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2 279 939

(13)

(51)

IPC

B21C37/08(2006-01-01)

(21) (22)

Application

2004138646/02, 2004-12-28

(24)

Start date

2004-12-28

(22)

Actual filing date

2004-12-28

(45)

Published

2006-07-20

(72)

Inventor

Pumpjanskij Dmitrij AleksandrovichMarchenko Leonid Grigor'EvichPyshmintsev Igor' Jur'EvichSamarjanov Jurij ViktorinovichFartushnyj Nikolaj IvanovichMul'Chin Vasilij Vasil'EvichPojarkov Vladimir GeorgievichUrazov Nikolaj Vasil'EvichProsov Vladimir Leonidovich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Institut Trubnoj Promyshlennosti"

METHOD OF PRODUCING WELDED REDUCED TUBES Russian patent published in 2006 - IPC B21C37/08

Abstract RU 2279939 C1

FIELD: manufacture of tubes.

SUBSTANCE: method comprises heating continuous belt, molding, heating edges, and welding with subsequent reducing of the tube. The heating of the belt and reducing of the tube are carried out in the temperature range of phase transition, and, after welding, the internal flash is trimmed by means of blowing the pipe with oxygen from inside.

EFFECT: enhanced strength of the tubes.

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RU 2 279 939 C1

Authors

Pumpjanskij Dmitrij Aleksandrovich

Marchenko Leonid Grigor'Evich

Pyshmintsev Igor' Jur'Evich

Samarjanov Jurij Viktorinovich

Fartushnyj Nikolaj Ivanovich

Mul'Chin Vasilij Vasil'Evich

Pojarkov Vladimir Georgievich

Urazov Nikolaj Vasil'Evich

Prosov Vladimir Leonidovich

Dates

2006-07-20—Published

2004-12-28—Filed