This part of UNE 53008 specifies the practice that must be followed in the design, installation and maintenance of a multilayer pipe channeling system in accordance with the UNE 53008 1 Standard for gas receiving facilities supplied at a maximum operating pressure. (MOP) less than or equal to 5 bar. This part of UNE 53008 is subject to what is indicated in the current regulations applicable to gas receiving installations and in the corresponding chapters of UNE 60670 3, UNE 60670 4 and UNE 60670 8, whose provisions prevail over those of this rule. This document is prepared in order to complement and apply jointly with said regulations. NOTE The regulations in force at the time of preparation of this standard are the Technical Regulations for the distribution and use of gaseous fuels, approved by RD 919/2006 and its subsequent modifications.