Design principles of straight rubber pipes
The structure of rubber pipes is illustrated in the cutaway view drawing. The rubber inner surface layer contacted by the material transported can be selected in accordance with the application at hand.
When abrasive materials are transported, particularly elastic rubber formulations are used with high elongation at break, providing long service life. Also for high corrosion resistance we can draw on an extensive range of available formulations collected in a decade’s experience in premium-quality rubber development.
The next layer under the inner rubber layer is the pressure-bearing layer made of special cord fabric. The cord fabric layers are anchored in a massive steel core within the rubber bulge of the flange. The profiled flange of the GUR mates with this bulge, providing a design configuration capable of withstanding extremely high tensile forces.
Directly under the fabric layer is a reinforcing layer typical of rubber pipe. This is a multi-layer steel design that ensures dimensional stability and prevents thermal expansion as required for compensator-free pipelines.
Finally the outside surface is a weather-resistant rubber formulated for the specific application, therefore ensuring complete encapsulation of the GUR rubber pipes system by fully vulcanised rubber.
The flange connections on the ends of rubber pipes incorporate sealing surfaces with integrated “O” ring seals. Additional seals are not required. Rubber pipes can be installed with low bolting torque. In spite of these low forces, the flange connections are permanently pressure-tight and are not physically damaged by very high pressures. Further information is provided in the installation information.