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2 009 822

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C1

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IPC

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Application

4939236/08, 1991-05-24

(22)

Actual filing date

1991-05-24

(45)

Published

1994-03-30

(72)

Inventor

Vetman A.Ja.Vorob'Ev A.A.Krasnova L.M.

(73)

Holder

Nauchno-Issledovatel'Skij Institut Razrabotki I Ehkspluatatsii Neftepromyslovykh Trub

METHOD OF WELDING PIPES WITH ENAMEL INNER COATING Russian patent published in 1994 - IPC

Abstract RU 2009822 C1

FIELD: manufacture of pipe lines. SUBSTANCE: pipes are coupled with no clearance between ends of their edges. Then enamel paste is applied to ends of pipes. Root of weld is welded at incomplete penetration by amount "c" to inner diameter over entire perimeter. Strength of weld is ensured due to additional application of reinforcement "q" whose magnitude is determined by relationship q/c > 1. EFFECT: enhanced strength of weld.

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RU 2 009 822 C1

Authors

Vetman A.Ja.

Vorob'Ev A.A.

Krasnova L.M.

Dates

1994-03-30—Published

1991-05-24—Filed

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