ISO 18225:2012

Standard
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Norwegian title: Plastics piping systems — Multilayer piping systems for outdoor gas installations — Specifications for systems
English title: Plastics piping systems — Multilayer piping systems for outdoor gas installations — Specifications for systems
Item type: Standard
Language: Engelsk
Edition: 2 (2012-11-27)
Supersedes: ISO 18225:2007 Alert Withdrawn
Number of pages: 17
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Scope: <p>This International Standard specifies general and performance requirements for multilayer pipe systems based on pipes made from thermoplastics and intended to be used for gas supply outdoors.</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 <xref ref-type="app" rid="sec_A">Annex A</xref>. The outer layers of metal multilayer pipes must be of either PE or PE-X.</p><non-normative-note><label>NOTE</label><p>For the purposes of this International Standard, PE-RT is considered as PE, while PE-X and adhesive layers are considered as thermoplastics materials.</p></non-normative-note><p>This International Standard 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 <std std-id="iso:std:iso:13623:en" type="undated"><std-ref>ISO 13623</std-ref></std>).</p>
Committee: SN/K 084
Adopted: 2012-11-27
ICS: 23.040.20 - Plastrør
23.040.45 - Rørdeler av plast
75.200 - Utstyr til håndtering av petroleumsprodukter og naturgass