CRACK GROWTH LIMITER IN HIGH-PRESSURE WELDED PIPELINES AND METHOD OF MAKING IT

Spreading of cracks in welded high-pressure pipelines is prevented by inserting a section of a cylindrical pipe which has in the material an element of inserts made of a materialwith at least the strength of the section and at an angle to the presumed direction of spread of any crack. The thickness...

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Bibliographische Detailangaben
Hauptverfasser:	BESHENTSEV, ANATOLY VASILIEVICH, POSTIZHENKO, VLADIMIR KALISTRATOVICH, MEDOVAR, LEV BORISOVICH, BOGACHENKO, ALEXEI GEORGIEVICH, PIVOVARSKY, NILOLAI BORISOVICH, SAENKO, VLADIMIR YAKOVLEVICH, PATON, BORIS EVGENIEVICH, US, VASILY IVANOVICH, MEDOVAR, BORIS IZRAILEVICH
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BLASTING CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MACHINE TOOLS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PIPES PUNCHING METAL ROLLING OF METAL SOLDERING OR UNSOLDERING SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	Spreading of cracks in welded high-pressure pipelines is prevented by inserting a section of a cylindrical pipe which has in the material an element of inserts made of a materialwith at least the strength of the section and at an angle to the presumed direction of spread of any crack. The thickness of each insert should be at least equal to 30% of that of the section. The strength of an insert should be between zero and the yield strength of the material of the section. Un limiteur (1) d'expansion de fissure se compose d'un tronçon (5) de tube doté d'insertions (6) de forme allongée construites dans ses parois et orientées à un certain angle par rapport au sens prévu de progression de la fissure. Les pièces rapportées (6) sont faites d'un matériau dont la résistance est égale ou supérieure à celle du matériau du limiteur (1). Un procédé de fabrication dudit limiteur (1) d'expansion de fissure prévoit de placer dans le moule de coulage, avant versement du métal fondu, les pièces rapportées de forme allongée, ainsi que de souder l'ébauche en feuille pendant le procédé de fabrication de tube, le long des bords de l'ébauche où sont situées les faces terminales des pièces rapportées.