18 Mines The working environment in mines is extremely tough, not only for the miners, but also for all the tools and products used in the mining industry. Raw surfaces, blasting dust, coarse media and crushed rock transported and removed by heavy vehicles expose the environment to excessive wear and damage. Large level differences In addition to the external impact on pipes and pipe systems, the mine’s level differences also mean that high pressures are required to pump media from low to high points. Mining environments therefore require durable pipes that can withstand high pressure both inside and outside. Extena has two pipe systems specifically designed for high pressure applications: Extena homogeneous high pressure pipes and HexelOne®. Drill cuttings and slurry The transportation of e.g. drill cuttings and slurry (tailings and mine water) requires extra strong pipelines that can withstand both high pressures and excessive wear on the inside. Drill cuttings consisting of crushed rock with a grain size of up to 6 mm place great stress on the inside of pipes. Our durable, homogeneous multilayer pipe egeSlurry® with a protective inner layer is perfect for these types of demanding conditions. Static electricity In mines, static electricity is also generated when pumping dry and flammable media, for example. For these applications, we have developed egeStatic®, a co-extruded homogeneous pipe made of PE-EL that reduces the risk of static electricity generation. Prefabricated pipelines We can also offer prefabricated pipes with pre-assembled flange joints, which facilitates the jointing and installation of pipe systems in the mine. These pipes are joined on site and are available in dimensions up to 1600 mm. In addition, we offer several other types of pipes and pipe fittings that meet all the requirements of the mining industry. High pressures In mountain environments, mines and structures with large level differences, pipes are required to withstand high pressures. For this type of environment, we offer pipes that can withstand high internal pressures and which also have a high ring stiffness to withstand high external loads. The traditional method of handling high pressures in pipe systems is to increase the thickness of a standard pipe. However, Extena and egeplast can offer the unique and innovative multilayer pipe HexelOne®. HexelOne® consists of a main pipe made of PE100 RC, two reinforcement layers of PE100 and a protective sheath of 100% high strength PEplus. The result is a pipe system with a normal wall thickness that can withstand up to twice the pressure of traditional pipes (30 bar for water and sewage and 16 bar for gas). HexelOne® is therefore easier to handle and the high strength sheath also protects the pipe from external impact. Extena offers two high pressure pipe systems: Homogeneous standard pipes Pipes with increased thickness for high pressures. Available in dimensions 16–630 mm for 20, 25 or 30 bar. HexelOne® HexelOne® is a multilayer pipe with a main pipe made of PE100 RC, two reinforcement layers of PE100 and a protective sheath of 100% high strength PEplus. The result is a pipe that can withstand up to twice the pressure (30 bar for water and sewage and 16 bar for gas). High strength sheath protects against external impact. The Boliden mine uses pipes supplied by Extena. Introduction
RkJQdWJsaXNoZXIy MjcwMjg=