Explosion-proof stainless steel finned-tube Heaters type ERB has rolled-in ribs, similar to the standard finned-tube heaters. The heating element is composed of stacked stones. The Sinus explosion-proof finned tube heaters are ISSeP approved and comply with the norms laid down in the European Norms (European Standards) EN-IEC-60079-1. The pressure-resistant construction is approved for gas groups I, IIA, IIB and IIC.