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Parallelismi Sovrappassi Sottopassi rete gas con altri servizi
La UNI 7129-1 al punto 4.5.1.3.4 specifica che nel caso di parallelismi, sovrappassi e sottopassi fra i tubi del gas ed altre canalizzazioni, la distanza minima, misurata fra le due superfici affacciate, deve essere tale da consentire gli eventuali interventi di manutenzione su entrambi i servizi e dove necessario, la tubazione del gas deve essere posta in guaina per evitare il pericolo che accidentali trafilamenti di gas possano interessare le canalizzazioni su indicate. Nei parallelismi la guaina deve essere prevista per lâintero tratto interrato se la tubazione del gas e le altre canalizzazioni sono ad una distanza minore di 1.000 mm. Nel caso di sovrappasso e sottopasso la guaina si deve estendere per non meno di 1.000 mm da entrambe le parti. Per le tubazioni metalliche le distanze di rispetto da cavi elettrici, telefonici e simili, non in cunicolo, devono essere conformi alle specifiche norme CEI.
Riferimento normativo
UNI 7129-1:2015: âImpianti a gas per uso domestico e similare alimentati da rete di distribuzione – Progettazione, installazione e messa in servizio – Parte 1: Impianto internoâ del 01/12/2015. La norma si applica agli impianti domestici e similari per l’utilizzazione dei gas combustibili appartenenti alla I, II e III famiglia di cui alla UNI EN 437 ed alimentati da rete di distribuzione di cui alla UNI 9165 e UNI 10682. La norma fissa i criteri per la costruzione ed i rifacimenti di impianti interni o parte di essi, asserviti ad apparecchi utilizzatori aventi singola portata termica nominale massima non maggiore di 35 kW.