But for medium thickness pipe DWTT, it usually converse fraction of figure transforming much in break part, and make specimen failure.
但是中厚壁钢管DWTT试验经常产生解理断裂部分塑性变形大的逆向断口，使试样无效。
The results show that the flow field can be adjusted and the thickness of boundary layer can be decreased with the porous medium so the heat transfer can be enhanced in the pipe.
结果表明，可调节的流场和边界层的厚度，可降低与多孔介质的热传递，因此可以提高在管道中。
The following factors having effect on pipe toughness are analysed: line pipe strength and design level, pipe thickness and diameter, medium transported, locations in pipe environmental impact, etc.
管道韧性设计受多方面因素的影响，分别分析了管道钢的强度及设计水平、管壁厚度、管径、输送介质、钢管的不同部位、环境条件等相关的影响因素。
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