The Durability of a Low-pressure Gas Distribution System of Ductile PVC
TL;DR: In this paper, the long-term performance of the socket joints, in which elastomeric (NBR) sealing rings are used, is evaluated, and the results once again show that ductile PVC pipe systems for low-pressure gas distribution exhibit an excellent (long-term) performance.
Abstract: One of the options for a low-pressure gas distribution system is the use of ductile PVC pipes and joints. The long-term performance of ductile PVC pipes has been reported in a number of previous studies. In this paper the long-term performance of the socket joints, in which elastomeric (NBR) sealing rings are used, is evaluated. The long-term quality of socket joints in ductile PVC pipeline systems has been determined by various tests on a number of excavated joints, which have been in operation for more than 20 years. Leak tightness determined according to the present specifications did fulfil all requirements. The quality of the rubberrings , established by e.g. tensile testing and hardness tests, was also still at the level of new rubberrings. The socket joints started only to leak at deflections of the pipes far exceeding the deflection levels met in field practice. The compression set of the excavated samples was also rather low and extrapolated to long times will not exceed a maximum required value of 70 % before 50 years. These results once again show that ductile PVC pipe systems for low-pressure gas distribution exhibit an excellent (long-term) performance.
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Citations
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Cites background from "The Durability of a Low-pressure Ga..."
...The literature (Ars enio, 2013; Meijering et al., 2004) indicates that leakage is possible only under extreme cases (deflection, >36%; bending angle, >10 and complete pull-out) and root intrusion is impossible, given that installation is proper (Sadler et al., 2001)....
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...Meijering, Wolters, and Hermkens (2004) studied double socket joints that had been for up to 30 years in service of PVC gas-distribution systems....
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3 citations
Cites background from "The Durability of a Low-pressure Ga..."
...Meijering, Wolters, and Hermkens (2004) performed destructive laboratory tests with PVC gas pipes in order to detect leakage during radial deflection of the pipes whereby during the tests, pipes were pressed radially next to the joint....
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1 citations
References
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