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2 070 451

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C1

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IPC

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Application

94036229/08, 1994-09-28

(22)

Actual filing date

1994-09-28

(45)

Published

1996-12-20

(72)

Inventor

Jakovlev V.V.Blinov Ju.I.Lesnichij V.F.Bezzubov A.V.Kozlovskij A.M.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Nauchno-Issledovatel'Skij Institut Trubnoj Promyshlennosti"Aktsionernoe Obshchestvo Otkrytogo Tipa

METHOD OF MANUFACTURE OF WELDED COLD-WORKED PIPES Russian patent published in 1996 - IPC

Abstract RU 2070451 C1

FIELD: plastic metal working; manufacture of cold-worked welded pipes of higher geometric accuracy. SUBSTANCE: method of manufacture of cold-worked welded precision pipes includes forming of pipe blank, welding of edges, drawing and straightening of pipes. In process of drawing, reduction of pipe in wall by 20-25% and in diameter by 10-16% is carried out. EFFECT: enhanced quality of pipes. 1 tbl

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RU 2 070 451 C1

Authors

Jakovlev V.V.

Blinov Ju.I.

Lesnichij V.F.

Bezzubov A.V.

Kozlovskij A.M.

Dates

1996-12-20—Published

1994-09-28—Filed

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