Does Pipe Rehabilitation Shrink the Diameter Too Much?
When resin and laminate are applied during pipe rehabilitation, the inner diameter of the pipe naturally becomes smaller. Some homeowners may wonder whether this reduction could lead to problems.
But we can reassure you—it’s not an issue. The dimensions of drainage systems and pipe diameters are strictly regulated according to DIN standards (e.g., DIN 1986-100 and DIN 12056). The thickness of our rehabilitation materials stays well within the permitted tolerances, typically ranging between 2.5 and 5 mm, depending on the pipe size. This ensures that the minimum diameter remains guaranteed. Our systems comply with building regulations, so purchasing materials from us means you won’t run the risk of incorrect rehabilitation.
Additionally, pipes are cleaned before rehabilitation, which alone can slightly reduce their inner diameter. Essentially, rehabilitation restores the original pipe cross-section. If 2-3 mm of rehabilitation material is applied, a DIN 100 pipe undergoes a reduction of 3 mm on each side, resulting in a new inner diameter of 94 mm. This doesn’t factor in potential material wear on an old pipe. Even for SML pipes with a DIN 100 standard inner diameter of about 90 mm, this reduction remains within the tolerance range.
So, don’t worry! Our materials and rehabilitation products comply with all relevant regulations and are used successfully by professionals every day.
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