Abstract : a manufacture method of a major diameter circline weldless u - expansion joint by hydrostratic forming is introduced , a calculation formula of loading with hydrostratic forming is given by stress analysis 文摘:简要介绍了液压成型大直径无环焊缝u形膨胀节的方法，通过应力分析，给出了液压成型的加载内压计算公式。
