涉及一种异型无缝钢管,包括第一管体和第二管体。第一管体的末端从外向内依次设置有与第二管体相配合的密封台阶和便于管体之间安装的定位台阶,第二管体的末端从外向内依次设置有便于管体之间安装的连接台阶和与第一管体相配合的插入台阶,第一管体与第二管体的连接处设置有密封垫,第一管体和第二管体的内部均设置有加强骨架。本实用新型具有设 The utility model relates to a special-shaped seamless steel pipe which comprises a first pipe body and a second pipe body. The end of the first pipe body is sequentially provided with a sealing step matched with the second pipe body and a positioning step for facilitating the installation between the pipe bodies from the outside to the inside, the ends of the second pipe body are sequentially arranged from the outside to the inside, The connecting step and the inserting step cooperating with the first pipe body are provided with the sealing gasket at the connection of the first pipe body and the second pipe body, and the reinforcing frame is arranged inside the first pipe body and the second pipe body. The utility model has the design