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2 190 699

(13)

(51)

IPC

(21) (22)

Application

2000130144/02, 2000-12-04

(24)

Start date

2000-12-04

(22)

Actual filing date

2000-12-04

(45)

Published

2002-10-10

(72)

Inventor

Man'Kina N.N.Zhuravlev L.S.Chubar' L.S.Shchelokov V.I.Lisejkin I.D.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Teplotekhnicheskij Nauchno-Issledovatel'Skij Institut"Otkrytoe Aktsionernoe Obshchestvo Kompanija

METHOD OF OXYGEN PASSIVATION AND CLEANING OF STEEL PIPES Russian patent published in 2002 - IPC

Abstract RU 2190699 C2

FIELD: corrosion protection; plants manufacturing steel pipes. SUBSTANCE: passivation and cleaning of steel pipes includes treatment of pipes with oxygen-containing agent; air is mainly used for the porous at addition of oxygen or nitrogen to concentration not exceeding 1.2 g/l; treatment is conducted for 0.5-50 min at flow rate of 50-200 m/s and temperature of 300-500 C. EFFECT: enhanced efficiency; ecological safety. 3 ex

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RU 2 190 699 C2

Authors

Man'Kina N.N.

Zhuravlev L.S.

Chubar' L.S.

Shchelokov V.I.

Lisejkin I.D.

Dates

2002-10-10—Published

2000-12-04—Filed