33
Wavin AS+
Technical Manual
Double branches must not be used with horizontal pipes.
Changes of direction in horizontal pipes in open-shaft and
enclosed-shaft configuration must likewise be carried out at
an angle of ≤ 45°.
Note
Reducers/extensions of underground and collector pipes
should be level.
Underground collector pipes
If plans and calculations contain no prior definition of pipe
material, nominal diameters and usage can be based on the
calculation tables in DIN 1986-100 (Annex A, Tables A.3 to
A.5).
Calculated drainage performance is based on the smallest
possible internal diameter, in accordance with the nominal
size given in DIN EN 12056-3, 2001-01, Table 1.
If the material is known (e.g. Wavin AS+), sizing can also be
performed based on the actual internal diameter.
The tables referred to are reproduced on the following pages
of this waste water manual.
Sizing tables for underground and collector pipes
The sizing tables are reproduced on the following pages.
Please note that a distinction is made between the tables
conforming to DIN 1986-100, Annex A, and the tables corres-
ponding to Wavin AS+. The tables are further differentiated by
the maximum filling factor h/di of 0.5, 0.7 or 1.0.
Calculation
Hydraulic criteria for the sizing of underground and collector
pipes
Filling factor h/di = 0.5 inside buildings
Filling factor h/di = 0.7 outside buildings
Filling factor h/di = 1.0 upstream of volume flow inlets
running from a waste water pump station outside the
building upstream of a drain shaft with open flow
Filling factor h/di = 1.0 in the case of mixed-water pipes
measuring at least DN 150, upstream of a drain shaft with
open flow
Minimum fall J = 0.5 cm/m inside buildings
Minimum fall J = 1: DN outside buildings
Minimum flow rate of 0.5 m/s inside buildings
Minimum flow rate of 0.7-2.5 m/s outside buildings
Min. 1.5 m
For collector pipes
Min. 1.5 m
Flow direction
Flow direction
Fig. 19: For collector pipes.
Fig. 18: Underground collector pipes.