A threaded connection for steel pipe that provides high torque performance, high tension performance and high sealability is provided. A threaded connection 1 includes: a tubular pin 10 including a pin shoulder 12, a male thread 11 and a pin seal 13; and a tubular box 20 including a box shoulder 22, a female thread 21 and a box seal 23. The male and female threads 11 and 21 are constituted by wedge threads. The pin seal 13 is provided between the pin shoulder 12 and the male thread 11. The box seal 23 corresponds to the pin seal 13 and is located on the inner peripheral surface of the box 20. When the connection is made up, the pin shoulder 12 is spaced apart from the box shoulder 22. The threaded connection 1 satisfies the following expression, (1):

3%≤(LP−SP)/LP≤7%   (1).

In expression (1), LP is the pitch between loading flanks 111 of the male thread 11, and SP is the pitch between stabbing flanks 112 of the male thread 11.

A connection arrangement includes a first and a second assembly, and an elastically deformable locking element disposed on the first assembly. The locking element is configured to releasably interlock the two assemblies and, during mounting of the two assemblies, to deform into a mounting condition and, after completion of the mounting, to form an undercut which counteracts detachment of the two assemblies. The first assembly has a stop which is movable between an operative position, which assists in maintaining the undercut of the locking element and in which the locking element bears against the stop and/or in which the locking element is deformable against the stop, and a detachment position, in which the stop, in relation to the operative position, is spaced further apart from the locking element and in which the locking element is deformable into a detachment condition for detachment of the two assemblies.

The disclosure relates to a contact-making system for electromagnetically compatible high-current applications. The contact-making system includes a screw bushing, an actuating element and a clamping element. The clamping element includes at least one inner lateral surface and at least a first end face. The screw bushing includes a connecting thread on a first side of the screw bushing, for connection to a connecting geometry. The actuating element includes a counterpressure end face. An inner radius of the clamping element is reduced by means of a radial force. The actuating element is screwed to the first side of the screw bushing, where the radial force is applied to at least the first end face of the clamping element by screwing the actuating element to the screw bushing, and the counterpressure end face of the actuating element is brought into contact with a first end face of the clamping element.

The disclosure relates to a contact-making system for electromagnetically compatible high-current applications. The contact-making system includes a screw bushing, an actuating element and a clamping element. The clamping element includes at least one inner lateral surface and at least a first end face. The screw bushing includes a connecting thread on a first side of the screw bushing, for connection to a connecting geometry. The actuating element includes a counterpressure end face. An inner radius of the clamping element is reduced by means of a radial force. The actuating element is screwed to the first side of the screw bushing, where the radial force is applied to at least the first end face of the clamping element by screwing the actuating element to the screw bushing, and the counterpressure end face of the actuating element is brought into contact with a first end face of the clamping element.

A penetration fitting assembly includes a pipe gasket having an annular portion defining a central opening and first and second stem portions extending in opposite directions from the annular portion, an inner ring assembly configured to surround the pipe gasket and including first and second inner ring halves, a ring gasket assembly configured to surround the inner ring assembly and including first and second ring gasket halves, a wall gasket, an outer ring assembly configured to surround the ring gasket assembly and including first and second outer ring halves, and a clamp configured to surround the outer ring assembly. When the penetration fitting assembly is installed, the outer ring assembly compresses the wall gasket against the wall of the sump, the clamp compresses the ring gasket assembly between the inner ring assembly and the outer ring assembly, and the clamp compresses the pipe gasket against the pipe or conduit.

A penetration fitting assembly includes a pipe gasket having an annular portion defining a central opening and first and second stem portions extending in opposite directions from the annular portion, an inner ring assembly configured to surround the pipe gasket and including first and second inner ring halves, a ring gasket assembly configured to surround the inner ring assembly and including first and second ring gasket halves, a wall gasket, an outer ring assembly configured to surround the ring gasket assembly and including first and second outer ring halves, and a clamp configured to surround the outer ring assembly. When the penetration fitting assembly is installed, the outer ring assembly compresses the wall gasket against the wall of the sump, the clamp compresses the ring gasket assembly between the inner ring assembly and the outer ring assembly, and the clamp compresses the pipe gasket against the pipe or conduit.

A penetration fitting assembly includes a pipe gasket having an annular portion defining a central opening and first and second stem portions extending in opposite directions from the annular portion, an inner ring assembly configured to surround the pipe gasket and including first and second inner ring halves, a ring gasket assembly configured to surround the inner ring assembly and including first and second ring gasket halves, a wall gasket, an outer ring assembly configured to surround the ring gasket assembly and including first and second outer ring halves, and a clamp configured to surround the outer ring assembly. When the penetration fitting assembly is installed, the outer ring assembly compresses the wall gasket against the wall of the sump, the clamp compresses the ring gasket assembly between the inner ring assembly and the outer ring assembly, and the clamp compresses the pipe gasket against the pipe or conduit.

A penetration fitting assembly includes a pipe gasket having an annular portion defining a central opening and first and second stem portions extending in opposite directions from the annular portion, an inner ring assembly configured to surround the pipe gasket and including first and second inner ring halves, a ring gasket assembly configured to surround the inner ring assembly and including first and second ring gasket halves, a wall gasket, an outer ring assembly configured to surround the ring gasket assembly and including first and second outer ring halves, and a clamp configured to surround the outer ring assembly. When the penetration fitting assembly is installed, the outer ring assembly compresses the wall gasket against the wall of the sump, the clamp compresses the ring gasket assembly between the inner ring assembly and the outer ring assembly, and the clamp compresses the pipe gasket against the pipe or conduit.

A through the hole vent pipe fitting seal includes a generally hollow cylindrical main body having an annular flange extending outwardly thereof perpendicular to the axis of said main body. An annular sealing member is positioned against a lower surface of the annular flange. An annular clamping member is movably attached on the main body to clamp the seal around a hole in a construction material on which the fitting is to be mounted.

A through the hole vent pipe fitting seal includes a generally hollow cylindrical main body having an annular flange extending outwardly thereof perpendicular to the axis of said main body. An annular sealing member is positioned against a lower surface of the annular flange. An annular clamping member is movably attached on the main body to clamp the seal around a hole in a construction material on which the fitting is to be mounted.