Direct welded joint of double -deck oil pipeline

Direct welded joint of double -deck oil pipeline, including the connecting pipe, the connecting pipe is by having set gradually the intensity layer outward in to, barrier layer and integration layer,the connecting pipe is including mouth of pipe portion that is located both ends and the pipe shaft p...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ZHAO SONGBAI, GENG JINGCAO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	Direct welded joint of double -deck oil pipeline, including the connecting pipe, the connecting pipe is by having set gradually the intensity layer outward in to, barrier layer and integration layer,the connecting pipe is including mouth of pipe portion that is located both ends and the pipe shaft portion that is located the middle part, the diameter of both ends mouth of pipe portion is greaterthan the diameter of pipe shaft portion, junction between mouth of pipe portion inner wall and the pipe shaft portion inner wall is provided with the step, bulge loop in the middle of pipe shaft portion inner wall middle part is provided with, be provided with the electrode in two mouth of pipe portions respectively, it has the resistance wire to fuse even the encircleing of in situ, the resistance wire both ends correspond respectively and are connected with two electrodes, pipe shaft portion both sides are provided with the leak hunting chamber, leak hunting intracavity fixedly connected with tubular metal resonator,