Abstract: A composite pipe termination that includes: a) a composite pipe having an interior pipe surface, an exterior pipe surface, a pipe end and a liner; b) an annular portion of composite material attached to the exterior pipe surface, the annular portion having a first stepped region in which the annular portion decreases in radial thickness in the axial direction away from the pipe end by at least one step; c) an annular collar enclosing the first stepped region; d) an end-fitting interfacing with the annular portion and locked to the annular collar. The annular collar has a stepped portion in which the annular collar increases in radial thickness in the axial direction away from the pipe end by the same number of steps as in the first stepped region. The steps of the stepped portion mate with steps of the first stepped region.

Abstract: A composite pipe termination is provided comprising: a) a composite pipe having an interior pipe surface, an exterior pipe surface, a pipe end and a liner; b) a composite annular portion attached to the exterior pipe surface, the external surface of the annular portion comprising circumferentially extending ridges; c) a collet having an interior collet surface, wherein the collet encloses at least a part of the annular portion and wherein the interior collet surface comprises circumferentially extending grooves, and wherein circumferentially extending ridges on the external surface of the annular portion mesh with circumferentially extending grooves on the interior collet surface to provide axial movement blocking means; d) an annular collar which encloses and mates with the collet to prevent the collet from moving axially relative to the annular collar; e) an end-fitting locked to the annular collar.

Abstract: A composite pipe termination is provided comprising: a) a composite pipe having an interior pipe surface, an exterior pipe surface, a pipe end and a liner; b) a composite annular portion attached to the exterior pipe surface, the external surface of the annular portion comprising circumferentially extending ridges; c) a collet having an interior collet surface, wherein the collet encloses at least a part of the annular portion and wherein the interior collet surface comprises circumferentially extending grooves, and wherein circumferentially extending ridges on the external surface of the annular portion mesh with circumferentially extending grooves on the interior collet surface to provide axial movement blocking means; d) an annular collar which encloses and mates with the collet to prevent the collet from moving axially relative to the annular collar; e) an end-fitting locked to the annular collar.

Abstract: A composite pipe termination is provided, comprising: a) a composite pipe having an interior pipe surface, an exterior pipe surface, a pipe end and a liner b) an annular portion of composite material attached to the exterior pipe surface, the annular portion comprising a first stepped region in which the annular portion decreases in radial thickness in the axial direction away from the pipe end by means of at least one step; c) an annular collar enclosing the first stepped region; d) an end-fitting interfacing with the annular portion and locked to the annular collar; the annular collar comprises a stepped portion in which the annular collar increases in radial thickness in the axial direction away from the pipe end by means of the same number of steps as are comprised in the first stepped region, wherein step(s) of the stepped portion mate with step(s) of the first stepped region.