Full-automatic welding process of long conveying pipeline

The invention discloses a full-automatic welding process of a long conveying pipeline. The welding process is characterized in that pre-welding preparation comprises carrying out groove machining of the end faces of pipe orifices of a pipeline to be welded, wherein the parameters of grooves are characterized in that an outer groove angle a and an outer groove angle b are 5-8 DEG C, an outer grooveinner angle c is 90 DEG C, an inner groove angle d is 75+/-1.5 DEG C, the height H of a blunt edge is 1.27mm+/-0.15mm, the height h of an inner groove is 1.27mm+/-0.15mm, and the end clearance K is 0mm-0.5mm; the welding process comprises inner root welding, hot welding, filling welding and cosmetic welding; and during hot welding, filling welding and cosmetic welding, the welding wire is 1.0mm,polarity is direct current straight polarity, the welding current is 230A-255A, the welding voltage is 25-27, the wire feeding speed is 9.0m/min-11.0m/min, the welding speed of 60cm/min-70cm/min, thetransverse swinging amplitu