11
GB
CIVIL WORK AND INST
ALLA
TION
BUILDING SPECIFICATIONS
2
2.7. Drainage piping
Gutter and central trap drainage is via a number of pipes that run along the boundaries of the wash tunnel.
The pipes are PVC, with connection boxes and pits at intersection points where necessary.
The pipework facilitates the drainage of water coming from the wash tunnel, taking it to the sludge settler,
where water treatment starts for water to be recycled and reused in new wash processes.
•
Pipes
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PVC 160 mm minimum diameter
•
Slope
-
minimum 1.0%
•
Connection pits
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Perforated bricks, rendered and smoothed.
2.8. Rain gutters, with enclosure
Rain water is collected and channelled by separate gutters that run parallel to the drainage piping. As in the
previous case, the pipes are arranged on the sides of the wash tunnel.
For wash tunnels without an enclosure, rain water is collected together with that of the actual tunnel.
All pipes must be PVC, even the special parts.
Pipe slope should not be under 1.0%. Pipes must lean on a concrete or sand bed.
Couplings as per drawings, in connection boxes or pits built with bricks, rendered and smoothed. Pit dimen-
sions are indicated in the corresponding drawings.
Summary of Contents for Twash 4TA6000
Page 28: ...28 GB WITH ENCLOSURE CM 6 6 1 Adjoining bays...
Page 35: ...35 GB CIVIL WORK AND INSTALLATION Note DETAILS 7...
Page 40: ...GB 40...
