11 Containers and reactors, in the form of industrial furnaces, in particular pressure vessels and high-pressure reactors for polymerisation reactions, in particular for producing polyethylene, for generating synthesis gas, for reforming processes, for synthesising ammonia and urea, for hydrogenation and dehydrogenation processes, for oxidation processes, in particular for producing nitric acid, for processing oil and gas flows, for gas purification, in particular for denitrification of process and exhaust gases, for biological processes, in particular fermentation processes, for high-pressure extraction and pasteurisation in the food and pharmaceutical industries, tubular reactors and autoclaves, pressure vessels for water jet cutting; apparatus and devices in the form of carbonizing furnaces for processing hydrocarbons, in particular for hydrogenation and dehydrogenation of hydrocarbons, in particular alkanes, and installations composed thereof; sterilisers, in particular high pressure sterilising installations; refrigerators, in particular coolers; water heaters; burners and furnaces to produce gas, for heat regenerators and for steam generating apparatus in the form of parts for gasification installations, in particular in the form of parts for installations for producing chemical substances, predominantly synthesis gas, namely, furnaces for gas, heat and steam production; gas purification machines and installations composed thereof and structural parts and components, for breaking down environmentally harmful nitrogen compounds in exhaust gases, in particular for reducing and/or removing nitrogen oxides (NOx), in particular for combined breaking down of nitrogen oxides (NOx) and dinitrogen oxide (N20), namely, by means of catalytic chemical decomposition of nitrogen oxides (NOx) and/or dinitrogen oxide (N20), in particular using ammonia (NH3), hydrogen (1-12), hydrocarbons, carbon monoxide or mixtures thereof as reducing agents; shell and tube heat exchangers; heat exchangers, other than machine parts, in particular multi tube heat exchangers, double tube heat exchangers; autoclaves for sterilization, in particular with agitators; heat exchangers for chemical processing, in particular fin tube heat exchangers, apparatus for heating, cooling, drying and reacting chemicals; immersion heaters; electric fluidised bed dryers and electric fluidised bed coolers; vibrating electric plate dryers and vibrating electric plate coolers; cyclone dryers for industrial purposes to heat and dehumidify; degassers for physical degassing of substances, in particular trickling degassers and spray degassers, degassers using membrane contactors for removing gases from liquids, namely, liquid purification units; degassers for chemical degassing of oxygen using chemicals, namely, air purification units; converter inserts, namely, gas generating furnaces synthesis gas converters in the field of catalysts and reactors for generating synthesis gas, in particular for generating ammonia; electric vibratory coolers with a vibration exciter, for cooling by means of increased heat exchange through vibrations, in particular for cooling bulk goods; polyethylene reactors in the form of gas generating furnaces for producing polyethylene from ethylene by means of high pressure or low pressure processes, incorporating a reactor vessel, a catalytic converter and a compressor, in particular for low pressure polymerisation by means of a suspension process carried out in the reactor vessel or by means of a solution process carried out in the reactor vessel or by means of a gas phase process carried out in a fluidised bed reactor