What is ISO 11298-4 about?
ISO 11298-4 is the fourth part of a multi-series of documents. ISO 11298-4 is applicable to plastics piping systems for renovation of underground water supply networks that specifies requirements and test methods for cured-in-place pipes (CIPP) and fittings used for the renovation of water supply networks, which transport water intended for human consumption, including raw water intake pipelines.
ISO 11298-4 applies to independent (fully structural, class A) and interactive (semi-structural, class B) pressure pipelines, as defined in ISO 11295, which do not rely on adhesion to the existing pipeline.
ISO 11298-4 applies to the use of various thermosetting resin systems, in combination with compatible fibrous carrier materials, reinforcement, and other process-related plastics components.
ISO 11298-4 is applicable to cured-in-place pipe lining systems intended to be used at a service temperature of up to 25 °C.
Note 1: ISO 11298-4 not include requirements or test methods for resistance to cyclic loading or the pressure rating of CIPP liners that were passing through bends, which are outside the scope of this document.
Who is ISO 11298-4 for?
ISO 11298-4 on renovation of underground water supply networks is relevant to:
- Manufacturers of CIPPs and fittings used in plastic piping systems
- Designers of CIPP
- Installers
- Civil engineers
- Contractors
- Renovation and maintenance personnel
- Public authorities
Why should you use ISO 11298-4?
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.
The requirements and test methods under ISO 11298-4 will help you assess and evaluate material, physical, mechanical and geometrical characteristics of lining with the specified pipes and fittings.
The resin system and carrier material are essential features of the finished pipe. The carrier material generally affects the properties of the composite, e.g. by either increasing or decreasing mechanical resistance. In this regard, ISO 11298-4 provides specific component functions as well as possible end product (“I” stage) functions such as leak tightness, stiffness, strength, hydraulic smoothness and chemical resistance. The other components can be present, depending on the specific CIPP lining technique used.
ISO 11298-4 also specifies a method for determining the long-term flexural modulus of CIPP material subjected to constant flexural stress under dry or wet conditions.
With compliance to ISO 11298-4, as a manufacturer of CIPP, you will be able to deliver high- quality pipes for easy and quick in-situ rehabilitation of underground water supply networks. Moreover, ensuring the process for lining with CIPPs is standardized, will enhance the reliability and credibility of your products.
