大开孔整体补强三通设计计算问题

A design calculation problem for integrate reinforced straight tee in major tapping

摘要: 结合在执行SY0518-92《油气管道钢制对焊管件设计规定》中出现的问题及设计经验, 提出加快设计速度保证设计质量应注意的问题: （1）焊缝系数大小的取值方法。（2）增量Δ₁、Δ₂的取值方法。（3）削弱系数η的计算方法。

Abstract: Combined with problems found in execution of SY 0518-92 "Design Regulations for Butt Welding Steel Fittings in Oil & Gas Pipeline" and design experience, puts forward that following attention shall be paid to in speeding design and ensure design quality; (1) value taking method of weld coefficient; (2) value taking method of increment Δ₁ and Δ₂; (3) weakening calculation problem of factor η.