Develop ment and Application of UOE Welded Pipe for Service und er Acidic Conditions

Briefed in the article are the activities for development of the UOE welded pipe for acidic condition service as performed by Baoshan Iron & Steel Co.,Ltd..According to the major technical requirements for the said company’s UOE welded pipe typical specification and in representative steel grade,the main aspects of such pipes with different specifications are also elaborated,including the process path scheme,product chemical composition,control of inclusion and segregation control,and rolling process for the steel plate blank,as well as the mechanical properties of the UOE pipe and the application situation.It is regarded via the analysis that the UOE welded pipe has high dimensional accuracy,excellent mechanical properties,and HICand SSCCresistances,and has been satisfactory to relevant customer operation requirements due to taking such measures as properly designing of the chemical composition,strictly controlling non-metallic inclusions and central segregation,making the steel plate blanks(including coil strip)with TMCP rolling process,and properly controlling the compression ratio and expansion rate to reduce and homogenizing residual stress in the pipe-making process.