METHOD TO PRODUCT OIL-AND-GAS PIPE PREMIUM-TYPE THREADED JOINTS
FIELD: process engineering. ^ SUBSTANCE: invention relates to pipe rolling and can be used at pipe step-rolled mills. Proposed method comprises heating ingots in furnace, piercing ingots into barrels, rolling barrels to pipes at step-rolled mill, cutting pipes, heating, sizing or reducing and straig...
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Main Authors | , , , , |
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Format | Patent |
Language | English Russian |
Published |
27.03.2010
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Subjects | |
Online Access | Get full text |
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