Made with WATROD or FIREBAR® tubular elements brazed or welded to flange, tubular flange heaters are available with enclosure and flange carrying 239°F rating for IECEx 'e' certification. These ratings can eliminate need for additional convective cooling features, additional insulation features, and sun shade, while IECEx 'e' certification indicates increased safety protection. Units heat liquids and gases in tanks, pressure vessels, and vaporizers for applications from 40–4,000 kW.