Overview
ISO/TR 10465-2:2007 is a Technical Report that compares the two principal static calculation procedures used for the underground installation of flexible glass‑reinforced pipes based on unsaturated polyester resin (GRP‑UP). Published by ISO in 2007 (second edition), this document provides a clear, high‑level comparison of the ATV‑A 127 and AWWA M‑45 calculation methods to help users understand their similarities, differences and practical implications. It is informative in nature and does not replace the original ATV or AWWA source documents.
Key topics
The report summarizes and contrasts the main elements of static pipe design for GRP‑UP, including:
- Soil‑load distribution and how soil interacts with flexible pipes
- Initial and long‑term soil loads and their influence on pipe stresses
- Traffic loads: treatment and differences between the AWWA and ATV approaches
- Deflection: vertical deflections under various loading and installation conditions
- Circumferential bending strain: calculation approaches in both methods
- Buckling: stability assessment procedures and treatment of elastic vs. inelastic behaviour
- Internal‑pressure effects and combined loading (pressure plus external loads)
- Symbols, abbreviations and parameter definitions used by both methods
Note: ISO/TR 10465-2 offers an overview and comparison rather than exhaustive procedural detail; users should consult ATV‑A 127 and AWWA M‑45 for full calculation rules.
Practical applications
This Technical Report is useful for:
- Design engineers evaluating GRP‑UP pipelines for sewerage, drainage and non‑pressurized or low‑pressure fluid transport
- Consultants and contractors who need to interpret or compare design outputs based on different calculation systems
- Standards and compliance teams deciding which established method best fits project requirements or regional practice
- Educators and reviewers seeking a concise primer on pipe‑soil interaction, deflection, buckling and traffic load effects on GRP pipes
By clarifying differences between the ATV and AWWA methods, ISO/TR 10465‑2 helps practitioners choose and apply static calculation procedures for flexible GRP pipe installations that conform to international product standards.
Related standards
- ISO 10465‑1 - Installation procedures (Technical Specification)
- ISO 10465‑3 - Installation parameters and application limits (Technical Report)
- ATV‑A 127 - Guidelines for static calculations on drainage conduits and pipelines
- AWWA M‑45 - Fiberglass pipe design manual
Keywords: ISO/TR 10465-2:2007, GRP‑UP, glass‑reinforced pipes, underground installation, static calculation methods, ATV‑A 127, AWWA M‑45, pipe‑soil interaction, deflection, buckling, traffic loads.