BS EN ISO 11295:2017 pdf download.Classification and information on design and applications of plastics piping systems used for renovation and replacement
1 Scope
This document defines and describes families of techniques for the renovation and trenchless replacement (on or off the line of an existing pipeline) of non-pressure and pressure pipelines through the use of plastics pipes, including plastics composites formed in situ into pipes, fittings and ancillary components. It does not include new construction provided as network extension. For each technique family, it identifies areas of application including, but not limited to, underground drainage and sewerage, and underground water and gas supply networks.
This document provides information on the principles of, but not the detailed methodologies for, the design of plastics piping systems used for renovation or trenchless replacement of existing pipelines,covering:
— existing pipeline and site conditions;
— functions of the new pipeline;
— structural performance;
— hydraulic performance;
— installation aspects and site impact;
— other factors affecting renovation or trenchless replacement technique selection.
Necessary work on the existing pipeline prior to renovation and/or trenchless replacement is outside the scope of this document. This document provides information needed to determine viable options and for identification of the optimal technique with regard to a given set of rehabilitation objectives. NOTE It is the responsibility of the designer to choose and design the renovation or trenchless replacement system. It does not specify the calculation methods to determine, for each viable technique, the required amount of lining or replacement pipe material needed to secure the desired performance of the rehabilitated pipeline.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special characteristics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1043-1 and the following apply.
3.1 General
3.1.1 rehabilitation
measures for restoring or upgrading the performance of existing pipeline systems, including renovation (3.1.2), repair (3.1.3) and replacement (3.1.4)
3.1.2 renovation
work incorporating all or part of the original fabric of the pipeline, by means of which its current performance is improved
3.1.3 repair
rectification of local damage
3.1.4 replacement
construction of a new pipeline, on or off the line of an existing pipeline, where the function of the new pipeline system incorporates that of the old
3.1.5 network extension
new construction off the line of a pipeline or a network with the aim to expand the total capacity of the network
3.1.6 trenchless replacement
replacement (3.1.4) without opening trenches other than small excavations to provide access for the particular technique
BS EN ISO 11295:2017 pdf download
