US 11,982,397 B2
Resin rich polyurea-based integrated external layer for reinforced thermosetting resin piping protection
Abderrahim Fakiri, Dhahran (SA); Md Anwar Parvez, Dhahran (SA); and Gusai H. AlAithan, Saihat (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Oct. 26, 2021, as Appl. No. 17/452,342.
Prior Publication US 2023/0130880 A1, Apr. 27, 2023
Int. Cl. B29C 70/30 (2006.01); B29C 70/16 (2006.01); B32B 1/08 (2006.01); B32B 5/02 (2006.01); B32B 27/12 (2006.01); B32B 27/40 (2006.01); B32B 37/15 (2006.01); C03C 25/36 (2006.01); F16L 9/12 (2006.01); B29K 63/00 (2006.01); B29K 309/08 (2006.01); B29L 23/00 (2006.01); F16L 57/06 (2006.01); F16L 58/00 (2006.01)
CPC F16L 9/121 (2013.01) [B29C 70/16 (2013.01); B29C 70/30 (2013.01); B32B 1/08 (2013.01); B32B 5/02 (2013.01); B32B 27/12 (2013.01); B32B 27/40 (2013.01); B32B 37/15 (2013.01); C03C 25/36 (2013.01); B29K 2063/00 (2013.01); B29K 2309/08 (2013.01); B29L 2023/22 (2013.01); B32B 2250/02 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2262/101 (2013.01); B32B 2305/076 (2013.01); B32B 2305/08 (2013.01); B32B 2305/10 (2013.01); B32B 2305/72 (2013.01); B32B 2307/554 (2013.01); B32B 2307/558 (2013.01); B32B 2307/71 (2013.01); B32B 2315/08 (2013.01); B32B 2363/00 (2013.01); B32B 2375/00 (2013.01); B32B 2597/00 (2013.01); F16L 57/06 (2013.01); F16L 58/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of manufacturing a pipe, comprising:
immersing fibers or glass rovings in an uncured resin to yield impregnated fibers or impregnated glass rovings;
winding the impregnated fibers or impregnated glass rovings over a mandrel, wherein the impregnated fibers or impregnated glass rovings are wound under tension;
partially curing the resin;
applying a polyurea-based layer to the partially cured resin, applying the polyurea-based layer to the partially cured resin comprises applying a polyurea-based layer that comprises fibers or glass rovings to the partially cured resin;
forming an interface between the partially cured resin and the polyurea-based layer, wherein in the interface the impregnated fibers or impregnated glass rovings in the partially cured resin project into the polyurea-based layer;
allowing the polyurea-based layer to dry; and
completely curing the resin and polyurea-based layer.