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april 2011

Materials and labelling of methane gas pipes

Labelling repeated on methane gas pipes at regular intervals for the sake of a correct identification.

The national scenario of methane gas pipes is regulated by the reference UNI CIG 7140 standard, which lays down the guidelines for the marketing of non-rigid pipes, in order to connect low power devices to the domestic gas distribution network. What is meant by low power is kitchens and other users with a lower power than 35kw.
The realization of methane gas pipes calls for the use of materials that are compatible with this fluid, in order to avoid a precocious degradation of the pipe itself. A plastic that suits this purpose fine is the PVC (synthetic resin) with which these conductors are built and which is also easy to process.
The standard, however, stipulates that inside the body of methane gas pipes there should be a fibre or metal core to absorb part of the efforts caused by the pressure of the gas itself.
Something worth remembering is that in spite of the fact that this product is sold in 50 metre rolls, it is not possible to use, for connections between user and distribution point, clips with a length in excess of 1500mm.
Methane gas pipes are approved by IMQ (Italian Institute of Quality Brand), and a correct identification both of the item and the expiry date necessitates that their labelling should be repeated at regular intervals, at a distance of 400mm each at the most.


See also
10/07/2014 Methane gas Pipe legislation Legislation governing methane gas pipes and recommendations on their installation

10/12/2015 Pipe for methane gas and the reference norm A multi-layer PVC pipe for methane gas with an intermediate layer in woven material for the sake of improving resistance to pressure.

10/09/2016 Flexible metal pipes of our catalogue Flexible metal pipes Gnali Bocia: the reference standard for the welding of fittings and the protective sheath

10/09/2016 Methane gas pipe in rolls complying with the UNI CIG 7140 standard Methane gas pipe in rolls to be cut to size while always abiding by the chunk lengths dictated by the standard

10/07/2018 Plastic hoses to connect gas utilities Plastic hoses for gas with a textile reinforcement to withstand internal pressure.

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