Abstract: Control valve (5, 5?) for connection units for flexible hoses, comprising a plurality of petals (segments or sectors) (6, 7; 6?, 7?) rotatable between a position of complete opening and a position of complete closing. The aforesaid petals (6, 7; 6?, 7?) are rotatable around pivoting axes defined by spherical pins (70) interposed between laterally adjacent petals and provided with a threaded positioning neck (71) inserted and screwed in a respective radial hole (72) of the body (1, 2) of the connection unit. A locking cap (73) is screwed in said radial hole (72) and tightly abutting against said neck (71) of the spherical pin (70) for keeping said spherical pin (70) in a suitable position to enable a correct and precise pivoting between the two adjacent petals (6, 7; 6?, 7?).

Abstract: A control valve for connection units for flexible hoses comprises a plurality of petals rotatable between a position of complete opening and a position of complete closing, wherein rotatable petals of different shape and sizes alternate in pairs along the circumference of the connection unit. The petals of smaller size have a substantially triangular shape with straight lateral sides and a rounded end which fluid-tightly abut against corresponding straight lateral, sides and curved parts of the petals of larger size when the valve is closed.

Abstract: A control valve for connection units for flexible hoses comprises a plurality of petals rotatable between a position of complete opening and a position of complete closing. The petals consist of pairs of petals with different shape and sizes, alternately arranged along the circumference of the connection unit. The petals of smaller size are controlled to close more slowly than those of larger size. The upstream surface of the petals of smaller size is provided with a pair of fins laterally protruding from the upstream surface so as to rest on the upstream surface of the petals of larger size to oblige the latter to close before the petals of smaller size.

Abstract: A control valve for connection units for flexible hoses comprises a plurality of petals rotatable between a position of complete opening and a position of complete closing, wherein rotatable petals of different shape and sizes alternate in pairs along the circumference of the connection unit. The petals of smaller size have a substantially triangular shape with straight lateral sides and a rounded end which fluid-tightly abut against corresponding straight lateral, sides and curved parts of the petals of larger size when the valve is closed.

Abstract: A control valve for connection unit for flexible pipes, comprising a plurality of sectors, (slices or petals), rotatable between a complete opening position and a complete closing position is described. The aforesaid plurality of rotatable sectors comprises at least two series of rotating sectors of different shape and dimensions disposed in an alternate way along the circumference of the connection unit. The smaller sectors can be controlled in such a way to close slower than the bigger ones. The shape and dimensions of the rotational sectors are such to consent a partial overlapping of the borders of the adjacent sectors for a better tightness between the sectors themselves.

Abstract: A device for automatic closure of control valves in separable connection units for flexible pipes is described. The device comprises, for every sector of the control valve, a slidable body operating on the valve sector to cause closing and opening rotation thereof, elastic means housed within a first chamber to activate the sliding body to cause the closing rotation of said valve sector, a braking fluid housed in a second chamber to brake the movement of said sliding body in the closing direction and fluid dynamic communication means between said chambers to permit the controlled transfer of the braking fluid from the second chamber to the first chamber during the movement of the sliding body in the closing direction. The fluid dynamic communication means comprise a passage duct with an enlarged part and a cartridge with external grooves of variable length inserted in said enlarged part.

Abstract: A control valve for connection units for flexible hoses comprises a plurality of petals rotatable between a position of complete opening and a position of complete closing. The petals consist of pairs of petals with different shape and sizes, alternately arranged along the circumference of the connection unit. The petals of smaller size are controlled to close more slowly than those of larger size. The upstream surface of the petals of smaller size is provided with a pair of fins laterally protruding from the upstream surface so as to rest on the upstream surface of the petals of larger size to oblige the latter to close before the petals of smaller size.

Abstract: Control valve (5, 5?) for connection units for flexible hoses, comprising a plurality of petals (segments or sectors) (6, 7; 6?, 7?) rotatable between a position of complete opening and a position of complete closing. The aforesaid petals (6, 7; 6?, 7?) are rotatable around pivoting axes defined by spherical pins (70) interposed between laterally adjacent petals and provided with a threaded positioning neck (71) inserted and screwed in a respective radial hole (72) of the body (1, 2) of the connection unit. A locking cap (73) is screwed in said radial hole (72) and tightly abutting against said neck (71) of the spherical pin (70) for keeping said spherical pin (70) in a suitable position to enable a correct and precise pivoting between the two adjacent petals (6, 7; 6?, 7?).

Abstract: A control valve for connection unit for flexible pipes, comprising a plurality of sectors, (slices or petals), rotatable between a complete opening position and a complete closing position is described. The aforesaid plurality of rotatable sectors comprises at least two series of rotating sectors of different shape and dimensions disposed in an alternate way along the circumference of the connection unit. The smaller sectors can be controlled in such a way to close slower than the bigger ones. The shape and dimensions of the rotational sectors are such to consent a partial overlapping of the borders of the adjacent sectors for a better tightness between the sectors themselves.

