US 12,270,494 B2
Coupling for junction of pipe-in-pipe pipeline
Jean-Aurélien Damour, Louveciennes (FR); and Christian Geertsen, Louveciennes (FR)
Assigned to ITP SA, Louveciennes (FR)
Filed by ITP SA, Louveciennes (FR)
Filed on Jan. 13, 2021, as Appl. No. 17/148,351.
Prior Publication US 2021/0215279 A1, Jul. 15, 2021
Int. Cl. F16L 13/11 (2006.01); C04B 14/06 (2006.01); C04B 28/06 (2006.01); F16L 13/02 (2006.01); C04B 103/12 (2006.01); C04B 103/32 (2006.01)
CPC F16L 13/11 (2013.01) [C04B 14/06 (2013.01); C04B 28/06 (2013.01); F16L 13/02 (2013.01); C04B 2103/12 (2013.01); C04B 2103/32 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A coupling system for pipe-in-pipe pipeline tubing, the coupling system comprising:
pipe-in-pipe pipeline tubing comprising an assembly of sections each incorporating an inner pipe and an outer pipe butt-welded to the inner pipe, two successive sections being joined together by the welding of the respective inner pipes delimiting a segment of the joined inner pipe;
a sleeve arranged perpendicularly to the segment of the joined inner pipe; and
a filler material constituted by a quick-set mortar based on aluminous cement and sand, the filler material being arranged in a free space delimited by the sleeve, the segment of the joined inner pipe, and the respective outer pipes of the two successive sections.