Connection element

A connection element comprising:

• a tubular first part with a first ring-shaped connection face for connection with an austenitic steel pipe and a tubular second part with a second ring-shaped connection face for connection with a first ferritic steel pipe;
• wherein the tubular first part is of an austenitic steel material and wherein the tubular second part is of a ferritic steel material;
• wherein the tubular first and second parts are in one-piece and formed such that a passage between the first and second ring-shaped connection faces is formed;
• and
• wherein the tubular first and second parts are produced by an additive manufacturing process,
• wherein the tubular second part has a third ring-shaped connection face for connection with a second ferritic steel pipe,
• wherein the third ring-shaped connection face is arranged concentrically with the second ring-shaped connection face, as seen in a length direction,
• wherein a cooling channel extending along a circumference is formed in the tubular first part.