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1·Formula for calculating pipe diameter and lining thickness of pipelines with single lining.

单层衬里管道的管径及衬里厚度优化计算式。

2·The effects of corrosion rate, defect depth, thickness of pipe and operation pressure on pipeline reliability were investigated with this model.

利用这一模型，研究了腐蚀速率、缺陷深度、管道壁厚和工作压力等因素对管线可靠性的影响。

3·Thee invention relates to very precisely measuring changes in thickness of pipe walls to determine corrosion rate prior to any significant corrosion loss.

本发明涉及，在产生任何显着腐蚀损耗之前，非常精确地测量管壁厚度变化以确定腐蚀速率。

4·The connection strength increases with the increasing of bearizing rate of coupler and thickness of pipe wall, but decreases with the increasing of connection length.

管接头的连接强度随着扩孔率、管壁厚度的增加而升高，但随着连接长度的增大而降低；

5·The reason of thickness of pipe end increasing in tension reducing is analyzed. The principle and method of cutting end control (CEC) are introduced. The key problems are discussed.

分析了钢管在张力减径过程中产生管端增厚的原因，阐述了切头端控制(c.e.c)的原理、方法，并就其关键问题进行了探讨。

6·Unless otherwise specified, all Pacific valves will be supplied with butt weld ends conforming to ANSI B16.25 either Fig. 2(b) or 3(b) depending on the nominal pipe wall thickness of the valve wall.

除非另外指定，所有美国太平洋阀门都配置符合ANSI B16.25标准的对焊连接端口，并根据阀门壁厚和管道壁厚确定是属于型号2（b）或3（b）。

7·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。

8·Pipe sinking drawing is analysed using continuous speed field and the equations of wall thickness variations in sinking drawing established.

利用连续速度场分析了圆管空拔过程，建立了空拔壁厚变化量计算式。

9·It shows that pipe bending by using induction heating applied a counter torque can efficiently reduce the thinning ratio of pipe wall thickness.

计算结果表明：在转臂上施加一定的反向弯矩，能有效减小弯管的壁厚减薄率。

10·The wall thickness of metal corrugated pipe is very thin, that is the weakest link in the piping system.

金属波纹管的壁厚很薄，它是管道系统中的薄弱环节。