X65 steel pipe is widely used in engineering,pipeline welding technology is developing and updating,but gas shielded welding（FCAW-G） and manual welding（SMAW）still have irreplaceable position. In this paper,through two kinds of process qualification of X65 steel pipe with large wall thickness,the reasonable test parameters are set and the difference of physical and chemical test performance between the two welding methods is analyzed. And according to the fluid medium of the pipeline,the sulfide stress corrosion cracking resistance test（SSC） is added. In view of the relatively harsh construction environment requirements of the pipeline used in offshore engineering,the corresponding welding process quality control scheme is proposed,which has a good reference value for engineering manufacturing.