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2 121 621

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IPC

(21) (22)

Application

97105056/06, 1997-04-02

(22)

Actual filing date

1997-04-02

(45)

Published

1998-11-10

(72)

Inventor

Protasov V.N.Shtyrev O.V.

(73)

Holder

Gosudarstvennaja Akademija Nefti I Gaza Im.I.M.GubkinaProtasov Viktor NikolaevichShtyrev Oleg Vladimirovich

METHOD OF INTERNAL CORROSION PROTECTION OF WELDED JOINTS OF PIPES PROVIDED WITH INTERNAL PROTECTIVE COAT Russian patent published in 1998 - IPC

Abstract RU 2121621 C1

FIELD: erection of piping systems. SUBSTANCE: bandage impregnated in sealing compound is pressed to inner surfaces of pipes in their joint area; use may be made of multi-layer bandage each layer of which is impregnated separately. Zone of welded joint is heated to facilitate hardening of compound impregnating the bandage. EFFECT: enhanced reliability of welded joints due to improved corrosion protection. 3 cl

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RU 2 121 621 C1

Authors

Protasov V.N.

Shtyrev O.V.

Dates

1998-11-10—Published

1997-04-02—Filed