Glass-reinforced thermosetting plastics (GRP) pipes -- Determination of the long-term specific ring relaxation stiffness under wet conditions and calculation of the wet relaxation factor
ISO 14828:2003 specifies a method for determining both the long-term specific ring relaxation stiffness and the wet relaxation factor for glass-reinforced thermosetting plastics (GRP) pipes.
A standard is reviewed every 5 years
Revisions / Corrigenda
ISO 14828:2003/Amd 1:2010