Download or read book GB T 30020 2023 Translated English of Chinese Standard GB T 30020 2023 GBT30020 2023 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2023-09-13 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document describes the testing principle, devices, steps, records and reports of determining glass defects through the photoelastic scanning method. This document is applicable to the testing of defects that cause stress concentration in transparent glass and its products, and provides a reference for assessing the possible self explosion risk of tempered glass in service.