This part of ISO 28721 specifies requirements for the thermal shock resistance of, and heating and cooling
procedures for, glass-lined apparatus, components, accessories and pipes primarily used for process
equipment in chemical plants.
It specifies the limits of thermal shock resistance using diagrams (see Figure 1 and Figure 2). For glass-lined
steel, a distinction is made between a thermal shock on the glass-lined side (produced by charging an
apparatus) and a thermal shock on the steel side (produced by heating or cooling an apparatus).
This part of ISO 28721 applies to operating temperatures from ? 25 °C to + 230 °C.
It is only applicable to enamelled unalloyed and low-alloy carbon steels.
BS EN ISO 28721-3:2011 history
2011BS EN ISO 28721-3:2011 Vitreous and porcelain enamels. Glass-lined apparatus for process plants. Thermal shock resistance
2006BS EN 15159-3:2006 Vitreous and porcelain enamels. Glass-lined apparatus for process plants. Thermal shock resistance