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US 5,476,343 AGranted
Offshore pipeline insulated with a cementitious coating
OwnerGlen R. Sumnerinventor
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Abstract
An improved thermally insulated, impact and abrasion resistant pipeline and an impact resistant, flexible, cementitious material which maintains low thermal conductivity when submerged and which is suitable for insulating underwater pipelines, said material comprising: hydraulic cement, a closed cell aggregate which exhibits low water absorption under high hydrostatic pressure and a polymeric modifier which increases flexibility and reduces porosity of the cured cementitious material.
Claims21
An insulated under water pipeline comprising in combination:
- (a) continuous section of pipe;
- and
- (b) an insulation mixture comprising:
- (i) 40 to 55 weight percent of a binder component comprising;
- (1) 30 parts by weight of hydraulic cement;
- (2) 0 to 9 parts by weight of silica fume;
- and
- (3) 0.1 to 1 parts by weight polymeric modifier;
- and
- (ii) 40 to 25 weight percent fly ash cenospheres, glass microspheres or a combination of the two;
- and
- (iii) water in sufficient quantity to achieve the desired consistency, normally 19 to 23 percent;
- said insulation mixture exhibiting flexibility, high impact and abrasion resistance, and low thermal conductivity when submerged, which is applied to the outer surface of said pipe to a thickness necessary to provide physical strength and thermal insulation and cured or otherwise affixed thereon.
10 more elements
Dependencies are inferred from the claim text.