A pipeline telescopic joint configured to compensate for dimensional changes has: a first pipe section having a first diameter; a second pipe section having a second diameter smaller than the first diameter is slidingly coupled to the first pipe section; an end assembly, which is fixed to the second pipe section an annular seat bounded by two facing cylindrical faces; and an annular gasket, which is housed within the annular seat and has a polymeric casing and a spring housed within the polymeric casing, wherein the polymeric casing is in contact with the cylindrical faces.