A clamping system for connecting a first tube and a second tube, the clamping system including a collar which includes a belt able to be clamped around clamping surfaces of the first and second tubes, the belt has a first and a second flank between which an internal recess able to receive the clamping surfaces is delimited. The collar carries at least one retaining loop disposed outside the belt. The loop has a first end fastened to the collar and a second end which is free and which is located on the outer side of the first flank. The loop is able to adopt a position of active retaining configuration in which its second end protrudes towards the axis of the collar relative to the edge of the first flank, and to be deformed relative to this active configuration so that the second end is moved radially outwardly.

A method for manufacturing a pipe conduit arrangement including sticking a pipe stub onto a pipe conduit at least up to the flush state of the of the flange section end-face and the nips conduit end-face, fixing the pipe conduit in the pipe stub in a press fit which is produced by the radial widening of the pipe conduit, and axially clamping the arisen pipe conduit units by way of clamping the flange sections of the pine stubs into the nine conduit arrangement. Also described is a pipe conduit arrangement.

A method for manufacturing a pipe conduit arrangement including sticking a pipe stub onto a pipe conduit at least up to the flush state of the of the flange section end-face and the nips conduit end-face, fixing the pipe conduit in the pipe stub in a press fit which is produced by the radial widening of the pipe conduit, and axially clamping the arisen pipe conduit units by way of clamping the flange sections of the pine stubs into the nine conduit arrangement. Also described is a pipe conduit arrangement.

In various embodiments, the stabilizing face ring joint flange and assemblies thereof can be adapted to include a ring joint gasket and resist leaks when a fluid flowing through a pipe at high temperatures and pressures. The stabilizing face ring joint flange assembly with the ring grooves in each flange can be situated in such a way that once full compression is achieved on the ring groove by the gasket, raised faces of the two flanges can meet to ensure that the rotation of the pump or any potential perpendicular loading do not provide a stress on the gasket that would cause the gasket to deform or cause a seal to be lost.

In various embodiments, the stabilizing face ring joint flange and assemblies thereof can be adapted to include a ring joint gasket and resist leaks when a fluid flowing through a pipe at high temperatures and pressures. The stabilizing face ring joint flange assembly with the ring grooves in each flange can be situated in such a way that once full compression is achieved on the ring groove by the gasket, raised faces of the two flanges can meet to ensure that the rotation of the pump or any potential perpendicular loading do not provide a stress on the gasket that would cause the gasket to deform or cause a seal to be lost.

A pipe coupling arrangement includes two end members, each having a pipe attachment end and a sealing end that engages the other's sealing end. Each sealing end includes radially inner and outer collars, which are radially separated by a pocket. When the sealing ends engage one another the pockets form a chamber. At least one seal member is positioned in the chamber. An alignment ring fits in the chamber, aligning the end members. A coupling pushes the end members towards each other, compressing the at least one seal member sufficiently to seal against fluid leakage. The inner collars engage one another while the outer collars of the end members are axially spaced apart by a gap selected to reduce to zero upon application of a selected clamping force on the end members, thereby limiting deformation of the outer collars.

A pipe coupling arrangement includes two end members, each having a pipe attachment end and a sealing end that engages the other's sealing end. Each sealing end includes radially inner and outer collars, which are radially separated by a pocket. When the sealing ends engage one another the pockets form a chamber. At least one seal member is positioned in the chamber. An alignment ring fits in the chamber, aligning the end members. A coupling pushes the end members towards each other, compressing the at least one seal member sufficiently to seal against fluid leakage. The inner collars engage one another while the outer collars of the end members are axially spaced apart by a gap selected to reduce to zero upon application of a selected clamping force on the end members, thereby limiting deformation of the outer collars.

A sealing device for sealing a pipeline arrangement, a method for the production of a sealing device, and a pipeline system including a sealing device and a pipeline arrangement. The sealing device includes a seal and data medium assigned to the seal with electronic data memory to which seal specific information can be or is written.

A hard pipe connecting device and manifold system are disclosed that solve technical problems of existing fracturing pipelines, such as poor safety performance, too many connecting parts, inconvenient and ineffective connection between the parts, complicated installation structure, and difficulty to adjust the distance and the angle. In order to solve the technical problems, the hard pipe connecting device includes at least one non-concentric connecting pipe joint, which includes a pipe body and first flanges at opposite ends of the pipe body. The two first flanges are parallel to each other with a distance difference h, where h>0.

A hard pipe connecting device and manifold system are disclosed that solve technical problems of existing fracturing pipelines, such as poor safety performance, too many connecting parts, inconvenient and ineffective connection between the parts, complicated installation structure, and difficulty to adjust the distance and the angle. In order to solve the technical problems, the hard pipe connecting device includes at least one non-concentric connecting pipe joint, which includes a pipe body and first flanges at opposite ends of the pipe body. The two first flanges are parallel to each other with a distance difference h, where h>0.