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ISO 4152:2021

Glass‐reinforced thermosetting plastics (GRP) pipes — Determination of the apparent axial long‐term modulus of pipes subject to beam bending

May 19, 2021

General information

90.20     Apr 15, 2026

ISO

ISO/TC 138/SC 6

International Standard

23.040.20  

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Scope

This document specifies a method for determining the apparent axial long-term modulus of pipes subject to beam bending deflection between vertically supported end-couplers, which allow rotation of the pipe relative to the couplers.
In conjunction with ISO 10928, this document expresses the results of the test as an apparent axial long-term modulus for use in the calculation of mid-span beam deflection and end rotation of GRP pipes as specified in ISO/TS 10986.
Test conditions and requirements are specified in the referring standard.
For practical reasons, the test method is not suited for diameters greater than DN 600.

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PUBLISHED
ISO 4152:2021
90.20 Standard under periodical review
Apr 15, 2026

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