Analysis of cracking causes of S32205 duplex stainless steel pipe and the improvement measures
The paper has focused on the cracking issue of S32205 duplex stainless steel pipe during the hydro-static pressure process at the project site,analysis and investigation were conducted from several aspects,inclu-ding macroscopic morphology observation,chemical composition determination,mechanical property test,pit-ting corrosion test,SEM morphology observation of fracture surfaces,metallographic analysis,etc.The findings re-vealed that the cracking was caused by foreign objects being rolled into the pipe matrix during the rolling process,which was not detected promptly,ultimately leading to the cracking during the hydrostatic test at the project site.The method of pipe replacement was adopted to solve this problem.
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