SU375439A1 - METHOD OF CONNECTING THE END OF THE PIPES WITH NIPPLE - Google Patents

Description

I

Dunnage joints of pipe ends with a flare nipnel but an outer cone are known.

However, in this way, at the point where the pipeline goes to the flared socket adjacent to the nipple, stress occurs due to mechanical vibrations of the pipeline, which lead to fatigue and premature failure of the pipeline.

The aim of the invention is to increase the durability and reliability of the connection.

This is achieved by the fact that according to the proposed method, the pipe section entering into the nipple and adjacent to the planting cone is further flared by an angle smaller than the flare angle of the planting cone itself.

FIG. 1 schematically shows the connection of a pipe with a nipnel according to the proposed method; in fig. 2-1 Nipple with flared pipe for connection.

The method is carried out as follows.

The end of the pipe / flared at an angle equal to the angle of the cone nipple 2. After that, the cylindrical section 3 of the pipe entering the nipple 2 is further flared by angle a, the larger angle of the flare of the landing cone. The pipe thus prepared is connected to the nipple 2 to form a tight connection.

Subject invention

A method of connecting pipe ends with a cone nipple nipple, characterized in that, in order to increase the durability and reliability of the connection, the pipe section included in the nipple and adjacent to the landing cone is additionally flared to an angle smaller than the flare angle of the landing cone itself.