Plastic Pipes Conference Association # 2001 Munich
Frank
Due to an increased environmental awareness, also in the field of sewerage, the problems with leaking drains have been given special emphasis. As sewage systems and treatment plants are often converted from mixed wastewater to concentrated, highly polluted water, leakproof pipelines are urgently needed today.
However, investigations have shown that not only old pipelines, but even newer pipes are leaky. The reasons for this are often conceptual, like unsuitable pipe and socket materials resulting in leaky socket connections. Additionally, pipelines made of rigid materials involve the danger to break down abruptly in case of overload - leading to brittle fracture. Due to cracks and fragments, the pipeline can also lose its static loading capacity
Related papers
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The Cyclic Cracked Round Bar (CRB) Test has been applied to study the slow crack growth (SCG) resistance of virgin, recycled, and reprocessed PVC-U. This fracture mechanical test allows a quick ranking of the SCG resistance of PVC-U. A clear correlation between the K-value and the SCG resistance has been elaborated....
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The cyclic cracked round bar test has recently been added as a full-fledged ISO standard (ISO 18489) for comparison of polyethylene pipe grade materials’ slow crack growth resistance. However, possibilities of this test are yet far from being exhausted. Seeing, that polyethylene is only used in approximately 30% of...
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