The present invention relates to a connection device for plastic pipe elements (1) which allows performing pre-assembly and being finally assembled without requiring skilled labor, comprising a pipe element (1) having at least one end, a plastic connection element (2) which is connected to an outer surface of said pipe element (1) through said end, which comprises a resistance wire (3) wound on the outer surface of the pipe element (1) itself.

An underwater pipe and connector assembly includes an underwater pipe having a pipe body and an annular connecting end section, a connector fixed in the connecting end section, and at least one reinforcing layer having a first fixed cover section fused to and fixedly covering the connecting end section, and a second fixed cover section fused to and fixedly covering an outer circumferential surface of the pipe body immediately adjacent the connecting end section. An outer coil is embedded between the first fixed cover section and the connecting end section and between the second fixed cover section and the outer circumferential surface of the pipe body immediately adjacent the connecting end section.

A socket fusion jig includes a pipe saddle and coupling saddle spaced apart. Rotation of a handle causes the pipe saddle and coupling saddle to move laterally relative to one another so that the pipe held in the pipe saddle may be fused to the coupling held in the coupling saddle.

A socket fusion jig includes a pipe saddle and coupling saddle spaced apart. Rotation of a handle causes the pipe saddle and coupling saddle to move laterally relative to one another so that the pipe held in the pipe saddle may be fused to the coupling held in the coupling saddle.

A stabilizer bush includes a bush main body, an annular lip, and an adhesive layer. The bush main body has a first inner peripheral surface and is formed of a cylindrical rubber elastic body. The first inner peripheral surface is to be attached to a stabilizer bar. The annular lip has a second inner peripheral surface contiguous to the first inner peripheral surface, is formed integrally with the bush main body, and is axially projected from the side toward the axial center of the axial end of the bush main body. The adhesive layer is formed of an adhesive that is applied to the first inner peripheral surface and to the second inner peripheral surface.

A synthetic resin-made welding joint that has a pipe end portion into which an end portion of a synthetic resin-made tube is to be fitted and inserted, and that is configured so that the pipe end portion and the tube end portion which is fitted and inserted thereinto are enabled to be welded together by heating of heating means which externally surrounds the pipe end portion, therefore, a synthetic resin-made holder which is fitted and attached onto the pipe end portion is disposed, and a flange for ensuring a radial expansion gap with respect to the heating means is integrally formed in the holder.

An electrofusion saddle comprising: a thermoplastic body comprising a flange and optionally a spigot which erects from said flange; and a resistance heating coil including multiple windings, wherein said resistance heating coil is partially embedded in said flange and is partially protruding from said flange, wherein the protrusion is of at least 25% of an average external diameter of said multiple windings.