Overview
ISO 18672-1:2009 defines the specifications and requirements for plastics piping systems intended for non-pressure drainage and sewerage applications, specifically focusing on pipes and fittings made of polyester resin concrete (PRC) with flexible joints. Developed by the International Organization for Standardization (ISO), this standard addresses materials, design, performance, and test methods for PRC pipes and fittings used in buried installations-such as open-trench construction and pipe jacking. The standard covers a wide range of nominal sizes and cross-sectional shapes, making it relevant for large infrastructure projects involving non-pressure utilities.
Key Topics
- Material Requirements: Specifies the use of polyester resin concrete combining mineral aggregates and polyester resin, with strict controls on composition, aggregate size, appearance, and minimum resin content.
- Product Classification: Details on classification by installation method (open-trench "O" or trenchless "T") and bore shape (circular "C", egg-shaped "E", or kite-shaped "K").
- Geometrical Characteristics: Outlines dimensions, tolerances, and form requirements for pipes and fittings, including specific tolerances for roundness, straightness, wall thickness, and marking.
- Joint Flexibility: Includes criteria for flexible joints, angular deflection, misalignment, and draw to ensure leaktightness and accommodate movement during installation and operation.
- Testing and Performance: Describes required test methods for mechanical (crushing strength, ring bending tensile strength, longitudinal bending resistance) and chemical properties, including test conditions and the use of reference standards.
- Marking and Identification: Mandates clear marking of pipes and fittings for traceability and compliance, facilitating inspection and quality control on site.
Applications
Installed primarily in underground drainage and sewerage networks, PRC piping systems specified by ISO 18672-1:2009 are suitable for:
- Municipal Drainage Systems: Conveyance of surface water, rainwater, and municipal sewage at temperatures up to 50°C, without pressure or with occasional low-pressure surges up to 0.5 bar.
- Buried Infrastructure: Use in applications where durable, corrosion-resistant, and load-bearing pipe material is required for installation by open-trench or pipe jacking methods.
- Areas Subject to Vehicle and Pedestrian Traffic: PRC pipes offer high mechanical strength and stability, essential for buried installations subjected to external loads.
The wide range of available nominal sizes and flexible joint designs allows for customization to meet specific engineering, hydraulic, and installation requirements.
Related Standards
ISO 18672-1:2009 references or aligns with several internationally recognized standards for testing, materials, and installation of plastics piping systems, including but not limited to:
- ISO 3126: Plastics piping systems - Determination of dimensions
- ISO 75-2: Plastics - Determination of temperature of deflection under load
- ISO 7510: Plastics piping systems - GRP components - Determination of constituents
- ISO 8639: GRP pipes and fittings - Test methods for leaktightness of flexible joints
- ISO 10928: GRP pipes and fittings - Regression analysis methods
- EN 681-1: Elastomeric seals for pipe joint seals - Material requirements for vulcanized rubber
These related standards provide comprehensive guidance on measurement techniques, material properties, and test procedures essential for ensuring compliance and long-term performance of PRC piping systems.
Keywords: ISO 18672-1:2009, polyester resin concrete (PRC) pipes, non-pressure drainage, plastics piping standards, sewerage systems, flexible joints, buried installation, open-trench construction, pipe jacking, piping system compliance