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This article is devoted to assessing the possibility of using the clamping technique to close gas flow on gas pipelines built of PA12 polyamide pipes. During the construction of gas pipelines, operating works on active gas pipelines, as well as during the use of gas pipelines, there is sometimes a need to limit or close the gas flow. In polyethylene gas pipelines, this technique has been successfully used for years. For polyethylene pipes, the PN-EN 1555-2:2012 standard presents the general requirements for the clamping technique. The requirements for pipeline systems built of PA12 polyamide are specified in the standards of the ISO 16486 series. These standards do not give any, even general requirements, for the technique of clamping. The ISO 16486 standard in part 6, i.e. the Code of Practice for Design, Operation and Installation, only states that when using the clamping technique, the manufacturer’s instructions must be followed but there are no detailed guidelines for performing this process. The clamping technique carried out according to incorrect procedures or in an uncontrolled manner may have a negative effect on the hydrostatic strength of PA12 pipes or lead to pipe damage. As part of the work carried out at the Oil and Gas Institute – National Research Institute, it is planned to carry out tests on polyamide pipes after clamping operations. This was to help determine the impact of clamping on the strength parameters of PA12 polyamide pipes. As part of the implementation of the work based on the conducted analysis, the conditions in which the clamping processes were carried out were established. Clamping was carried out on various samples under various conditions and according to different procedures. Autor do korespondencji: A. Wróblewska, e-mail: anna.wroblewska@inig.pl Artykuł nadesłano do Redakcji 11.01.2019 r. Zatwierdzono do druku 16.07.2019 r.

Stosowanie techniki zaciskania do zamykania przepływu gazu w gazociągach z poliamidu PA 12 o maksymalnym ciśnieniu roboczym 1,6 MPa