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.