Composite tube and manufacture method thereof

• Main Authors: ZHOU SHENGJIE, ZHANG YANFEI, GAO GUANGJUN, WANG JIANMING, QI JIAPENG, LI DAQUAN, WANG HAI, CHEN DAJIANG, WANG WENLONG, JIANG YI, JING YUANBIN, XIE YUHONG, KE LVXIONG
• Format: Patent
• Language: Chinese; English
• Published: 24.07.2013
• Subjects: BLASTING; COMBINED OPERATIONS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MACHINE TOOLS; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; OTHER WORKING OF METAL; PERFORMING OPERATIONS; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; TRANSPORTING; UNIVERSAL MACHINE TOOLS; WEAPONS

The invention discloses a composite tube and a manufacture method thereof. The composite tube comprises a base tube (1) and a corrosion-resistant alloy liner tube (2) mechanically combined in the base tube, wherein a corrosion-resistant alloy surfacing layer (3) is arranged at the inner circumference of the end part of the base tube, the inner end face of the corrosion-resistant alloy surfacing layer (3) is connected with the end face of the corrosion-resistant alloy liner tube (2), and the axial length of the corrosion-resistant alloy surfacing layer (3) is not less than the distance between the end face of the corrosion-resistant alloy liner tube (2) and the end face of the base tube (1). The manufacture method comprises the following steps of: S1, mechanically combining the corrosion-resistant alloy liner tube (2) in the base tube (1); S2, removing the corrosion-resistant alloy liner tube (2) (with certain length) at the end part of the composite tube; and S3, forming the corrosion-resistant alloy surfacin