Patent ID: 9482376
Filing Date: 2016-11-01
CPC Classification: B29C,B29L,F16L

Claim Text:
1. A pipe arrangement comprising: a pipe; a pipe coupling having on a front face a peripheral groove with a groove bottom, the pipe being inserted within the groove and a weld formed by friction welding is located between the pipe and the groove bottom of the pipe coupling; at least one window structured and arranged to connect the groove to the surroundings of the pipe coupling; and a radially inner wall and a radially outer wall arranged to form the groove, wherein an edge of the at least one window is arranged in a region of the weld between the pipe and the groove bottom of the pipe coupling, the window being sufficiently large to view at least one of the groove, the groove bottom and melted-on material from the weld, such that: the at least one window penetrates the groove bottom at least in part, and the at least one window is formed in one of the walls.