This document gives guidance for equipment for use in explosive atmospheres for ambient temperature conditions below -20 °C and other additional severe conditions, including offshore applications. This document provides recommendations for the design, manufacture and use of this type of equipment. This document applies to equipment operating within the environmental conditions specified in the explosion-proof certificate. Note: See GB/T 4796, GB/T 4797 (all parts), GB/T 4798 (all parts) and GB/T 2421 for climatic condition classification. This document is used together with other relevant parts of GB/T 3836.