In underground construction reliability and security of all components are very important. Especially in shaft and route lines which can extend to kilometres, a long service duration of pipes is demanded in this field. All operational equipment must resist extreme loads and every premature failure costs time and money, regardless of safety-relevant aspects. Maintenance work shall be carried out only within the planned revision time periods; therefore the availability of the conveying line system must be secure. We consider these influence variables already in the planning stage and in the preparation of the quotation.Special circumstances require individual solutions. Therefore not only elbows, pipes and reducers are a part of a conveying line, but also compensators and bracket pipes for mounting in pithead buildings.Our conveying lines are designed for static and dynamic loading and protected against corrosion for the planned life-span and the environment.Our products have already been in used with great success for decades in all areas of the underground construction field.