Dalmine S.p.a.

Dalmine S.p.a. (italian Joint Stock Company)

Giuseppe Rotini

Giuseppe Della Pina

Angelo Signorelli

Pipe integral threaded joint formed by a male element () and a female element () respectively placed on the external surface and on the internal surface of two truncated cone-shaped parts of the threading () having the same conicity value and being radially spaced, both being respectively divided by annular shoulders (') which are parallel and orthogonal with respect to the pipe axis. They are provided two sealing surfaces (&#x2032;), one of them being cone-shaped and the other being spherical. After the screwing of the two elements () said two annular shoulders (&#x2032;) are in contact. Each male () and female () element comprises, respectively along its external and internal surface, a circumference cavity () placed between a part of the threading and the annular shoulder (&#x2032;) in order to allow the expansion of the lubricating fat.

Pipe integral threaded joint

A flush-type integral threaded joint with truncated-cone threads, with two scaling surfaces&#x2033;) set at the end of the threaded portions (), and with two annular scaling shoulders (&#x2033;). The two threaded portions () of the male element () and female element (), respectively, have the same value of conicity, and the two sealing surfaces (&#x2033;) are, in one case, conical or cylindrical, and in the other spherical. The threaded portion of each male and female element may have an end area with a thread that is not perfect.

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Dalmine, Italy

Giuseppe Rotini