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

certifying bodies and builders of applications who must base their work on the knowledge libraries laid down

This also helps in understanding the detailed specification of these potentiometers

when it could be extracted from bibliographic references referring to it

you can properly design a graduated dial scale that describes the refractive error of the eye or the refractive effect of a contact or spectacle lens

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