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TECHNICAL SOLUTIONS
RESPECT OF THE WATER FLOW
A sewerage pipeline must be able to absorb the environment
changes without deformation, crushing or ovalisation which
could result in interruption of the water flow.
Due to the mechanical properties of ductile cast iron, there is no
risk of breakage or misalignment during possible soil movements
or nearby excavations.
INTEGRAL ®
Offering the safety factors inherent to ductile
cast iron, PAM rigid and straight pipes
guarantee the quality of the water flow:
• the long pipe lengths and their smooth internal
wall contribute to self-cleaning,
• the fittings of cross-section identical to that
of the pipe and the elastomer joint gasket
guarantee centring and prevent the possibility
of blockages.
Flexible materials
Standard NF EN 476 specifies the allowable values
concerning the continuity of the water stream at
the junctions.
< 6 mm for DNs up to 300 0.02 x DN for
DNs > 300 (max. 30 mm). The allowable
difference on the PAM system junctions is always
below the requirements specified in the standard.
See watertightness / impermeability p.18.
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Saint-Gobain PAM - SEWERAGE - 2012