An explosion occurred in the exhaust line to the scrubber during a cleaning procedure with concentrated nitric acid in a chemical reactor. Previously the reactor was treated with methanol under reflux and afterwards rinsed with drinking water. The detonation destroyed completely a section of a PN 16 condensate pipe after a flame arrestor. https://safeersappliancers.shop/product-category/bosch-mbs533bw0b-electric-double-oven-white/