Sealed tubular joint with plastic expansion and at least one inclined surface

An expandable tubular joint, comprising:

• a first tubular male element, comprising a first male threading and a ring shaped lip having a first axial stop surface at a free end of the first element;
• and
• a second tubular female element comprising a second female threading, matching the first threading, and a receiving element matching the male lip, having a second axial stop surface,
• the first threading being configured to be screwed into the second threading to bring
• the two stop surfaces into mutual contact, and a peripheral surface of the receiving element radially facing inwards, the female element comprising a first inclined shoulder facing towards the second axial stop surface, and a peripheral surface of the first tubular male element radially facing outwards and comprising a second inclined shoulder,
• a peripheral surface of the receiving element radially facing inwards comprising a ring shaped channel with a concave arc profile that presents a first flank axially facing towards said axial stop surfaces and a second flank axially facing in an opposite direction to said axial stop surfaces,
• the inclined shoulder fitting of the receiving element being defined by said first flank,
• the concave channel impressing a corresponding convex shape on the peripheral surface of the male lip during expansion,
• wherein, upon expansion of the joint, the inclined shoulders and said corresponding convex shape are at least locally in sealed mutual contact with radial interference.