Intake pipe for an internal combustion engine comprising at least two welded shells

An intake pipe for an internal combustion engine, said intake pipe comprising a housing having an inlet and at least one cylinder outlet for combustion air, said housing including a plenum from which at least one intake channel branches off to a respective said outlet for each cylinder of the internal combustion engine, wherein said housing is formed by at least two shells that are welded together at mating joining surfaces which define a joint line between the shells, said joint line having sections with differing inclinations relative to the direction of a joining force applied by a welding tool, and resulting from the average inclination of the joining surfaces in the individual sections, and wherein, at least in a section of the joint line that has the smallest inclination relative to the direction of the joining force, the inclination of the joining surfaces alternately has a greater inclination than the joint line and then a smaller inclination than the joint line.