ISO/AWI 11301-5

A working group has prepared a draft.

Abstract

This document specifies requirements and test methods for pipes and fittings which are part of piping systems for the rehabilitation by means of renovation and trenchless replacement of underground gas supply networks. It is applicable to unplasticized polyamide (PA-U) pipes, fittings and assemblies, as manufactured and as installed. It is not applicable to the existing pipeline. It is applicable to technique families for renovation: — lining with continuous pipes; — lining with close-fit pipes; and technique families for trenchless replacement: — pipe bursting and pipe extraction; — horizontal directional drilling and impact molding. and intended to be used at an operating temperature of 20 °C as the reference temperature. NOTE For applications operating at constant temperatures greater than 20 °C and up to 40 °C, see ISO 16486-5:2021, Annex C. This document is applicable to: — PA-U solid wall single layered pipes (nominal outside diameter, d n ), including any identification stripes; When used with lining with close-fit lining pipes, the lining pipe is reduced on site to provide a close-fitting independent or interactive pressure pipe liner. NOTE: Paper [13] provides a case study for interactive pressure pipe lining. This document is applicable to jointing by means of butt fusion and electrofusion and to fabricated and injection-moulded fittings and mechanical connections of PA-U. This document is not applicable to push-fit jointed discrete pipes assembled as part of the trenchless installation process.