Patent ID: 6045033
Filing Date: 2000-04-04
Classification: F16L

Abstract:
A method of forming lengths of pipe adapted to be assembled together to form fluid flow conduits comprisingproviding a pipe having a first inner diameter and a central longitudinal axis,providing a ferrule which has an annular first end, said first end having an inner diameter equal to said first inner diameter and a central longitudinal axis, said ferrule having a second end formed into a flange adapted to form a flange coupling when abutted against and connected to another similar flange, said flange having an end face on said second end which is inwardly tilted toward its axis approximately 1.degree. to 5.degree., and,welding said first end of said ferrule to an end of said pipe with the central axis of said ferrule being in linear alignment with the central axis of said pipe,whereby said end face of said flange on said second end of said ferrule assumes an orientation wherein said end face is substantially normal to said central longitudinal axis.