摘要:
A component includes at least first and second plastics component parts which are interconnected in a connection zone. A reinforcing element includes at least one wire which bridges the connection zone. The first and second plastics component parts are welded together and/or are fused together in the connection zone. The plastics component parts may be bonded to one another.
摘要:
A device (20) for installing a tubular junction sleeve inside a pipe (1), having a mandrel (20a) of longitudinal axis (XX) supporting on its surface at least a first peripheral chamber (21) having a wall (21a) that is radially expandable by inflation. The first wall including at least one electrical connector (21b) suitable for being connected to one end of said heater wire. The connector being connected to an umbilical (24) including at least a compressed air feed duct for inflating said the first chamber and an electrical power supply duct connected to the electrical connector. The device being characterized in that the mandrel supports on its outer surface a second peripheral chamber (22) having a wall (22a) that is radially expandable by inflation, and also a weld inspection device (23) arranged in the longitudinal direction of the mandrel.
摘要:
An underwater pipe assembly includes first and second pipes each of which has opposite inner and outer circumferential surfaces and an annular end face. An inner coil surrounds the inner circumferential surfaces of the first and second pipes at a junction therebetween. An annular inner cover layer covers the inner coil. An outer coil is sleeved on the outer circumferential surfaces of the first and second pipes at a position corresponding to the inner coil. An annular outer cover layer covers the outer coil. When the inner and outer coils are energized, the end faces of the first and second pipes are melted to fuse together the pipes, and the inner and outer cover layers are melted to radially fuse with the pipes.
摘要:
The invention provides improvements to electrofusion fitting methods that allow for continuity and repeatability of welds between an electrofusion fitting and a pipe lining (or stand-alone pipe). An electrofusion fitting for joining sections of lined pipe has heating elements configured to create at least one weld between the electrofusion fitting and a pipe lining, however prior to the weld step taking place the electrofusion fitting is heated and expands accordingly to ensure contact with the pipe lining. Preheating the electrofusion fitting also provides a predetermined starting temperature for the fitting and the lining which results in improved fusion cycle reliability. Furthermore, the need for clamps or support frames to support the electrofusion fitting in situ is removed, with corresponding reductions in cycle times, complexity, and hence cost.
摘要:
Disclosed is a penetration fitting unit for seal-connection between a wall and a pipe passing through a wall opening. The unit has a cylindrical sleeve having inlet and outlet ends which internally define a tubular passage. Between the inlet and outlet ends there is at least one limit stop element protruding outwardly from the outer surface of the cylindrical sleeve having a locking ring that can be coupled with the cylindrical sleeve at the outlet end thereby forming a seat for the wall. A heat transfer means is interposed between the limit stop element and the sleeve outlet end. The heat transfer means is placed at a portion of the cylindrical sleeve's outer surface and has a first area at least partially overlapping with respect to the seat for the wall and a second area overlapping with a portion of internal surface of the locking ring.
摘要:
Method for testing and/or for pressure testing the tightness of the joints of the transfer piping of a pneumatic pipe transport system for waste, in which method the pipe section to be tested is separated inside the pipe from the other piping and pressure medium is conducted into the section, and leaks and/or the pressure of the pressure medium are monitored on the section of pipe to be tested. In the method a device is taken inside the piping, which device comprises a first wall part (21), which comprises first sealing means (31), and a second wall part (22), which comprises second sealing means (33), in which case the pipe section to be tested, more particularly the point of connection, remains between the first wall part (21) and the second wall part (22), in which case the sealing means (31) of the first wall part are brought to be tighter to the inside surface (14) of the pipe and the sealing means (33) of the second wall part (22) are brought to be tighter to the inside surface (15) of the pipe, and pressure medium is brought into the chamber space (23) bounded by the first wall part (21) and the second wall part (22) as well as by the inside surface of the pipe section, and the pressure or a change of pressure is measured or a possible sealing defect of the pipe section is otherwise indicated.
摘要:
Sleeve part of a pipe joint wherein the sleeve part includes a chamber space, into which the opposing butt ends of the pipe parts to be connected together are placed such that the sleeve part extends a distance from the point of connection of the pipe parts to be connected together on top of both pipe parts. The sleeve part includes heating member, such as resistance wires. As a consequence of the heating of the resistance wires a joint forms between the sleeve part and the pipe parts. An inspection aperture is formed in the sleeve part through the wall of the sleeve part from the exterior to the interior to a point where the positioning of the opposing butt end surfaces of the pipe parts to be connected together can be verified. The invention also relates to a pipe joint.
摘要:
pipe having at least two steel pipe elements with internal lining that are assembled together end to end, with the ends of the two pipe elements being welded together. A tubular junction sleeve is interposed inside the pipe at the abutting ends of the two pipe elements so that the end terminal portions of the sleeve are at least in part in leaktight contact with respective ones of the terminal portions at the ends of the internal linings of the two pipe elements. The leaktight contact zone is a zone of fusion welding together the materials in mutual contact constituting at least a portion of each terminal portion of the sleeve and of each respective terminal portion of the lining. At each of the terminal portions of the sleeve in the leaktight contact zone, the tubular junction sleeve presents a Joule effect heater wire arranged in a double spiral on the outer surface of each terminal portion at the ends of the sleeve.
摘要:
An exemplary method for manufacturing and reinforcing a corner in an object made from a sandwich structure, having a thermoplastic core layer (18), which is arranged between two cover layers (16), at least one of which is a plastic cover layer, which method includes the steps of: producing an object including a corner between two object parts; positioning a thermoplastic core part (24) and an additional fiber-reinforced thermoplastic layer (26) in the corner, which thermoplastic core part has a shape adapted to the corner, in such a manner that the additional fiber-reinforced thermoplastic layer (26) substantially covers the exposed surface of the core part (24); and connecting a cover layer (16) of the sandwich structure to the additional fiber-reinforced thermoplastic layer (26).