Abstract

A method of forming a bend in a metal pipeline, the method comprising cutting the ends of two pipes at a predetermined angle, forming a ball in one cut end and a socket in the other cut end, joining the ends of the pipe to locate the ball within the socket, axially rotating one pipe relative to the other until the axes of the pipes are inclined to one another at a selected angle, and welding the ends of the pipes to one another.

IPC Classes  ?

• F16L 13/02 - Welded joints
• F16L 25/10 - Sleeveless joints between two pipes, one being introduced into the other
• F16L 45/00 - Pipe units with cleaning aperture and closure therefor

Abstract

A pipe joint between two metallic pipes which have been internally and/or externally coated with a material to prevent corrosion. The pipe joint includes a spigot terminating in an inverted hump supporting an elastomeric seal wherein the inverted hump is spaced from a protruding hump. The pipe joint further includes a socket adapted to fit over the spigot, the socket having an outwardly flared forward end terminating in an annular lip that engages an exterior of the protruding hump wherein the lip is welded to an exterior of the spigot.

IPC Classes  ?

• F16L 19/05 - Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts using additional rigid rings, sealing directly on at least one pipe end, which is flared either before or during the making of the connection with a rigid pressure ring between the screwed member and the exterior of the flared pipe end
• F16L 21/035 - Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings placed around the spigot end before connection