Leading-out pipe structure at bottom of tower type thick-wall stainless steel composite plate pressure vessel

The utility model discloses an outlet pipe structure at the bottom of a tower-type thick-wall stainless steel composite plate pressure vessel, which comprises a forge piece connecting pipe, a splicing elbow and a connecting pipe flange assembly, the connecting pipe flange assembly comprises a connecting pipe and a connecting flange, and a bottom opening of an end socket is connected with the upper end of the forge piece connecting pipe. The forge piece connecting pipe, the splicing elbow and the connecting pipe flange assembly are made of the same metal material, a forge piece stainless steel surfacing layer is arranged on the inner wall of the forge piece connecting pipe, and connecting pipe flange stainless steel surfacing layers are arranged on the inner walls of the connecting pipe and the connecting flange; the splicing elbow comprises a first elbow section and a second elbow section, a first stainless steel surfacing layer is arranged on the inner wall of the first elbow section, a second stainless stee