σmatch4.85εp-cri−0.31 (1)YS-w/YS-b≧1.0 (2)"/>
Circumferential welded joint of line pipe, method of forming circumferential welded joint of line pipe, and line pipe
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Circumferential welded joint of line pipe, method of forming circumferential welded joint of line pipe, and line pipe
Circumferential welded joint of line pipe, method of forming circumferential welded joint of line pipe, and line pipe
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机译：管路的周向焊接接头，管路的周向焊接接头的形成方法以及管路
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摘要
A circumferential welded joint of a line pipe is formed by butting against each other end portions of steel pipes having a yield strength according to 5L Specification of API Standards not smaller than 555 N/mm2 and welding the butted portions in a circumferential direction. A joint strength ratio σmatch=(TS-w/TS-b)·(YS-w/YS-b) represented by a product of a ratio between a tensile strength TS-w of a weld metal and a tensile strength TS-b of a base material and a ratio between a yield strength YS-w of the weld metal and a yield strength YS-b of the base material, and a critical equivalent plastic strain εp-cri [%] for ductile crack generation in a base material heat affected zone satisfy Equation (1), and the yield strengths YS-w, YS-b of the weld metal and base material satisfy Equation (2).σmatch4.85εp-cri−0.31 (1)YS-w/YS-b≧1.0 (2)
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机译：根据API标准的5L规格不小于555 N / mm 2 的屈服强度，将钢管的两端彼此对接，从而形成管线的圆周焊接接头，并将对接焊接沿圆周方向的部分。接头强度比σ match =（TS-w / TS-b）·（YS-w / YS-b）用焊缝的拉伸强度TS-w之比乘积表示金属和基材的抗拉强度TS-b，以及焊接金属的屈服强度YS-w和基材的屈服强度YS-b之比，以及临界等效塑性应变ε>对于基材热影响区中的延性裂纹产生的cri [％]满足公式（1），焊接金属和基材的屈服强度YS-w，YS-b满足公式（2）。<？in-line-formulae description =“在线表达式” end =“ lead”？>σ match p-cri −0.31 < / Sup>（1）<？in-line-formulae description =“行内公式” end =“ tail”？> <？in-line-formulae description =“行内公式” end =“ lead”？> YS- w / YS- b ≥1.0（2）<？in-line-formulae description =“ In-line Formulae” end =“ tail”？>
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