Abstract: The invention relates to shell-and-tube heat exchangers, including those used to cool cracking gas in petroleum refining, containing wear resistant tube plate linings. In the heat exchangers, at least a portion of the inlet tube plate is covered by wear-resistant inserts which can be at least partially inserted into the heat exchanger tubes.

Abstract: A storage container for water-endangering liquids comprises a leakage detection and restraint system. The storage container provides a container that allows for a short-notice alarm system and that minimizes the collection volume, that is to ensure that the water-endangering liquid spreads as little as possible, as well as to reduce construction and maintenance costs. The storage container is characterized by the following features: a gutter (4) surrounding the tank (13) that is directly contiguous with the outer wall (2) of the storage container and that collects leaked liquid, at least one gutter outlet (14), at least one liquid collection container (6), and at least one detection system (12) for the water-endangering liquids. The gutter outlet (14) is adapted to guide the liquid collected in the gutter (4) to the liquid collection container (6) that is provided with the detection system (12).

Abstract: The invention relates to shell-and-tube heat exchangers, including those used to cool cracking gas in petroleum refining, containing wear resistant tube plate linings. In the heat exchangers, at least a portion of the inlet tube plate is covered by wear-resistant inserts which can be at least partially inserted into the heat exchanger tubes.

Abstract: The invention relates to a storage container for water-endangering liquids that comprises a leakage detection and restraint system. The aim of the invention is to provide a container that allows for a short-notice alarm system and that minimizes the collection volume, that is to ensure that the water-endangering liquid spreads as little as possible, as well as to reduce construction and maintenance costs. To this end, the storage container is characterized by the following features: a gutter (4) surrounding the tank (13) that is directly contiguous with the outer wall (2) of the storage container and that collects leaked liquid, at least one gutter outlet (14), at least one liquid collection container (6), and at least one detection system (12) for the water-endangering liquids. The gutter outlet (14) is adapted to guide the liquid collected in the gutter (4) to the liquid collection container (6) that is provided with the detection system (12).

Abstract: A storage container for water-endangering liquids that includes a leakage detection and restraint system. The container allows for a short-notice alarm system and minimizes the collection volume, to ensure that the water-endangering liquid spreads as little as possible, as well as to reduce construction and maintenance costs. To this end, the storage container features a gutter surrounding the tank that is directly contiguous with the outer wall of the storage container and that collects leaked liquid, at least one gutter outlet at least one liquid collection container, and at least one detection system for the water-endangering liquids. The gutter outlet is adapted to guide the liquid collected in the gutter to the liquid collection container that is provided with the detection system.

Abstract: The invention relates to a method for welding shaped bodies of carburized heat-resistant austenitic steel. The inventive method is characterized in that carburized steel parts to be welded are preheated to temperatures of 700 to 900 degrees Celsius before welding, and the preheated carburized steel parts are welded with current intensities of 50 to 200 A.

Abstract: A process for cutting coked metal includes cutting with a flame or by electrowelding after the coked metal has been heated sufficiently to relieve stresses in the metal.

Abstract: Described is a heat exchanger comprising a nest of heat-exchange tubes held between two end plates, the heat exchanger being designed for connection downstream of a thermal-cracking installation. In order to reduce erosion of the base plate, the plate at the input end is coated on the side facing the oncoming gas with an erosion-resistant, fireproof coating of a chemically bound compound, leaving clear the apertures for the heat-exchange tubes.