Optimal wear protection lining for pipes or bends can also consist of a combination of different materials. Kalenborn offers special pipes and bends, the lining of which is specifically designed for various stresses, such as in the example of a biosolids recycling plant. The ducting runs between the dryer, where the biosolids emerge at temperatures of 100° C or higher, and the baghouse, where the material cools and is separated. As part of a complete system designed by an OEM, Kalenborn installed about 65 m² of 5-foot (1524 mm) diameter ducting. For optimal wear-resistance, Kalenborn installed ABRESIST fused cast basalt lining on straight runs, 25-mm KALOCER oxide ceramic on elbows, and KALCRET hard compound on the inside radius.