pipe wall

Wax deposition of Xinjiang crude oil is investigated on a test loop and the following conclusion can be derived: the deposit coefficient decreases as the shear stress at the pipe wall increases incurred by the change of the temperature or velocity of tile flow.

通过对新疆的几种油样进行试验研究，结果表明，当温度或流速发生变化从而引起管壁剪切应力变化时，沉积系数随着管壁剪切应力的增大而减小。

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Extraction ratio adjustment on pipe wall sampler for two-phase flow metering

管壁取样器分流比例调节及两相流量测量

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In the paper, the strength of vertically laid pipeline is analyzed with the fourth strength theory, and the formula for the thickness of pipe wall is deduced, comparison with the similar formula is made and discussed.

通过垂直敷设管路受力分析，利用第四强度理论推导了垂直敷设管路壁厚计算公式。

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The coupler of Fe-Mn-Si-C alloys was developed and the influence of bearizing rate of coupler, connection length and thickness of pipe wall on the connection strength and pressure resistance was analyzed.

研制Fe-Mn-Si-C形状记忆合金管接头，并分析管接头扩孔率、连接长度、管壁厚度对连接强度及其耐压性能的影响。

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Research of Optimum Design of New Flowing Towards and Around Pipe Wall Throttling Device

新边壁绕流型节流装置优化设计研究

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The results showed that: axial capacity increases with strength grade of concrete, pipe wall thickness, the type and number of layers of FRP and self-stressing.

结果显示：轴压承载力随着混凝土强度等级、钢管壁厚、FRP层数以及自应力的增大而增大。

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The diameter of FRP cable protective pipes varies from 50 to 200 mm and the thickness of the pipe wall is from 2 to 12 mm.

玻璃钢电缆保护管直径d为（50~200）mm，管子壁厚t为（2~12）mm，变化范围很大。

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The model considers the forces acting on sliding bed in inclined pipe, shows approximate estimates of the pressure distribution and average concentration, and ignores shear stress between water lying in the clearance of solids and pipe wall in sliding bed.

该模型在考虑倾斜管道滑动床的受力情况的同时，对滑动床的压力分布、平均浓度作了一定程度近似估计，并且忽略了滑动床颗粒间隙中的水与管壁之间的剪切力。

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To determine extent of the effect of groundwater advection on U-type vertical underground heat exchangers, based on a mathematics model considering thermal conduction and groundwater advection, utilizes an overall solution to obtain the whole temperature field including fluid in pipe, pipe wall and surrounding soil.

为确定地下水渗流对U型地下埋管换热器的影响，基于热渗耦合作用下的数学模型，采用整体求解方法求得管内流体、地下埋管换热器及周围土壤的温度场数值解。

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Study on Simulation System of Bio-film Growing on Water Pipe Wall

研究供水管壁生物膜的模拟系统

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Some experiments were conducted in a flow loop to simulate the effects of a diesel stream on the wax deposits on the pipe wall during batch transport of waxy crude and refined petroleum products in a pipeline.

针对含蜡原油成品油在顺序输送中管壁上会产生蜡沉积物的问题，利用管流实验环道模拟了0号柴油对管壁处蜡沉积物的冲刷实验。

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Study of Temperature Influence on Pipe Wall Wax Deposit Law of High Pour Point Oil Product

温度对高凝成品油管壁结蜡规律影响的研究

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Calculation of the thickness of pipe wall in vertically laid pipe line and discussion

垂直敷设管路壁厚计算公式的推导与讨论

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This paper introduces a new wall protection method for drilling loose strata casing pipe wall protection.

本文介绍一种新的钻探松散地层护壁方法——套管护壁“三板斧”.

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Pipe wall electrostatic effect is often produced in the pipe of air-solid phase pneumatic conveying .

气 固两相流 管道中常发生管壁静电效应.

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Pipe wall's abrasion rate is one of pipeline's key designing parameters.

管壁磨蚀率是管道设计的重要依据之一。

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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；

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Both pressure wave speed and attenuation were measured under different disturbed frequency with pressure transducers mounted flush to the pipe wall. In the bubbly flow, the results show that both the pressure wave speed and attenuation have close relation with the disturbed frequency.

实验结果表明，对泡状流，在实验范围内，压力波的传播速度及其衰减跟扰动频率有关，随着扰动频率的增加，波速及其衰减都增加；

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Experimental results show that the MRR increases with the increase of peak discharge voltage, discharge pulse-on time, discharge peak current and gas pressure, but decreases with the increase of pulse-off time and thickness of pipe wall.

材料去除率随峰值电压、峰值电流、脉冲宽度、气体介质压力的增大而增大，随脉间宽度、工具电极壁厚的增大而减小。

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By using computer to calculate, we find the fluid flush on the curved pipe wall is also oscillatory.

本文还通过计算机计算，得知流体对弯管两侧的冲刷力也是振荡的。

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Be short of the primitive data, the thesis selected the method of Monte-Carlo to calculate the reliability of pipe wall.

文中选择Monte-Carlo方法作为在原始数据不充分的条件下计算管壁强度可靠度的优化算法并论述了该方法在可靠度计算中应用的可行性。

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Corrosion scales could form on the pipe wall that serving for long time. Drinking water can suffered from secondary pollution, and hygeian situation directly influences supply water quality.

服务年限长的供水管道内壁会形成腐蚀物，使饮用水受到二次污染，供水管道的卫生状况将直接影响水质。

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The evaporation model of micro heat pipe with triangular cross section was presented by analyzing both the heat transfer through the thin liquid film and the heat conduction along the heat pipe wall.

通过对薄液膜蒸发传热以及热管壁轴向导热的分析，对三角形截面微型热管的蒸发段建立了蒸发传热模型。

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