Abstract: A device for automatic closure of control valves in separable connection units for flexible pipes is described. The device comprises, for every sector of the control valve, a slidable body operating on the valve sector to cause closing and opening rotation thereof, elastic means housed within a first chamber to activate the sliding body to cause the closing rotation of said valve sector, a braking fluid housed in a second chamber to brake the movement of said sliding body in the closing direction and fluid dynamic communication means between said chambers to permit the controlled transfer of the braking fluid from the second chamber to the first chamber during the movement of the sliding body in the closing direction. The fluid dynamic communication means comprise a passage duct with an enlarged part and a cartridge with external grooves of variable length inserted in said enlarged part.

Abstract: A device for the quick coupling of a pipe fitting (50) to a flanged pipe is described. The device comprises a coupling plate (13) that is rigidly fastened to one end of the fitting so as to be axially approachable to the front of a terminal flange (12) of the flanged pipe, at least three locking wheels (15) rotatable around their own axes and projecting frontally from the plate (13) in circumferentially spaced positions and remotely controllable member (19) for controlling the rotation of the rollers (15) around their own axes. Each locking wheel (15) has round shape with a cut (24) along a circle chord in order to allow in one angular position with the chord facing the axis, and to prevent in all the other angular positions, the passage of the flange (12) of the flanged pipe among the wheels (15) for the reciprocal approach and the movement away of the plate (13) and the flange (12).

Abstract: A flange (1) for pipes for the transport of petrochemical fluids, gases and liquefied gases is described, having a bearing surface (11) for clamping jaw (3), which has a peripheral portion (2) bevelled in the direction of support of the jaw (3). Said peripheral bevelled portion (2) is preferably a curved surface.

Abstract: A connector for piping destined to the transfer of fluid at very low temperature, in particular liquefied natural gas is described. The coupling comprises a first and a second length of piping (8, 9) that are provided with respective closing valves (20, 27) and destined to be fastened, respectively, to a piping (2) for the inflow of the fluid and to a piping (6) for the receiving of the fluid. Onto the second length of piping (9) a quick-coupling mechanism (34) is mounted that comprises a circumferential sequence of jaws (36) that are suitable to provide a firm front coupling between terminal flanges (12, 17) of the two lengths of piping (8, 9), and means (35 38) for the driving of the jaws. Each one of said lengths of piping (8, 9) is surrounded by an external coating band (23, 30) that defines with said length of piping a thermally insulating interspace (25, 32).

Abstract: A device for the quick coupling of a pipe fitting (50) to a flanged pipe is described. The device comprises a coupling plate (13) that is rigidly fastened to one end of the fitting so as to be axially approachable to the front of a terminal flange (12) of the flanged pipe, at least three locking wheels (15) rotatable around their own axes and projecting frontally from said plate (13) in circumferentially spaced positions and remotely controllable means (19) for controlling the rotation of said rollers (15) around their own axes. Each locking wheel (15) has round shape with a cut (24) along a circle chord in order to allow in one angular position with the chord facing the axis, and to prevent in all the other angular positions, the passage of the flange (12) of the flanged pipe among said wheels (15) for the reciprocal approach and the movement away of the plate (13) and the flange (12).

Abstract: A connector for piping destined to the transfer of fluid at very low temperature, in particular liquefied natural gas is described. The coupling comprises a first and a second length of piping (8, 9) that are provided with respective closing valves (20, 27) and destined to be fastened, respectively, to a piping (2) for the inflow of the fluid and to a piping (6) for the receiving of the fluid. Onto the second length of piping (9) a quick-coupling mechanism (34) is mounted that comprises a circumferential sequence of jaws (36) that are suitable to provide a firm front coupling between terminal flanges (12, 17) of the two lengths of piping (8, 9), and means (35 38) for the driving of the jaws. Each one of said lengths of piping (8, 9) is surrounded by an external coating band (23, 30) that defines with said length of piping a thermally insulating interspace (25, 32).

Abstract: A connector for piping is described of the type comprising two tubular fitting parts (1, 2) and quick-coupling and quick release means (15) having a plurality of locking segments (16) circumferentially distributed in a plane perpendicular to the axis of said fitting parts (1, 2) and housed in radial slots (17) of an axial projecting portion (6) of a first fitting part (2) that, during the coupling stage, is superimposable to a corresponding projecting axial portion (5) of the second fitting part (1). A revolving ring (18) can be controlled to rotate in order to work on said locking segments (16) so as to push them into at least one radial seat (33) of said projecting portion (5) of the second part of joint (1) or to house them in its own radial seat (34), respectively for the coupling and the uncoupling of said fitting parts (1, 2).