Tenaris Connections Ag

Matteo Morotti

Gabriel Eduardo Carcagno

Giuseppe Della Pina

Diego Dell'Erba

Diego Dell'erba

A threaded joint for pipes comprising at least one seal of the metal-metal interference type arranged externally to the female thread. The joint has an extension of the box beyond the seal which produces an elastic tightening band effect on the seal so that excessive interference on the seal is not necessary, thus favoring correct making up.

Threaded joint for pipes provided with seal

Described herein is a threaded joint, in which the threads are coated with a layer of dry lubricant having a thickness of between 5 &#x3bc;m and 30 &#x3bc;m and in which the nominal void volume NVV of the space () between the thread of the male tube and the thread of the female tube, is sized by means of the following formulae:where OD is the nominal outer diameter and Wt is the thickness of the wall of the pipes.

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Alzano Lombardo, Italy

Matteo Morotti