Examples herein relate generally to methods, and associated components, characterized by the laser welding of crosslinked polyethylene plumbing components so as to create a leak-proof connection with both mechanical and thermal fusion bonds.

A jig assembly and method of use are provided for positioning and re-rounding pipes for welding. The jig assembly comprises a first jaw assembly and a second jaw assembly which position and move a coupling onto one pipe then the second pipe for subsequent welding.

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.

A jig assembly and method of use are provided for positioning and re-rounding pipes for welding. The jig assembly comprises a first jaw assembly and a second jaw assembly which position and move a coupling onto one pipe then the second pipe for subsequent welding.

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.

A tapping saddle for a plastic main pipe carrying a medium includes a stub having a central axis, a saddle piece, and a drill. The drill is configured to be moved axially in the stub. A heating element geometry, which is used for welding the tapping saddle to a main tube outer circumference, is arranged on an inside diameter of the saddle piece. The heating element geometry has a winding having an outer winding region and an inner winding region. In the inner winding region, the winding extends in meandering loops along a circle concentric with the central axis of the stub.

The present invention relates to a method and to a device for assembling together two tubes (1, 2) comprising a tubular junction sleeve and an internal pipe liner tube made of thermoplastic materials by laser welding two contact surfaces of revolution (1-1, 2-1) pressed one against the other at the ends of the tubular sleeve of said liner tube overlapping coaxially.

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.

A tube scraping tool comprises: a handle; and a blade, carried by the handle. The tool has first and second laterally spaced apart portions for engaging the tube outer diameter (OD) surface during a drawing of the tool along the tube. The blade has a cutting edge trailing the first and second portions during the drawing and laterally between the first and second portions.

The connector (200) can join an end of a first flexible thermoplastic tube segment (202) to an end of at least a second flexible thermoplastic tube segment (202). The connector (200) is made of a thermoplastic material allowing, through heat fusion, to join the inner surface (244) of the receptacles (240, 260) of the connector (200) to the outer surface (206) of the corresponding tube segments (202), and this, without creating a gap or an irregularity inside the portion of the liquid circuit. The heat fusion can result in airtight and robust joints made with a high precision and that are uniform, even if they can be made under difficult conditions. The proposed concept can be particularly useful in sugar making.