摘要
Abstract
In this article,combined with CNOOC Nanhai Liwan 3-1 submarine gas pipeline project,it studied and analyzed tensile strength,yield strength,yield ratio and elongation of high grade submarine pipe with heavy wall thickness through tests. The results showed that both longitudinal and transverse,the tensile strength and the average value of elongation of plate specimen both are higher than those of round bar specimen,while the width variation of the transverse plate specimen slightly affects its tensile strength,the average value of the upper and lower surface tensile strength both are higher than those of the wall thickness center,for different width plate specimen,the bigger the width is,the greater elongation ratio after fracture is, and little variation of percentage elongation after fracture of small size round bar specimen for different wall thickness location. The yield strength and yield ratio of longitudinal plate specimen are higher than those of round bar specimen,the yield strength and yield ratio of transverse plate specimen are lower than those of round bar specimen,and the yield strength and yield ratio of the wall thickness upper and lower surface are higher than those of the average value of wall thickness center.关键词
焊管/高钢级厚壁海管/拉伸性能/抗拉强度/屈服强度/屈强比/延伸率Key words
welded pipe/high grade submarine pipeline with heavy wall thickness/tensile property/tensile strength/yield strength/yield ratio/elongation ratio分类
能源科技
