METHOD OF MANUFACTURE OF PIPE Russian patent published in 2002 - IPC

Abstract RU 2190531 C1

FIELD: manufacture of pipes from plastic materials. SUBSTANCE: method includes reinforcement of thermoplastic tubular billet by composite fibrous material, facing and treatment of end sealing members. After facing, thermoplastic rings with end sealing members are welded to butts or their blanks which are than subjected to facing or treatment of their end sealing members. Thermoplastic rings or their blanks are welded by means of friction welding. Prior to welding the rings, grooves with undercutting or inverted cone are made on external surfaces adjoining butts. EFFECT: enhanced economical efficiency and reliability. 3 cl, 2 dwg

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RU 2 190 531 C1

Authors

Grejlikh V.I.

Maevskij I.I.

Zajtsev K.I.

Dates

2002-10-10—Published

2001-06-22—Filed