Pipeline long distance gas transport is not a safe way of energy transmission becausee there exist scale, distance, thickness effects and fatigue phenomenon (1-7). The risk R concept may be used to explain this conclusion. R=F·C (1)where F-accident frequency, C-accident consequences. Nowadays there are no data suggesting the reality of the Black Sea offshore pipeline operation (Russia-Turkey government's agreement, Jan. 1998 (8). Kosanda D. Showed (9) that fatigue short cracks rate V at the beginning of the start is high then it decreases sharply. Long length crack rate usually increases during gas pipeline operation.
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机译：管道长距离输气不是一种安全的能量传输方式，因为它存在水垢，距离，厚度效应和疲劳现象（1-7）。风险R概念可用于解释该结论。 R = F·C（1）
其中F事故发生频率，C事故后果。如今，没有数据表明黑海近海管道运营的现实（俄罗斯-土耳其政府的协议，1998年1月（8）。KosandaD.证明（9），开始时的疲劳短裂纹率V高。然后长管的开裂率通常会增加。
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