A hollow fiber membrane module 10 has a hollow fiber membrane bundle 11 and a housing case 15. The housing case 15 has first molding members 17 and a second molding member 18. At each first molding member, a tubular portion 19 and a nozzle portion 20 are integrally molded. The second molding member 18 has a tubular shape coaxially continuous from the tubular portion 19. Values obtained by dividing, by the wall thickness of the second molding member, the wall thicknesses of the housing case 15 at positions separated in the axial direction from a connecting position toward the first molding member 17 side by distances of 3 times and 5 times the wall thickness of the second molding member 18 are 1.0 to 1.3 and 1.0 to 1.5, respectively.

A hollow fiber membrane module 10 has a hollow fiber membrane bundle 11 and a housing case 15. The housing case 15 has first molding members 17 and a second molding member 18. At each first molding member, a tubular portion 19 and a nozzle portion 20 are integrally molded. The second molding member 18 has a tubular shape coaxially continuous from the tubular portion 19. Values obtained by dividing, by the wall thickness of the second molding member, the wall thicknesses of the housing case 15 at positions separated in the axial direction from a connecting position toward the first molding member 17 side by distances of 3 times and 5 times the wall thickness of the second molding member 18 are 1.0 to 1.3 and 1.0 to 1.5, respectively.

Multilayer pipe comprising at least a first layer and a second layer, wherein the first layer is comprised a first polymer have a first thermal stability, and the second layer is comprised of a second polymer having a second thermal stability that is improved relative to said first thermal stability. In one exemplary embodiment, the first layer is comprised of PVC or CPVC, and the second layer is comprised of polycarbonate.

The machine (1) for welding profiled elements comprises: a base frame (2); two retaining members (3, 4) of respective profiled elements (5) made at least partly of plastic and an area to be welded (6), the retaining members (3, 4) being mounted on the base frame (2) and defining a first retaining axis (A) and a second retaining axis (B) forming an angle of welding (7), and along which the profiled elements (5) can be fastened; removal means (8) of material from the profiled elements (5) to make a machining on the area to be welded (6) of the profiled elements (5); heat sealing means (9) mounted on the base frame (2) and adapted to weld the areas to be welded (6) of the profiled elements (5); adjusting means (10) of the angle of welding (7) adapted to move at least one of the retaining members (3, 4) to incline at least one of the first retaining axis (A) and the second retaining axis (B) to change the angle of welding (7); sliding means (11) of the retaining members (3, 4), mounted on the base frame (2) and adapted to move the retaining members (3, 4) in mutual approach or moving away without changing the angle of welding (7).

The machine (1) for welding profiled elements comprises: a base frame (2); two retaining members (3, 4) of respective profiled elements (5) made at least partly of plastic and an area to be welded (6), the retaining members (3, 4) being mounted on the base frame (2) and defining a first retaining axis (A) and a second retaining axis (B) forming an angle of welding (7), and along which the profiled elements (5) can be fastened; removal means (8) of material from the profiled elements (5) to make a machining on the area to be welded (6) of the profiled elements (5); heat sealing means (9) mounted on the base frame (2) and adapted to weld the areas to be welded (6) of the profiled elements (5); adjusting means (10) of the angle of welding (7) adapted to move at least one of the retaining members (3, 4) to incline at least one of the first retaining axis (A) and the second retaining axis (B) to change the angle of welding (7); sliding means (11) of the retaining members (3, 4), mounted on the base frame (2) and adapted to move the retaining members (3, 4) in mutual approach or moving away without changing the angle of welding (7).

A method of anchoring a connector element (10) in a receiving object (66) comprises inserting a distal end of the connector element (10) into a mounting hole in an insertion direction along an insertion axis; inserting a sleeve (36) comprising a thermoplastic material into the mounting hole, the sleeve (36) enclosing the connector element (10); and transferring energy to liquefy at least a portion of the thermoplastic material of the sleeve (36). A machine (500) configured for carrying out the method and a connector element anchoring kit comprising a connector element (10) and a sleeve (36) comprising thermoplastic material.

A method of anchoring a connector element (10) in a receiving object (66) comprises inserting a distal end of the connector element (10) into a mounting hole in an insertion direction along an insertion axis; inserting a sleeve (36) comprising a thermoplastic material into the mounting hole, the sleeve (36) enclosing the connector element (10); and transferring energy to liquefy at least a portion of the thermoplastic material of the sleeve (36). A machine (500) configured for carrying out the method and a connector element anchoring kit comprising a connector element (10) and a sleeve (36) comprising thermoplastic material.

One fusion machine can butt or socket fuse polyolefin pipes and fittings in straight alignment or at inwardly or outwardly mitered universal angles from 0° to 45° for butt fusion and from 0° to 10° for socket fusion. The machine is manually driven, hydraulically monitored and operated in all configurations from one side of the machine.

One fusion machine can butt or socket fuse polyolefin pipes and fittings in straight alignment or at inwardly or outwardly mitered universal angles from 0° to 45° for butt fusion and from 0° to 10° for socket fusion. The machine is manually driven, hydraulically monitored and operated in all configurations from one side of the machine.

Preform assembly for blow moulding a container, comprising at least a first and a second perform, wherein the first perform is positioned inside the second perform before blow moulding the performs into the container, wherein each perform has a body forming portion having a wall thickness of less than about 8 millimetres, preferably less than about 6 mm.