Analysis on cold cracking tendency for girth weld of X65 steel pipe and protective measures

Many damage accidents occurred on weld structure have been resulted from cracking and hardened texture of steel material, welding stress and diffusive accumulation of oxygen are basic reasons for generating cold cracking occurred in girth welds of X65 steel pipeline. By analyzing cold cracking sensitivity on X65 steel pipe's weld, puts forward corresponding protective measures to guarantee safety operation of pipelines.