Hot-extrusion circumferential winding forming method of steel bend pipe 3PE coating

The invention discloses a hot-extrusion circumferential winding forming method of a steel bend pipe 3PE coating. A continuous forming process consisting of electrostatic epoxy powder spraying of a bottom layer, adhesive powder spraying of an intermediate layer, extruding and hot winding of a polyeth...

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Bibliographische Detailangaben
Hauptverfasser:	JIANG HONG, YANG KUNHAO, JIA HONGQING, ZHANG SIJI, XI CHUNSHENG, QIAO JUNPING, FAN JING, CHEN HUADONG, ZHANG YONGHONG, QU LEI, MOU GUODONG, HE JILONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL 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 PERFORMING OPERATIONS PIPES PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SPRAYING OR ATOMISING IN GENERAL SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The invention discloses a hot-extrusion circumferential winding forming method of a steel bend pipe 3PE coating. A continuous forming process consisting of electrostatic epoxy powder spraying of a bottom layer, adhesive powder spraying of an intermediate layer, extruding and hot winding of a polyethylene outer protective layer, rolling, air cooling, and water cooling is adopted to realize extruding and hot winding of the polyethylene outer protective layer in a bent pipe 3PE anticorrosion coating, and finally form a three-layer integrated structure. The hot-extrusion circumferential winding forming method of the steel bend pipe 3PE coating effectively solves the problem of difficult control on the anticorrosion quality of an existing bent pipe 3PE anticorrosion coating. By means of advanced process techniques, the integrity and the bonding strength of the three-layer structure are greatly improved, which has profound significance for future improvement of the overall quality of an entire long-distance transmi