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CIRCUMFERENTIAL WELDING JOINT OF MAIN PIPE, METHOD FOR FABRICATION OF CIRCUMFERENTIAL WELDING JOINT OF MAIN PIPE AND MAIN PIPE
CIRCUMFERENTIAL WELDING JOINT OF MAIN PIPE, METHOD FOR FABRICATION OF CIRCUMFERENTIAL WELDING JOINT OF MAIN PIPE AND MAIN PIPE
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机译：主管道的周向焊接接头，主管道和主管道的周向焊接接头的制造方法
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摘要
FIELD: technological processes.;SUBSTANCE: group of inventions relates to a circumferential welding, a process for its fabrication and to a main pipe. End parts of steel pipes with the yield strength according to API 5L specification not lower than 555 N / mm2 are joined together. The joined parts are welded together in circumferential direction. This welding is performed using the welded materials and under welding conditions selected from the provision of ensuring the critical equivalent plastic strain εp-cri (%) of formation of viscous crack in the heat-affected zone of the base material, conforming to the formula σmatch4,85εp-cri-0,31, where σmatch - welding strength ratio which is determined according to the expression: σmatch=(TS-w/TS-b)⋅(YS-w/YS-b), where TS-w - tensile strength of the weld metal , TS-b - tensile strength of the base material, YS-w - yield strength of the weld metal, YS-b - yield strength of the base material, while the relation YS-w/YS-b≥1,0 is fair.;EFFECT: document describes the process of circular welded joints, as well as the use of this method of connection to the main pipe.;5 cl, 1 dwg, 1 tbl, 7 ex
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机译：技术领域：组发明涉及一种圆周焊接，其制造方法以及一种主管。将符合API 5L规范的屈服强度不低于555 N / mm 2 的钢管端部连接在一起。接合部分在周向上焊接在一起。这种焊接是使用焊接材料进行的，且焊接条件选自确保在热影响区中形成粘性裂纹的临界等效塑性应变ε p-cri （％）。基础材料，符合公式σ match p-cri -0,31 ，其中σ match -根据以下表达式确定的焊接强度比：σ match =（TS-w / TS-b）⋅（YS-w / YS-b），其中TS-w-拉伸焊接金属的强度，TS-b-基材的拉伸强度，YS-w-焊接金属的屈服强度，YS-b-基材的屈服强度，而关系YS-w /YS-b≥ 1,0是公平的;效果：文件描述了圆形焊接接头的过程以及这种与主管连接的方法的使用。; 5 cl，1 dwg，1 tbl，7 ex
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