insufficiently sized pipes by utilizing existing pipe routes.
In dynamic burstlining, a rod is being pushed into the old pipe. Having reached the target pit or manhole, the burst head and the expansion body as well as the new pipe are attached. A cross-section expansion by up to two nominal diameter is possible. By simple static pulling of the rod, the old pipe is being destroyed while the new pipe is being pulled in. In this process, tough materials such as steel and ductile iron are cut open, whereas brittle materials (stoneware, concrete, grey iron etc.) are broken in shards – the fragments of the old pipe are radially displaced into the surrounding soil.
Burstlining places high demands on the new pipe. Fragments of the old pipe cause scratching and notching of the new pipe. Furthermore, the pipe is stressed with high point loads. For these reasons, the use of protective layer pipes is recommended in DVGW Code of Practice GW 323.