ANNEX IIESSENTIAL HEALTH AND SAFETY REQUIREMENTS RELATING TO THE DESIGN AND CONSTRUCTION OF EQUIPMENT AND PROTECTIVE SYSTEMS INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES
2.Supplementary requirements in respect of equipment
2.2.Requirements applicable to equipment category 2 of equipment-group II
2.2.1.Explosive atmospheres caused by gases, vapours or mists
2.2.1.2.
Equipment parts must be so designed and constructed that their stated surface temperatures are not exceeded, even in the case of risks arising from abnormal situations anticipated by the manufacturer.