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2 081 368

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C1

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IPC

(21) (22)

Application

94007750/06, 1994-03-03

(22)

Actual filing date

1994-03-03

(45)

Published

1997-06-10

(72)

Inventor

Drejtser V.I.Khramenkov S.V.Zagorskij V.A.Alekseev S.A.

(73)

Holder

Drejtser Vladimir Isaakovich

METHOD OF COATING INNER SURFACE OF PIPE LINE Russian patent published in 1997 - IPC

Abstract RU 2081368 C1

FIELD: mechanical engineering. SUBSTANCE: hose lining made from polymer composite material is introduced in pipe at one its end. This material is simultaneously pressed to surface of pipe line. Material is hardened in two stages under action of pressure of heat-transfer agent. At first stage, mixture of compressed air and water steam at ratio of from 10:1 to 1:10 at temperature of from 90 to 100 C is used as heat-transfer agent to give material stability of form. Superheated water of heat supply line at its working temperature is used at second stage. EFFECT: enhanced efficiency. 1 tbl

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RU 2 081 368 C1

Authors

Drejtser V.I.

Khramenkov S.V.

Zagorskij V.A.

Alekseev S.A.

Dates

1997-06-10—Published

1994-03-03—Filed

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