THREADED JOINT FOR STEEL PIPES

The disclosed threaded connection for steel pipes includes a pin (10) including a tapered male thread part (11) and a shoulder part, and a box including a tapered female thread part and a shoulder part. In a made up state in which the shoulder parts are in contact with each other, roots (13) of the...

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Bibliographische Detailangaben
1. Verfasser:	SUGINO, Masaaki
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	The disclosed threaded connection for steel pipes includes a pin (10) including a tapered male thread part (11) and a shoulder part, and a box including a tapered female thread part and a shoulder part. In a made up state in which the shoulder parts are in contact with each other, roots (13) of the male thread part (11) are in contact with crests of the female thread part while interfering with the crests, and clearances are provided between crests (12) of the male thread part (11) and roots of the female thread part. At a longitudinal section that includes a pipe axis (CL) of the threaded connection, the crests (12) of the male thread part (11) are formed in a convex curve that is tangent to both first corner portions (12a) which are formed in an arc that connect the crests (12) and load flanks (15), and second corner portions (12b) which are formed in an arc that connect the crests (12) and stabbing flanks (14). A solid lubricant coating (30) is provided on the surface of the male thread part (11).