Expansion bend for connecting replacement section of submarine pipeline

• Main Authors: NI ZIQIANG, WANG FENGLIAN, XIA RICHANG, YU HONGXU, ZHANG SHIKUAN, WANG MENG, SUN XIANGJIE, LIU CAIHONG, LI QING, LI XIUFENG, HUANG HUIDI, ZHAI MO, LIU JILI, SUN GUOMIN, WANG HUI
• Format: Patent
• Language: Chinese; English
• Published: 28.02.2023
• Subjects: 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

The utility model discloses an expansion bend for connecting a replacement section submarine pipeline, which comprises a ball flange, a first expansion bend, a second expansion bend, a rotary flange and a welding neck flange, the expansion bend is of an n-shaped structure, and the ball flange is arranged in the center of the expansion bend. The two ends of the ball flange are connected with one end of a first expansion bend and one end of a second expansion bend respectively, the other end of the first expansion bend and the other end of the second expansion bend are each provided with a rotating flange, and the rotating flanges are connected with a welding neck flange fixed to a submarine pipeline. The expansion bend is connected and designed, the installation difficulty is low, and the risk is controllable. 本实用新型公开了一种用于更换段海底管道连接的膨胀弯，包括球法兰、第一膨胀弯、第二膨胀弯、旋转法兰和焊颈法兰，所述膨胀弯为几字型结构，膨胀弯的中心设置有球法兰，所述球法兰的两端分别连接第一膨胀弯的一端和第二膨胀弯的一端，所述第一膨胀弯的另一端和所述第二膨胀弯的另一端均设置有旋转法兰，所述旋转法兰与固定于海底管道的焊颈法兰相连接；该膨胀弯连接设计，安装难度低，风险可控。