本文用双周数表计算了铜合金厚壁管空拔后的壁厚。
The wall thickness of thick wall copper tube drawn without plug is calculated by using Zhou-Zhou formula.
材质的成品管及特殊厚壁管18000吨，形成了产。
Finished pipe materials and special thick-walled tube 18000 tons, forming a middle class.
对厚壁管感应加热设备及热处理工艺进行了重新设计改造。
The induction heating equipment and heat treatment process of thick-wall pipe were reconstructed.
在单独使用或用于厚壁管焊接时，应选用低氢耐热钢焊条。
In a separate use or for the thick-walled tube welding, heat-resistant steel should use low hydrogen electrodes.
另本公司常求购各种规格积压库存管以及特殊规格厚壁管。
Another of the companies often purchase a variety of inventory backlog and the special requirements of the thick wall.
针对45钢冷拔厚壁管存在内表面横裂纹问题，分析了其产生的原因。
The causes of inner transversal crack of cold-draw heavy wall pipe of 45 steel were analyzed.
特殊设计可以拥有稳定的直径尺寸和圆整度，可以适合生产厚壁管的需要。
And the design can ensure the stability of diameter and roundness when producing the pipe with thick wall.
通过与已有文献的比较，得出的结论同时适用于内层管为薄壁管和厚壁管的情况。
The conclusions are applicable to the case where the inner tube is thin-walled or thick-walled in comparison with available literatures.
采用三转角轧制法轧制厚壁管和相反的操作法轧制薄壁管可消除喇叭口与尾三角。
The end trumpet and end triangle can be eliminated if a rolling process with three angles rotating is used for thick wall pipe rolling and other processes for thin wall pipe rolling.
在厚壁管、压力容器及电站锅炉的窄间隙全位置焊接中，钨极运动轨迹是动态的。
The synthesizing control scheme is put forward based on the requilement of narrow-gap all-position welding technology in terms of the moving track of tungsten electrode.
并介绍了与单半径孔型和双半径孔型比较，W成型的优点及在厚壁管生产中的应用实例。
Then, they introduced the advantages of W-bend forming and its application in thick-walled tube production.
本文介绍了厚壁管连接自动焊接机床的结构、组成、工作原理及设计中解决的几个主要问题。
The paper introduces the construction, constitute, and working principle of the automatic welding machines which are used in joining thick-walled pipes.
同时既能提供生产大口径、厚壁管所需的圆钢锭，又不需要对轧管穿孔机的辊型进行修改。
Simultaneously, round steel ingots which are used to produce pipes with large diameters and thick walls are provided without modifying roll shapes of rolling pipe piercers.
专业供应各种规格的不锈钢管，不锈钢方管，不锈钢无缝管，不锈钢镜面管，毛细管，厚壁管！
Our company specialize in various specifications of the stainless steel tube, stainless steel square tubes, stainless steel seamless tube, stainless steel mirror tube, capillary, thick wall pipe!
提出了一种浮动凹模芯模闭式镦粗法，以解决厚壁管在单向加压的普通液压机上进行闭式镦粗后壁厚不均的问题。
Using closed die upsetting process to manufacture thick wall tubes on normal hydraulic press may cause the dis uniformity of the thickness along the length of the tube.
在斜轧穿孔过程中，由于轧件旋进力克服不了顶头的阻力，因此轧制厚壁管或高合金钢管时在穿孔后期造成后轧卡。
In the cross piercing process, as the piercing precession power can not overcome the resistance force, it will lead to rear-jamming when rolling thick-wall tubes or high alloy tubes.
全位置自动焊接技术的特点是，焊丝可以连续送进，焊丝熔敷速度快，焊接质量较高，尤其适用于大口径、厚壁管的焊接。
This welding process, with continuous welding wire feeding, fast deposit speed and quality welding pass, is especially suitable for long distance pipeline with large diameter and thick wall.
最后分别分析了材料性质、截面长宽比、管长和壁厚对最终变形模式的影响。
Moreover, the influences of material property, section properties, tube length and thickness to ultimate deformation modes are studied respectively.
提出的管坯壁厚精度概念极其控制方法具有普遍性，对于其它薄壁筒形件的制造工艺具有参考作用。
The introduction of the concept of bellows wall thickness accuracy has the universal significance and reference value for manufacturing technology of other thin wall tube like products.
通过外观检验、壁厚测量、扫描电镜、能谱和X射线衍射，对省煤器管腐蚀原因进行了分析。
Through appearance inspection, wall thickness measurement, EDS analysis and X-ray diffraction, the corrosion cause of the coal economizer tube is analysed.
介绍了管端减壁控制时发生壁厚不均的原因及其防止措施和管端减壁的控制效果。
The causes of the wall eccentricity and its countermeasures as well as the effects of the end thinning control are covered.
分别用延迟温度报警法和实时温度报警法计算了厚壁身管火炮的报警温度，并对这两种方法进行了比较。
The alert temperature of gun tube was calculated by method of real-time temperature and method of delay-time temperature and the two methods were compared.
对椭圆断面厚壁螺旋管进行了强化传热和流体阻力实验研究。
The heat transfer enhancement and pressure drop of spiral tube with oval cross section and thick wall were investigated.
通过有限元模拟针对斜轧穿孔过程中毛管的变形特点，对其壁厚不均进行了计算。
Addressing deformation characteristics of the shell during rotary piercing operation, wall thickness unevenness is calculated by means of the FE simulation method.
并分析了缩径率、缩径凹模半锥角、摩擦系数、缩径管坯初始壁厚对管端翘曲和轴向伸长率的影响规律。
In addition, this paper presents how the diameter reducing rate, the die semicone angle, the friction coefficient and the original wall thickness influence the buckling and the axial elongation rate.
焊缝位置和壁厚差异变化时，拼焊管各区域的应力状态保持不变。
Weld-seam position and thickness difference do not affect stress and strain states.
焊管机组在线矫平机是焊管生产线的主要设备之一，为了确保高强度、大直径、厚壁焊管生产的顺利进行，矫平机的性能十分重要。
Online Flattener is main equipment of welded pipe unit, the property of Flattener is very important to ensure production of welded pipe with larger wall thickness going well.
CT主要表现有软组织肿块、十二指肠肠壁局限性增厚和共同管、胆总管和胰管扩张等。
Ct features included masses of soft tissue, localized thickening of duodenal wall and expansion of common duct, common bile duct and pancreatic duct.
CT主要表现有软组织肿块、十二指肠肠壁局限性增厚和共同管、胆总管和胰管扩张等。
Ct features included masses of soft tissue, localized thickening of duodenal wall and expansion of common duct, common bile duct and pancreatic duct.
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