What is ISO 23856 about?
ISO 23856 specifies the properties of piping system components made from glass-reinforced thermosetting plastics (GRP) based on the unsaturated polyester resin (UP). It is suited for all types of water supply, drainage and sewerage with or without pressure. For the purpose of this document, the term polyester resin (UP) also includes vinyl-ester resins (VE).
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
ISO 23856 is applicable to GRP UP piping systems, with flexible or rigid joints with or without end thrust load-bearing capability, primarily intended for use in directly buried installations.
Note 1: Piping systems conforming to ISO 23856 can also be used for non-buried applications, provided the influence of the environment and the supports are considered in the design of the pipes, fittings and joints.
Note 2: ISO 23856 can also apply for other installations, such as slip-lining rehabilitation of existing pipes.
Note 3: ISO 23856 is applicable to circular pipes, fittings and their joints of nominal sizes from DN 50 to DN 4000, which are intended to be used for the conveyance of water, sewage and drainage at normal service conditions, with or without pressure.
Who is ISO 23856 for?
ISO 23856 on piping system components made from GRP is relevant to:
- Manufacturers of plastic pipes and piping components made from GRP
- Installers
- Civil engineers
- Contractors
- Public authorities
Why should you use ISO 23856?
The primary objective of plastic piping systems is to efficiently regulate underground water delivery networks. Appropriate appliance usage of fittings and pipes is crucial for the efficient functioning of the overall system which minimize health risks and hygiene concerns.
ISO 23856 covers properties of piping system components made from GRP based on UP such as mechanical and geometrical characteristics, dimensions and tolerances, amongst others.
Pipes and fittings are classified according to nominal size (DN), nominal pressure (PN) and joint type. ISO 23856 will provide with the acceptable values.
ISO 23856 specifies techniques for harmonizing design practices and addresses the likelihood of failure as well as possible failure consequences. With GRP systems based on UP, you can be assured of long-lasting performance of overall piping system due to its mechanical strength and temperature-resistant properties. This could ultimately reduce risks and minimize costs.
What’s changed since the last update?
ISO 23856:2021 supersedes BS EN 14364:2013, BS EN 1796:2013, BS ISO 10639:2017 and BS ISO 10467:2018, which are withdrawn. The revised version has taken into account some technical changes with respect to BS EN 14364:2013, BS EN 1796:2013, BS ISO 10639:2017, along with editorial changes throughout.
