Threaded tube joint

A threaded tube joint, comprising a male threaded tube member (1) and a female threaded tube member (2) with substantially cylindrical walls, the male member (1) having a toroidal sealing surface (11) placed at its end portion near the threaded portion thereof engaging for sealing purpose, when the male and female members (1, 2) are in the assembled position, a corresponding frusto-conical sealing surface (12) of the female threaded tube member (2) placed near a threaded portion characterised by the fact that the toroidal sealing surface has a radius Rs value comprised in the range between 30 and 75 mm for a tube having an outer diameter (OD) of less than 140 mm and between 30 and 100 mm for a tube having an outer diameter (OD) of more than 140 mm, —wherein the male member (1) has a front end first frusto-conical abutment surface (9) forming a first angle (γ) comprised in a range between −15° and −5° with a plane orthogonal to a longitudinal axis (X) defined by the joint, and wherein the female member (2) has a complementary second frusto-conical abutment surface (10) forming a second angle (γ) of same value as the first angle.