DUCT WITH SHEATH HAVING REDUCED PERVIOUSNESS TO ACID COMPOUNDS

摘要

The duct of the invention is intended for carrying a petroleum effluent containing at least one of the CO2 and H2S acid compounds. The duct includes at least a first metal element (3, 5) and a tubular sheath made of a polymer material (2, 4), the first element being provided outside the sheath. The sheath is made of a mixture of a polymer material and of a predetermined amount of products that are chemically active with said acid compounds in order to irreversibly neutralise the corrosive effects of said compounds and to limit the corrosive effects on said metal elements. The duct is characterised in that the chemically active products are fed into the sheath in the form of particles having a specific surface higher than 5 m2/g.