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Types of laying

Technical solutions

Ductile cast iron pipelines are suitable for all soil types. Saint-Gobain PAM offers a comprehensive network that can adapt to any environmental or soil conditions.

Recommanded self-anchoring solutions for different locations and pipe-laying techniques
Pipeline
location
Laying techniqueInsert type anchoringBead type anchoring
BuriedOpen trenchRAPID Vi, UNIVERSAL ViUNIVERSAL Ve, PAMLOCK
and RAPID Ve
Directional
drilling
Cannot be usedUNIVERSAL Ve
Underwater
laying
Cannot be usedUNIVERSAL Ve, PAMLOCK,
RAPID Ve
CasingRAPID Vi and UNIVERSAL Vi
Usable for short, straight sleeves
UNIVERSAL Ve, PAMLOCK,
RAPID Ve
Above groundBridgeRAPID Vi and UNIVERSAL Vi
For short-span bridges only
UNIVERSAL Ve, RAPID Ve
All types of bridges, including long-span
Tunnels
and technical
areas
RAPID ViUNIVERSAL Vi
Hydraulic thrust forces compensated
by suitable support devices
UNIVERSAL Ve, RAPID Ve
Hydraulic thrust forces compensated
by suitable support devices
Buried or
above ground
Steep inclineRAPID ViUNIVERSAL Vi
Compensate sliding loads at top of slope
and, if slope is long, at several points
along the slope
UNIVERSAL Ve, RAPID Ve
and PAMLOCK
Compensate sliding loads at top of slope
and, if slope is long, at several points
along the slope

 

Laying techniques

Aerial pipe laying
Laying of a main above ground involves determining : the support system, the accommodation of thermal expansion and the anchorage of components subjected to hydraulic thrust.
Pipe laying in casings
Laying of a carrier pipe through a casing involves: the centring and guidance of each component within the casing, anchoring the components together to allow pulling of the section through the casing.
Pipe laying through tunnels
Laying a socket pipe system through a tunnel involves: support, accommodation of thermal expansion and anchorage of components subjected to hydraulic thrust.
Steep incline pipe laying
Laying of ductile iron mains on steep inclines can be performed in two ways: using concrete blocks for each pipe, using a concrete block at the head of an anchored length.
Trenchless pipe laying
Ductile iron pipes DN 60 to 1000 can be laid without a trench using either techniques: new pipe laying by horizontal directional drilling (HDD), or trenchless replacement of existing pipes.
Bridge crossing pipe laying
Bridge crossing with a push-in joint involves determining: the support system, the accommodation of both bridge and main thermal expansions, the anchoring of components subjected to hydraulic thrust, and the protection against freezing, if necessary.