The insulation joint adopts integral extrusion welding but not bolt or flange connection, clasping and fixing the insulation and sealing materials into the barrel (which is the assembly).

• 绝缘接头采用整体挤压焊接形式，不得采用螺栓、法兰连接型。绝缘接头采用将绝缘和密封材料夹入并固定于套筒（组合件）内的形式。