Figure 9 - uploaded by Guido Quesada
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This paper reviews recent developments in integral joint restraints for PVC pipe, of the type comprising a rubber seal and a casing with a raceway for a "C" grip. These components are integrated in the socket when it is heated until soft and formed over them. Among the developments are grips with progressive tooth height and a backward-leaning prof...
Context in source publication
Context 1
... tests by Microbac in the USA, on their DN 110, 160 and 200 joints, reached breaking loads between 2.9 and 3.8 times the equivalent thrust from the pipe's PN, that is 1.4 to 1.9 times the trust from a 2xPN test pressure. As usual in static loading, the pipes would break at the "C" grip (Figure 9), which highlights the importance of improving the bite. Some specimens also broke at the pulling head instead of the joint. ...
