EN ISO 15874 Plastic Pipe Systems for Hot and Cold Water Installations - Polypropylene (PP)

The “EN ISO 15874 Plastic piping systems for hot and cold water installations - Polypropylene (PP)” standard, developed by the International Organization for Standardization (ISO) and later published as a European standard within the scope of harmonization efforts, consists of the following sub-sections published under the same title:

The standard “EN ISO 15874-1 Part 1: General” describes the general aspects of polypropylene (PP) pipe systems designed for use in hot and cold water installations in buildings, for the transport of water (residential systems) and for heating systems, whether for human consumption or not, under design pressures and temperatures according to application class.

This standard covers various service conditions (application classes), design pressures, and pipe size classes.

Making appropriate choices in these respects is the responsibility of the buyer or the specification preparer. These choices should take into account their specific requirements and relevant national regulations and installation practices or codes.

This standard also specifies the test parameters for the referenced test methods. Together with other parts of this standard, it applies to PP pipes, fittings, connections, and other plastic and non-plastic components designed for use in hot and cold water installations.

This standard focuses on general aspects of PP pipe systems. It defines the following:

General system requirements for pipes, fittings, joints and connections (including hybrid connections with other plastic or non-plastic materials).
Classification of applications according to design pressures, temperatures, and service conditions (e.g., different classes for cold water, hot water, radiator connections, and underfloor heating).
Reference to material quality, long-term performance expectations (such as resistance to internal pressure over time), and suitability for drinking water where applicable.
The standard “EN ISO 15874-2 Part 2: Pipes” describes the requirements for polypropylene (PP) pipes designed for use in piping systems in buildings for hot and cold water installations, for the transport of water (residential systems) whether or not for human consumption, and for heating systems under operating pressures and temperatures appropriate to the application class.

This standard covers a range of service conditions (application classes), design pressures, and pipe size classes. It is the responsibility of the buyer or specification preparer to make appropriate selections from these considerations. These selections should take into account their specific requirements and relevant national regulations and installation practices or codes.

This standard also specifies the test parameters for the specified test methods.

This standard, together with other parts of this standard, is applicable to PP pipes, their fittings, and fittings with components made of PP, other plastics, and non-plastic materials, designed for use in hot and cold water installations.

This standard is also applicable to pipes with or without a barrier layer. In plastic pipes equipped with a thin barrier layer, for example to prevent or significantly reduce the diffusion of gases and the passage of light through or across the pipe wall, the design stress requirements are fully met by the base polymer (PP).

This standard specifies the requirements for PP pipes designed for the following purposes (including those with or without barrier layers, such as oxygen diffusion barriers for heating systems):

Hot and cold water supply (for domestic use, potable or non-potable water).
Heating systems (e.g., radiator connections, underfloor heating).
Operation at pressures and temperatures conforming to the application classes defined in ISO 15874-1 standard.

This standard ensures that these pipes are suitable for long-term use (typically a 50-year design life) under the cyclic pressure, thermal expansion, and chemical exposure typical of plumbing systems.

The standard “EN ISO 15874-3 Part 3: Fittings” describes the specifications of fittings for polypropylene (PP) pipe systems used for water transmission in hot and cold water installations in buildings. These systems are designed for heating systems, whether for human consumption (residential systems) or not, and under design pressures and temperatures according to their application class.

This standard covers various service conditions (application classes) and design pressure classes. It is the responsibility of the buyer or specification preparer to make the appropriate selections from these considerations. These selections should take into account their specific requirements and relevant national regulations and installation practices or codes.

This standard also specifies the parameters of the indicated test methods.

This standard, along with other parts of this standard, applies to fittings made of PP and other materials designed for installation in hot and cold water systems conforming to ISO 15874-2. These fittings comply with the requirements of ISO 15874-5.

This standard applies to the following types of fittings:

Socketed fusion fittings
Electrofusion fittings
Mechanical fasteners
Connectors with integrated inserts.

This standard also applies to fittings made from alternative materials that, when fitted to pipes conforming to ISO 15874-2, comply with the requirements of ISO 15874-5.

This standard specifies the requirements for PP fittings and fittings made from other materials designed for use with PP pipes in the following applications:

Hot and cold domestic water supply (potable or non-potable).
Heating systems (e.g., radiator connections, underfloor heating).
Applications that comply with the service classes and design requirements specified in the ISO 15874-1 standard.

Fittings must provide long-term durability (typically a 50-year design life), resistance to internal pressure, thermal cycling, and chemical exposure typical of piping systems.

The standard “EN ISO 15874-5 Part 5: System suitability for purpose” describes the suitability characteristics of polypropylene (PP) pipe systems designed for water transmission in hot and cold water installations in buildings, whether for human consumption or not (residential systems), and in heating systems, under design pressures and temperatures according to their application class.

This standard covers a range of service conditions (application classes) and design pressure classes. It is the responsibility of the buyer or specification preparer to make the appropriate selections from these considerations. These selections should take into account their specific requirements and relevant national regulations and installation practices or codes.

This standard also includes the test parameters for the test methods specified herein.

This standard, together with other parts of this standard, is applicable to PP pipes, fittings, connections and their connections to other plastic and non-plastic components designed for use in hot and cold water installations.

This standard specifies system-level performance requirements for PP tubing systems (including socket welding, electrofusion, and mechanical connections) used for the following purposes:

Transport of hot and cold water (domestic, potable or non-potable).
Heating systems (such as radiators and underfloor heating).
Applications that comply with the design classes and pressure/temperature conditions specified in the ISO 15874-1 standard.

This standard focuses on demonstrating that the entire system (not just isolated components) can withstand 50-year design life expectations against combined stresses such as pressure fluctuations, thermal expansion/contraction, bending, tensile forces, and cyclic loading.

The standard “EN ISO 15874-7 Part 7: Guidance on conformity assessment” describes the requirements for establishing procedures for assessing and certifying the conformity of compounds, products, and assemblies to the relevant sections of this standard, which are intended to be included in the quality plan as part of the manufacturer's quality management system. A basic test matrix is provided in the annex to this standard (Annex A).

This standard, together with other parts of this standard, applies to polypropylene (PP) pipe systems designed for use in hot and cold water installations in buildings for water transmission (residential systems), whether for human consumption or not, and in heating systems at design pressures and temperatures appropriate to the application class.

This standard applies to PP pipe systems for the following purposes:

Supply of hot and cold domestic water (potable or non-potable).
Heating systems in buildings.
Compliance with the requirements of other parts of this standard.

For many years, our organization, with its competent and experienced staff, has been understanding the needs of its clients, providing the advanced testing services they require, and assisting them in the establishment, implementation, and improvement of management systems. Within this framework, we also provide testing services in accordance with the EN ISO 15874 standard.