This document specifies methods for determining the initial ring stiffness of glass-reinforced thermosetting plastics (GRP) pipes. Two methods are given (constant load and constant deflection), and within the specified deflection limits, each is equally valid and can be used for any diameter.
PROJECT
naSRPS EN ISO 7685:2026
40.20
DIS ballot initiated: 12 weeks
Oct 29, 2026
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