Pipe Joint Structure

A pipe joint structure having a pipe joint, and the pipe joint comprising:

• a body including a hollow channel defined therein, a connecting tube surrounding around the hollow channel and having at least one end which is open, and a coupling section arranged adjacent to an end portion of an outer wall of the connecting tube;
• a connection ring including an inner joining diameter for connecting with the coupling section of the body;
• a screwing nut including an internal orifice defined therein, wherein an outer diameter of the internal orifice is greater than the body and the connection ring, and the internal orifice has inner threads formed around inner wall thereof and has a limiting rib arranged on one end of the internal orifice facing to the body, wherein an outer diameter of the internal orifice is greater than an outer diameter of the body and is smaller than an outer diameter of the connection ring;
• hence the limiting rib of the internal orifice of the screwing nut is inserted into the connecting tube of the body, the inner joining diameter of the connection ring connects with the coupling section of the body, and the connection ring stops the limiting rib of the screwing nut, such that the screwing nut rotates on the connecting tube fixedly, hence after the connection ring is in connection with the body, on an outer surface of the body forms a fixing line which is welded to form a welding line.