Vitreous and porcelain enamels. Determination of crack formation temperature in the thermal shock testing of enamels for the chemical industry subscription-only ISO 21925‑1 is part one

ISO 21925‑1 is part one of a multi-series of international standards on fire resistance tests which covers fire dampers for air distribution systems

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1   This standard deals with power operated temporarily installed builders hoists intended for use by persons who are permitted to enter sites of engineering and construction

This document gives the definitions of terms used in the field of computed tomography (CT)

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Vitreous and porcelain enamels. Determination of crack formation temperature in the thermal shock testing of enamels for the chemical industry subscription-only ISO 21925‑1 is part one1 Scope This International Standard specifies a test method for the determination of the crack formation temperature of enamels for the chemical industry by subjecting enamelled steel specimens to thermal shock using cold water. The value of the crack formation temperature measured according to this test method is not valid for the finished component (see annex A). It is a parameter of vitreous and porcelain enamels for comparing the relative quality