Abstract: A waste bin including an upper opening for the depositing of waste into an internal compartment for containment is provided. The opening is delimited by at least one respective closing door leaf. The bin includes at least one control unit for commanding respective sensors and operative assemblies, at least one battery for powering the control unit and the circuits controlled by it, and at least one converter for converting mechanical energy into electrical energy which has output terminals connected to the battery for its recharging. The movement of at least a portion of the bin, for use, emptying and maintenance, causes the activation of the converter and the recharging of the at least one battery.

Abstract: A method for joining fluid carrying steel pipes together including the following steps. Identifying a subject pipe section to be replaced and intercepting the fluid flow by fastening stoppers inside of pipe portions upstream and downstream from the subject pipe section. Removing the subject pipe section, leaving in place upstream and downstream pipe portions. Inserting along each of the first and second pipe portions a protective stopper and chamfering the edges of those pipe portions and then mounting first and second sliding sleeves with sealing rings thereover. Removing the protective stoppers from the pipe portions and positioning between those pipe portions a new connection piece. Displacing the first and second sliding sleeves onto the connection piece so that sealing rings are arranged on the connection piece and fixing the sliding sleeves to the pipe portions and to the connection piece.