Engagement développement durable - Saint Gobain PAM

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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 trenchSTANDARD Vi, UNIVERSAL Vi,
EXPRESS Vi and STANDARD V+i
UNIVERSAL Ve, PAMLOCK
and STANDARD Ve
Directional
drilling
Cannot be usedUNIVERSAL Ve
Underwater
laying
Cannot be usedUNIVERSAL Ve, PAMLOCK,
STANDARD Ve
CasingSTANDARD Vi et UNIVERSAL Vi
Usable for short, straight sleeves
UNIVERSAL Ve, PAMLOCK,
STANDARD Ve
Above groundBridgeSTANDARD Vi, EXPRESS Vi
and UNIVERSAL Vi
For short-span bridges only
UNIVERSAL Ve, STANDARD Ve
All types of bridges, including long-span
Tunnels
and technical
areas
STANDARD Vi, EXPRESS Vi,
UNIVERSAL Vi and STANDARD V+i
Hydraulic thrust forces compensated
by suitable support devices
UNIVERSAL Ve, STANDARD Ve
Hydraulic thrust forces compensated
by suitable support devices
Buried or
above ground
Steep inclineSTANDARD Vi, EXPRESS Vi,
UNIVERSAL Vi and STANDARD V+i
Compensate sliding loads at top of slope
and, if slope is long, at several points
along the slope
UNIVERSAL Ve, STANDARD Ve
and PAMLOCK
Compensate sliding loads at top of slope
and, if slope is long, at several points
along the slope

 

Laying techniques

Aerial pipelaying
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.
Underwater pipe laying
A drinking water supply or irrigation project can include an underwater section: crossing a stream on the pipe route, intake in a lake or impounding reservoir in altitude, laying along a stream bed.
Steep incline pipelaying
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 pipelaying
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.