The pipe type D is produced in accordance with DIN 16965 Part 4 with either UP or vinyl ester resins. The minimum thickness of the chemical protection layer is 2.5mm, the structure contains 1 layer of C-glass fleece or a synthetic fleece with a subsequent multi-layer glass mat structure made of E-glass (glass content of approx. 25-30%). The load-bearing laminate has a glass content of 60 (+/- 5)% and consists of fabric, mats and / or glass rovings made of E-glass. A pure roving structure is not permitted with this type of tube.
The outer layer also contains a C-fleece with a weatherproof finish of 0.2mm.
