A PVC-O pipe has an axis of symmetry, a main longitudinal extension in a direction parallel to the axis from first to second ends, an inner chamber passing from the first to second end and a seal, positioned in a respective housing seat, with circumferential extension relative to the axis. The seal has an inner surface, facing the inner chamber, and an outer surface, facing the housing seat. The outer surface has first and second contiguous portions defining a cusp. The first and second portions are inclined relative to a parallel direction by respective acute angles. The inner chamber has a taper leading externally at the first end, having a divergent shape. The taper has an inclination relative to the parallel direction equal to an acute angle whose value relates to the value of the acute angle of the first portion, relative to the parallel direction.

A method of welding a gasket to a spigot portion of a pipe section is described. The method includes supporting the gasket in a recess on the spigot portion of the pipe section. The gasket includes a seating portion and a sealing portion. The sealing portion includes a first shoulder portion and a second shoulder portion. A first bonding portion extends from the first shoulder portion and a second bonding portion extends from the second shoulder portion. The first bonding portion and the second bonding portion are provided to bond the gasket to the spigot portion. The method further includes heating a portion of the gasket and an adjacent surface of the spigot portion and applying a force onto the portion of the gasket following the application of heat to fuse the gasket onto the spigot portion.

A method of welding a gasket to a spigot portion of a pipe section is described. The method includes supporting the gasket in a recess on the spigot portion of the pipe section. The gasket includes a seating portion and a sealing portion. The sealing portion includes a first shoulder portion and a second shoulder portion. A first bonding portion extends from the first shoulder portion and a second bonding portion extends from the second shoulder portion. The first bonding portion and the second bonding portion are provided to bond the gasket to the spigot portion. The method further includes heating a portion of the gasket and an adjacent surface of the spigot portion and applying a force onto the portion of the gasket following the application of heat to fuse the gasket onto the spigot portion.

A system and method for automatically jointing of reinforced thermosetting resin (RTR) pipes. For example, an automated installation of RTR joints system may have an inductor and a pig for automated in-field installation of RTR pipes. The inductor may be fitted on an outside of RTR joint. Additionally, the pig may be inserted inside the pipeline and remotely controlled to assist operators during the alignment of the pipes and subsequent joint making/welding. Through the successive inflation and deflation of pneumatic wheels placed along the pig, the pig may autonomously move inside the RTR pipeline (from one RTR joint to the other) during the installation, while also be used to apply internal pressure at specific locations of the pipe, as needed, during installation.

A system and method for automatically jointing of reinforced thermosetting resin (RTR) pipes. For example, an automated installation of RTR joints system may have an inductor and a pig for automated in-field installation of RTR pipes. The inductor may be fitted on an outside of RTR joint. Additionally, the pig may be inserted inside the pipeline and remotely controlled to assist operators during the alignment of the pipes and subsequent joint making/welding. Through the successive inflation and deflation of pneumatic wheels placed along the pig, the pig may autonomously move inside the RTR pipeline (from one RTR joint to the other) during the installation, while also be used to apply internal pressure at specific locations of the pipe, as needed, during installation.

A sealing arrangement includes: a first pipe and a second pipe, which are arranged substantially adjacent to each other in a flow direction and together form a line, the first pipe having a first end and the second pipe has a second end, the first end enclosing the second end at a radial spacing; and a sealing sleeve comprising a sealing material, the sealing sleeve being sealingly arranged under radial elastic preloading in a gap formed by the spacing and sealingly contacting an inner circumference of the first pipe and an outer circumference of the second pipe.

A fitting to interconnect water pipes or to connect pipes with valves or mountings. The connector housing has an O-ring seat, constituting two walls of a groove for an O-ring. The fitting comprises a clamping sleeve, having a first end provided with a flange, which forms a third wall of the O-ring seat groove. The flange is retained against the coupling housing by a nut screwed by hand onto outer threads on the coupling housing. The clamping sleeve is adapted to be clamped against a pipe which is inserted into the clamping sleeve, and the O-ring seals against the outer surface of the pipe.

A polymer pipe has a length between a first end and a second end. The length and the first end have a first diameter and the second end is a belled end having a second diameter larger than the first diameter. An insert device is received within the second end and has an annular body and a spline groove formed in the annular body and facing radially inward. The insert device is pre-installed in the belled end during the belling process.

A polymer pipe has a length between a first end and a second end. The length and the first end have a first diameter and the second end is a belled end having a second diameter larger than the first diameter. An insert device is received within the second end and has an annular body and a spline groove formed in the annular body and facing radially inward. The insert device is pre-installed in the belled end during the belling process.

A system and method for automatically jointing of reinforced thermosetting resin (RTR) pipes. For example, an automated installation of RTR joints system may have an inductor and a pig for automated in-field installation of RTR pipes. The inductor may be fitted on an outside of RTR joint. Additionally, the pig may be inserted inside the pipeline and remotely controlled to assist operators during the alignment of the pipes and subsequent joint making/welding. Through the successive inflation and deflation of pneumatic wheels placed along the pig, the pig may autonomously move inside the RTR pipeline (from one RTR joint to the other) during the installation, while also be used to apply internal pressure at specific locations of the pipe, as needed, during installation.