Patent ID: 7909368
Filing Date: 2011-03-22
Classification: F16L

Abstract:
1. A coupling assembly comprising: a first pipe comprising a threaded portion and a non-threaded portion, the non-threaded portion located at a free end of the first pipe; a second pipe comprising a threaded portion and a non-threaded portion, the non-threaded portion located at a free end of the second pipe; a coupling member fixedly connecting the first pipe and the second pipe, the coupling member comprising a first threaded inlet for receiving the first pipe, a second threaded inlet for receiving the second pipe and a non-threaded portion extending between the first inlet and the second inlet, the non-threaded portion of the coupling member including an annular recess, a cross-section of the coupling member defining the annular recess comprising: a lining system comprising: a ring member positioned at the free end of the first pipe, the ring member comprising a body member having a first end and a second end, the first end having a flange extending therefrom; a liner disposed in the first pipe, the liner having an end configured to cooperate with the first end of the ring member; and a corrosion barrier ring disposed between and cooperating with the second end of the ring member and the beveled portion of the non-threaded portion of the coupling member, the corrosion barrier ring comprising opposing indented ends comprised of beveled portions configured to cooperate with a beveled portion of the second end of the ring member and the beveled portion of the non-threaded portion of the coupling member.