PAM Directional
PAM Directional is a new product in the UK brought to the market thanks to the extensive experience and expertise of the worldwide Saint-Gobain PAM UK team. A simple and effective ductile iron solution to situations where open cut trenches are not suitable or possible.
Application
PAM Directional ductile iron directional drilling pipes can be used for both water and sewer applications.
Diameter Range DN 100 - DN 700
Universal Ve self-anchored push fit joint (see also section on Joints).
Tyton or Rapid gasket.
Coating - 200mg zinc plus 5mm cement (ZM-U). A highly robust & rigorously tested protective coating, suitable for all drilling & soil conditions (e.g. rocks, aggressive soil, etc). In no circumstances is further protection required.
Lining - Water (EN545) Blast furnace cement, Sewer (EN598) Alumina cement.
The water pipe is approved for use with potable water by the Secretary of State for the Environment, Transport and the Regions in accordance with Regulation 31 of the Water Supply
(Water Quality) Regulations, 2000.
Experience
These pipes have been used in numerous projects across Europe over the last 10 years. There have been no experiences of joint or pipeline failure. The maximum length carried out to date has been 1,500m using a DN 150. The longest project in a larger bore currently stands at 1,100m of DN 600 PAM Directional pipe. Further details about the projects carried out are available; including some case studies (please refer to the Downloads section).
Installation Calculations & Technical Support
Saint-Gobain have developed a tool that will calculate the exact pulling forces required on a specific project and will also make weight and lift calculations to ensure that the pipe is correctly balanced in the drilling channel. This tool will ensure optimal installation.
Project information required for these calculations:
- Diameter of pipe intended for use
- Length of project
- Application
The calculation tool assumes the use of 1.3Kg/dm3 density of bentonite as standard.
The drilling channel is required to be 1.3 times the diameter of the socket of the pipe.
On a 6m long pipe with a deflection of 3 degrees, the maximum joint offset of each pipe can be 314mm. Therefore the minimum radius achievable on 3 degrees of deflection will be 115m.
On a 6m long pipe with a deflection of 2 degrees, the maximum joint offset of each pipe can be 209mm. Therefore the minimum radius achievable on 2 degrees of deflection will be 172m.
No additional site equipment is required for directionally drilling with ductile iron pipe, the same drilling rigs etc. can be utilised. Ductile iron specific pulling heads are available to order with the pipe.
Full technical support is available from an experienced team of engineers, either by telephone or where required, through visits to site.