GB/T 32378-2015 (English Version) PDF

Standard No.: GB/T 32378-2015
Language: Chinese, Available in English version
Release Date: 2016
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 32378-2015

Scope: This standard stipulates that the extrapolation method is used to determine the long-term ultimate bending strain and long-term ultimate relative ring deformation of glass fiber reinforced thermosetting plastic (CGRP) pipes in a wet environment. This standard gives two loading methods: one is the loading plate, and the other is the supporting beam. Note: ———When the relative radial deformation of the test is not greater than 28°, both loading methods can be used; when the relative radial deformation of the test is greater than 28°, at least one supporting beam is used for loading. This standard applies to thin-walled glass fiber reinforced thermosetting resin pipes and fittings. Note: Thin-walled pipe means that the ratio of outer diameter to wall thickness is greater than or equal to 10:1. This condition limits the internal pressure of the pipe. According to the hoop stress equation, the design internal pressure of the pipe is roughly equal to the hydrostatic pressure design basis. 20%%, and has nothing to do with the diameter.

GB/T 32378-2015 Referenced Document

ISO 10928:1997 Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes and fittings - Methods for regression analysis and their use
ISO 7685 Glass-reinforced thermosetting plastics (GRP) pipes — Determination of initial ring stiffness*， 2019-07-11 Update

2016 GB/T 32378-2015 Determination of long-term ultimate bending strain and long-term ultimate relative ring deformation of glass fiber reinforced thermosetting plastic (GRP) pipes in a wet environment