84 Cable protection SRS, SRE-P and SRS with power cable and for optical fibre Extena is a leader in the development and manufacture of cable protection pipes within its product category in the Nordic region. Our products have a significantly higher quality and ring stiffness than standard requirements and offer both more efficient laying, lower total costs and a safer service life compared to traditional laying of power cables in a sand bed. As more and more grid companies realize the benefits of cable protection, our business in this area has grown dramatically. Today we supply cable protection for both large and small projects. We offer cable protection pipes for class SRS and SRE-P. SRS (protection, pipes, difficult conditions) is our standard pipe that complies with SPF work standard 5200 and SP Technical Research Institute of Sweden’s inspection guidelines SPKB 1992:06, while SRE-P (protection, pipes, extra difficult conditions – plastic) is used for surface laying in difficult terrain. Our SRE-P pipes are manufactured according to SS 424 14 37. Both pipes are manufactured from high density polyethylene (PEHD). Extena’s SRS and SRE-P cable protection pipes have a grooved interior to reduce friction when pushing through power cables. We see this as a big advantage. The use of cable protection pipes instead of a sand bed also provides more efficient propulsion, safer pipelaying and lower total costs. Cable protection pipe SRS is also available with predrawn power cable N1XE-AR 4G25. We also offer cable protection pipes for optical fibre in standard dimensions and in the special dimension 40/29 with extra high ring stiffness. Higher ring stiffness than standard This is a big difference in the quality and ring stiffness of the cable protection pipes available on the market. The standard for the ring stiffness of cable protection pipe SRS is 8 kN, which in our opinion is far too low for pipelaying without a sand/rock flour bed. To ensure a long and safe service life, we manufacture our pipes with a ring stiffness of over 16 kN, in other words significantly higher than the standard. Be aware that low price pipes are imported into the market that just meet the requirements for ring stiffness. There is a risk that these pipes will not withstand stress over time. However, with Extena cable protection pipes you can be sure that you will get a secure system with a long service life. Quality at every stage Our products undergo very thorough quality control, both in our own testing laboratory and at external inspection institutes. In this important task, we collaborate closely with the research institute RISE. Another aspect of our quality assurance is that we have full traceability of the materials that we use. Pipes for rough terrain Our cable protection pipes are specially designed for tougher terrain where high strength is a requirement. They are manufactured from high density polyethylene (PEHD) and have a ring stiffness (over 16 kN) that is significantly higher than standard requirements (8 kN). The pipes have a high resistance to external pressure and stress and are also resistant to most chemicals. They are also sealed to prevent the penetration of ground water and soil or sand. Quite simply, Extena’s cable protection pipes provide highly reliable protection for electrical cables – and thus offer optimal weather protection. Cable protection pipes SRS and SRE-P for power cables. Extena offers cable protection pipes for both SRS and SRE-P. SRS (protection, pipes, difficult conditions) is our standard pipe that complies with SPF work standard 5200 and RISE’s guidelines SPKB 1992:06, while SRE-P (protection, pipes, extra difficult conditions – plastic) is used for surface laying in difficult terrain. Our SRE-P pipes are manufactured according to SS 424 14 37. Both pipes are manufactured from high density polyethylene (PEHD). Extena Prefab Kraft. SRS-rated cable protection pipe with predrawn power cable. Extena Prefab Kraft is an SRS-rated cable protection pipe with a predrawn power cable designed primarily for utility services in buildings, but is also used as a problem solver for other applications such as repairs and temporary installations. Extena Prefab Kraft make installation easier as the power cable is already installed in the cable protection pipe. The result is fast, efficient and easy pipelaying. Prefab Kraft is manufactured at our factory in Norsjö and is supplied with a dimension of 50 mm in lengths of 250 metres on a K16 drum. The SRS pipe is also approved for temporary open pipelaying. Optical fibre For over 20 years, Extena has manufactured and supplied optical fibre ducting for the expansion of infrastructure throughout Sweden. Extena Cable Protection Opto is a low friction pipe with a smooth interior that can also be ordered with a silicone coating, allowing the installation of several kilometres of optical fibre cable, either by injecting air or by flushing with water. In addition to the standard pipe, Cable Protection Opto is also available in dimension 40/29, a special dimension with extra high ring stiffness for a safe service life in demanding environments. This product is designed primarily for wind farms and for joint pipelaying projects in rough terrain along with SRS. Demand for dimension 40/29 has increased sharply in recent years. Cable protection pipes
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