Product for coating the internal surface of a conduit, method and machine using same and conduit coated with same
AssigneePont-A-Mousson S.A.
InventorPascal Soukatchoff
Life of this patent
Estimating the term…
Abstract
The invention relates to a product for the internal coating of a pipeline component (1), in particular a metal pipeline component, comprising an internal wall (4) of high curvature. This product comprises a solid charge and a liquid. The liquid is a solution of an alkali metal silicate and the solid charge comprises sand, between 20 and 30% by mass of a binder which sets chemically by reaction with the liquid, and between 4 and 10% by mass of plasticizing adjuvants. The solid charge and the liquid are intended to be mixed (in 5) with a liquid/binder ratio by mass of between approximately 0.3 and 0.45. Application to pipelines for discharge of waste water made of spheroidal graphite cast iron.
Claims25
A product comprising (a) a liquid which is a solution of an alkali metal silicate and (b) a solid charge comprising (i) sand, (ii) a binder, in an amount between 20 and 30% by mass, which sets chemically by reaction with said liquid, and (iii) a plurality of plasticizing adjuvants in an amount between 4 and 10% by mass, said liquid and solid charge being separated from one another, wherein said liquid and solid charge is to be mixed at a liquid/binder ratio by mass of between approximately 0.35 and 0.45 for the internal coating of a pipeline component.
A process for the internal coating of a pipeline component comprising an internal wall of high curvature, said process comprising:
- mixing a liquid and a solid charge at a liquid/binder ratio by mass of approximately 0.35 to 0.45, to obtain a substantially homogeneous pasty mixture, said liquid being a solution of an alkali metal silicate and said solid charge comprising (i) sand, (ii) a binder, in an amount between 20 and 30% by mass, which sets chemically by reaction with said liquid, and (iii) a plurality of plasticizing adjuvants in an amount between 4 and 10% by mass,
- depositing said mixture in a substantially uniform way on said internal wall of the said pipeline component, and
- curing the deposited mixture to form said internal coating.
Dependencies are inferred from the claim text.