ISO/TC 138/SC 4
| Projekta Nr. | ISO 18225:2007 |
|---|---|
| Nosaukums | <p>ISO 18225:2007 specifies general and performance requirements for multilayer pipe systems based on pipes made from thermoplastics and intended to be used for gas supply. </p> <p>It gives requirements for the design of pipe systems consisting of multilayer pipes based on thermoplastics and for which at least 60 % of the wall thickness is of a polymeric material. The polymeric material used for stress design layers and all inner layers must be polyethylene (PE) and/or crosslinked polyethylene (PE-X), in accordance with Annex A. The outer layers of metal multilayer pipes must be of either PE or PE-X. </p> <p>NOTE For the purposes of ISO 18225:2007, PE-RT is considered as PE, while (PE‑X) and adhesive layers are considered as thermoplastics materials.</p> <p>ISO 18225:2007 is applicable to systems intended to be operated at temperatures ranging from -20 °C to 40 °C. It is applicable to pipes in these systems having a nominal diameter up to and including 630 mm, and to the supply of gaseous fuels of categories D (natural gas) and E (LPG vapour and natural gas or LPG vapour) (see ISO 13623).</p> |
| Reģistrācijas numurs (WIID) | 44698 |
| Darbības sfēra | <p>ISO 18225:2007 specifies general and performance requirements for multilayer pipe systems based on pipes made from thermoplastics and intended to be used for gas supply. </p> <p>It gives requirements for the design of pipe systems consisting of multilayer pipes based on thermoplastics and for which at least 60 % of the wall thickness is of a polymeric material. The polymeric material used for stress design layers and all inner layers must be polyethylene (PE) and/or crosslinked polyethylene (PE-X), in accordance with Annex A. The outer layers of metal multilayer pipes must be of either PE or PE-X. </p> <p>NOTE For the purposes of ISO 18225:2007, PE-RT is considered as PE, while (PE‑X) and adhesive layers are considered as thermoplastics materials.</p> <p>ISO 18225:2007 is applicable to systems intended to be operated at temperatures ranging from -20 °C to 40 °C. It is applicable to pipes in these systems having a nominal diameter up to and including 630 mm, and to the supply of gaseous fuels of categories D (natural gas) and E (LPG vapour and natural gas or LPG vapour) (see ISO 13623).</p> |
| Statuss | Atcelts |
| ICS grupa | 23.040.20 23.040.45 75.200 |