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This document specifies the properties of the piping system and its components made from glass-reinforced thermosetting plastics (GRP) based on unsaturated polyester (UP) resin. It is suited for all types of water supply, drainage and sewerage with or without pressure. Types of water supply include, but are not limited to, raw water, irrigation, cooling water, potable water, salt water, sea water, penstocks in power plants, processing plants and other water-based applications. This document is applicable to GRP-UP piping systems, with flexible joints, intended to be installed using jacking techniques. It specifies the characteristics of pipes made from GRP-UP, with or without aggregates or fillers. It also specifies the test parameters for the test methods referred to in this document. This document is applicable to circular pipes and joints with a size range from DN 100 to DN 4 000 at normal service conditions. This document covers requirements to demonstrate the adequacy of the design of the joint and specifies type test performance requirements for the joints as a function of the declared nominal pressure rating of the pipeline system and the required joint deflection capability of the system. The determination of longitudinal compressive properties of a pipe are given in Annex A and Annex B. The procedure for the calculation of the design jacking load on a GRP (UP) pipe is given in Annex C. Requirements for GRP-fittings, used between pipe systems covered by this document, are given in ISO 23856.