BITUMINOUS-POLYMERIC PASTE USED FOR PROTECTION OF THE METALLIC SURFACES AGAINST CORROSION Russian patent published in 2007 - IPC F16L58/12 C08L95/00 C04B26/26 C09D195/00 

FIELD: oil-producing industry; petrochemical industry; natural gas industry; other industries; methods and the devices for removal of the sulfur from the streams of the fluid medium containing the hydrocarbons.

SUBSTANCE: the group of inventions is pertaining to the materials used for protection of the pipes and the pipe systems against corrosion, in particular, for protection against the underground and atmospheric corrosion of the external surface of the steel main pipelines transporting the natural gas, petroleum and the oil products. The inventions are realized as follows. Preparation of the bituminous-polymeric paste is exercised according to the first version with the content of the mixture of the bitumen BNK 40/180 and BNK 45/190 with concentration (in mass %): BNK 40/180 - 20-49, BNK 45/190 - 20-49, and the polymer, in the capacity of which they use butadiene-styrene thermoelastolayer, which content lays within the limits the remainder of the mass uses, and according to the second version - with the content of the mixture of bitumen BNK 40/180, BNK 45/190, BNK 90/30 and-or BN 90/10 and the polymer, in the capacity of which they use butadiene-styrene thermoelastolayer with the content of the bitumen BNK 40/180 and BNK 45/190 (in mass %): BNK 40/180 - 20-49, BNK 45/190 -20-49, styrene-butadiene thermoelastoplastic and the bitumen BNK 90/30 and-or BN 90/10 with the content, accordingly, 0.5-20; 1-45; 1-35 (in mass %) within the limits of the residue of the mass. The group of inventions allows to improve the quality of the corrosion-preventive protection of the pipelines at the expense of improvement of the paste adhesion to the steel and the improved indexes of the shock strength.

EFFECT: the group of the invention ensures the improved quality of the corrosion-preventive protection of the pipelines at the expense of improvement of the paste adhesion to the steel and the improved indexes of the shock strength.

2 cl, 3 tbl