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 flanged connecting assembly, which comprises: a first flange (210); a second flange (220) with a diameter greater than the diameter of the first flange; and a third flange (230), provided with a first portion (231) and a second portion (232) forming a step; wherein the first portion (231) is fitted to the first flange (210) through a first sealing element (310), and the second portion (232) is fitted to the second flange (220) through a second sealing element (320); and the first flange (210) and the second flange (220) are spaced from each other by a first distance. In this way, a gap formed under the fit of the three flanges can allow a used sealing element to be taken out vie the gap and/or a new sealing element to be assembled in via the gap.

A flanged connecting assembly, which comprises: a first flange (210); a second flange (220) with a diameter greater than the diameter of the first flange; and a third flange (230), provided with a first portion (231) and a second portion (232) forming a step; wherein the first portion (231) is fitted to the first flange (210) through a first sealing element (310), and the second portion (232) is fitted to the second flange (220) through a second sealing element (320); and the first flange (210) and the second flange (220) are spaced from each other by a first distance. In this way, a gap formed under the fit of the three flanges can allow a used sealing element to be taken out vie the gap and/or a new sealing element to be assembled in via the gap.

Dissimilar piping joint arrangement, including a first pipe section and a second pipe section and a dissimilar piping joint between the pipe sections, the first and second consecutive pipe sections being made of first and second metallic materials respectively with different material behavior and properties. An improved lifetime and extended applicability is achieved in that said dissimilar piping joint is a coupling joint, said first pipe section made of said first metallic material is provided at one end with a first coupling made of said first metallic material, said second pipe section made of said second metallic material is provided at one end with a second coupling made of said second metallic material, and the first coupling and the second coupling are bolted together, whereby a first seal is established by direct metallic contact between the front faces of the first coupling and the second coupling.

Dissimilar piping joint arrangement, including a first pipe section and a second pipe section and a dissimilar piping joint between the pipe sections, the first and second consecutive pipe sections being made of first and second metallic materials respectively with different material behavior and properties. An improved lifetime and extended applicability is achieved in that said dissimilar piping joint is a coupling joint, said first pipe section made of said first metallic material is provided at one end with a first coupling made of said first metallic material, said second pipe section made of said second metallic material is provided at one end with a second coupling made of said second metallic material, and the first coupling and the second coupling are bolted together, whereby a first seal is established by direct metallic contact between the front faces of the first coupling and the second coupling.

A flange assembly and related methods of connecting two exhaust pipes together with a flange assembly are provided. The flange assembly includes a first flange having a first mating face and a second flange connected to the first flange, wherein the second flange has a second mating face. A sealing structure is formed with the mating faces of the first and second flanges, wherein the sealing structure comprises a groove positioned on the first mating face and a ridge positioned in the second mating face, wherein the ridge occupies at least a portion of the groove with the first flange connected to the second flange.

A flange assembly and related methods of connecting two exhaust pipes together with a flange assembly are provided. The flange assembly includes a first flange having a first mating face and a second flange connected to the first flange, wherein the second flange has a second mating face. A sealing structure is formed with the mating faces of the first and second flanges, wherein the sealing structure comprises a groove positioned on the first mating face and a ridge positioned in the second mating face, wherein the ridge occupies at least a portion of the groove with the first flange connected to the second flange.

Pipe flange alignment leveling pins are disclosed to square a flange. The pins include a first and a second cylindrical magnet each configured to have a hollow axis and a positive radial pole and a negative radial pole. A first and a second chamfered hollow pin are engineered to axially receive a respective cylindrical magnet, the chamfer of each pin on an end configured complementary to a flange hole chamfer. A non-magnetic core is engineered to axially slide in and out of the hollow axis of the magnets received into respective pins wherein each of a pair of apparatus resemble a bow tie in cross section configured to align a pair of flanges in two places for a level operation. A level is set across a first and a second assembly of chamfered pins to determine a level flange ready for welding.

Master flange assemblies are disclosed herein. In one embodiment, a master flange assembly includes a master flange and a tube. The master flange includes a central aperture, at least one through-hole, and a plurality of cavities. The tube is arranged to pass through the central aperture and form the master flange assembly when secured to the master flange. In one embodiment, the plurality of cavities are recessions formed in a first surface of the master flange, wherein the recessions do not pass through the master flange. In one embodiment, the plurality of cavities are separated by ribs. In one embodiment, the master flange includes a shoulder recessed from a second surface of the master flange and adjacent to the central aperture. The tube includes a rim that engages the shoulder of the master flange when the tube is secured to the master flange to form the assembly.

Master flange assemblies are disclosed herein. In one embodiment, a master flange assembly includes a master flange and a tube. The master flange includes a central aperture, at least one through-hole, and a plurality of cavities. The tube is arranged to pass through the central aperture and form the master flange assembly when secured to the master flange. In one embodiment, the plurality of cavities are recessions formed in a first surface of the master flange, wherein the recessions do not pass through the master flange. In one embodiment, the plurality of cavities are separated by ribs. In one embodiment, the master flange includes a shoulder recessed from a second surface of the master flange and adjacent to the central aperture. The tube includes a rim that engages the shoulder of the master flange when the tube is secured to the master flange to form the assembly.