Abstract: A method of joining a tubular member and a pipeline configured to convey corrosive products comprises preparing a tubular member with an inner seat; inserting the end of a pipeline inside the inner seat; inserting a sleeve of corrosion-resistant material inside the end of the pipeline; inserting an expandable mandrel inside the sleeve; and expanding the expandable mandrel to join the end of the pipeline and the tubular member, and seal the sleeve and the pipeline to protect parts of the pipeline, sensitive to corrosive products, via the sleeve.

Abstract: A joining device configured to join two facing and aligned pipeline sections presents two coupling members selectively couplable to respective pipeline sections at two respective facing flanges located at the ends of respective pipeline sections; a pulling mechanism suitable to move the coupling members towards each other in abutment against the flanges and to temporarily tighten the flanges by moving the coupling members towards each other; and a tightening mechanism suitable to definitively tighten the coupling members while the pulling mechanism keeps the flanges tight.

Abstract: A joining device configured to join two facing and aligned pipeline sections presents two coupling members selectively couplable to respective pipeline sections at two respective facing flanges located at the ends of respective pipeline sections; a pulling mechanism suitable to move the coupling members towards each other in abutment against the flanges and to temporarily tighten the flanges by moving the coupling members towards each other; and a tightening mechanism suitable to definitively tighten the coupling members while the pulling mechanism keeps the flanges tight.

Abstract: A method of joining a tubular member and a pipeline configured to convey corrosive products comprises preparing a tubular member with an inner seat inserting the end of a pipeline inside the inner seat; inserting a sleeve of corrosion-resistant material inside the end of the pipeline; inserting an expandable mandrel inside the sleeve; and expanding the expandable mandrel to join the end of the pipeline and the tubular member, and seal the sleeve and the pipeline to protect parts of the pipeline, sensitive to corrosive products, via the sleeve.

Abstract: A method of joining two portions of an underwater pipeline for conducting fluid and/or gas on the bed of a body of water, the method including the steps of: joining a telescopic sleeve, having a first coupling head, to a first end of a first pipeline portion above the body of water; positioning the first end, the telescopic sleeve, and the first coupling head in a first given position on the bed of the body of water; joining a second coupling head to a second end of a second pipeline portion above the body of water; positioning the second end and the second coupling head in a second given position, close to the first coupling head, below the body of water; and connecting the first and second coupling head hermetically below the body of water.

Abstract: A method of joining two portions of an underwater pipeline for conducting fluid and/or gas on the bed of a body of water, the method including the steps of: joining a telescopic sleeve, having a first coupling head, to a first end of a first pipeline portion above the body of water; positioning the first end, the telescopic sleeve, and the first coupling head in a first given position on the bed of the body of water; joining a second coupling head to a second end of a second pipeline portion above the body of water; positioning the second end and the second coupling head in a second given position, close to the first coupling head, below the body of water; and connecting the first and second coupling head hermetically below the body of water.