US 12,460,751 B2
Composite pipe end-fitting
Daniel Clement Holman, Southampton (GB); and Fred William Merchant, Portchester (GB)
Assigned to MAGMA GLOBAL LIMITED, (GB)
Appl. No. 18/294,979
Filed by MAGMA GLOBAL LIMITED, Portsmouth (GB)
PCT Filed Jul. 21, 2022, PCT No. PCT/GB2022/051896
§ 371(c)(1), (2) Date Feb. 2, 2024,
PCT Pub. No. WO2023/012453, PCT Pub. Date Feb. 9, 2023.
Claims priority of application No. 2111283 (GB), filed on Aug. 4, 2021.
Prior Publication US 2025/0012386 A1, Jan. 9, 2025
Int. Cl. F16L 19/02 (2006.01); F16L 23/028 (2006.01); F16L 47/04 (2006.01); F16L 47/14 (2006.01)
CPC F16L 19/0206 (2013.01) [F16L 47/14 (2013.01); F16L 23/0286 (2013.01); F16L 47/04 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A composite pipe termination comprising:
a) a composite pipe formed of composite material and having an interior pipe surface, an exterior pipe surface and a pipe end, wherein composite material is a material comprising a polymer matrix and a plurality of reinforcing fibres embedded in the polymer matrix;
b) a liner, wherein the interior pipe surface is fused to the liner;
c) 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;
d) an end-fitting which interfaces with the annular portion;
e) an annular collar enclosing the first stepped region;
f) locking means which lock the end-fitting to the annular collar to prevent the end-fitting from moving axially with respect to the annular collar;
wherein 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 at least one step of the stepped portion mates with at least one step of the first stepped region to prevent or limit axial movement of the annular collar towards the end-fitting, and
wherein the annular portion comprises a second stepped region in which the annular portion decreases in radial thickness in the axial direction towards the end-fitting by means of one or more steps.