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.
| Pipeline location | Laying technique | Insert type anchoring | Bead type anchoring |
|---|---|---|---|
| Buried | Open trench | STANDARD Vi, UNIVERSAL Vi, EXPRESS Vi and STANDARD V+i | UNIVERSAL Ve, PAMLOCK and STANDARD Ve |
| Directional drilling | Cannot be used | UNIVERSAL Ve | |
| Underwater laying | Cannot be used | UNIVERSAL Ve, PAMLOCK, STANDARD Ve | |
| Casing | STANDARD Vi et UNIVERSAL Vi Usable for short, straight sleeves | UNIVERSAL Ve, PAMLOCK, STANDARD Ve | |
| Above ground | Bridge | STANDARD 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 incline | STANDARD 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
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.
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.
Laying a socket pipe system through a tunnel involves: support, accommodation of thermal expansion and anchorage of components subjected to hydraulic thrust.
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.
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.
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 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.