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密封焊缝
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  相似匹配句对
     Sealing Membraneis
     密封
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     Leather Cup Seals
     皮碗密封
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     Ultrasonic Testing of Welds
     焊缝的超声波检测
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     Follow the tracks of Welding Seam Voluntarily Technology
     焊缝自动跟踪技术
短句来源
     Cause and Remedy for Cracks in Weld Seams of Reheater Sealing Plate of Wall Type for 350 MW Power Generating Set Boiler
     350MW机组锅炉墙式再热器密封焊缝裂纹原因分析及改进方法
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  seal weld
Completing the seal weld as shown in Figure 32 requires very little additional time but greatly improves the corrosion resistance of the pad.
      
Figure 30 shows a full seal weld at the top and bottom of the tray support angle.
      
It takes very little more time to complete the seal weld as shown in Figure 14-20 which should Figure 14-24 Vertical beams.
      
The seal weld is accomplished using the TIG welding process.
      
The seal weld quality requirements are set in Table 12.
      


The Vacuum chamber of the Separated Sector Cyclotron for Heavy IonResearch Facility Lanzhou to have been built is described. It is a large monolithicultra-high vacuum vessel with 10 m in diameter and 4.5 m high, weighing 65 tn.The total volume is about 100 m~3. There are 234 ports on it for various purpose. The mechanical analysis of the vacuum chamber is completed using a finiteelement method by means of the procedure SAP-5 C on a computer. Uddholm 316 L super-low carbon stainless steel made in Sweden was selectedas...

The Vacuum chamber of the Separated Sector Cyclotron for Heavy IonResearch Facility Lanzhou to have been built is described. It is a large monolithicultra-high vacuum vessel with 10 m in diameter and 4.5 m high, weighing 65 tn.The total volume is about 100 m~3. There are 234 ports on it for various purpose. The mechanical analysis of the vacuum chamber is completed using a finiteelement method by means of the procedure SAP-5 C on a computer. Uddholm 316 L super-low carbon stainless steel made in Sweden was selectedas a structure material. Because of very big size, the monolithic vacuum chamber is divided intoeight bigger and several smaller pieces to fabricate in the factory. Then it istransported by a train and a truck to our institute. Finally it is welded as asingle vessel and machined in situ. In the interests of economy. The manualelectric arc welding is the best choice in our case. It is paid great attention tostrict technological process during welding. Owing to high requirements for ultra-high vacuum, all of tight welded seams are inspected and checked by liquidpenetration testing, X-ray examination and helium mass spectrometer detecting.All of the flanges are machined before welding as far as possible at the factory.Some big flanges are cut by special way in situ. The pressure of 8×10~(-6) Pa for sufficient beam transmission in the vacuumchamber is abtained in September of 1986.

已建成的兰州重离子加速器的真空室是一个大型整体结构的超高真空容器,直径约10m,高4.5m,重65000kg,内表面积211m~2,容积100m~3,工作真空度为5×10~(-5)Pa。采用有限单元法在计算机上用SAP-5C程序对真空室受力分析进行了计算。真空室结构材料选用瑞典Uddeholm钢厂生产的316 L 超低碳不锈钢。承制此大型容器的是航天工业部风华机器厂。由于结构庞大,首先将真空室分成八大块和几小块在工厂制造,然后运至现场焊制成一整体容器并进行机械加工。所有密封焊缝均用着色渗透液,X-射线探伤和氦质谱探漏仪进行检查和探漏。

Installation of reproduced drum expanders of gas pipelines during pro-duction in Benxi Iron and Steel Company is described. Fabrication and installation methods are presented.Structurally unique canal seal weld and complete installation procedures were adopted.Construction safety has been assured.

介绍了本钢不停产安装再造煤气管道鼓形膨胀器的实践,并对制造、安装方法进行了叙述,特别是在结构上采用了独特的构槽密封焊缝和完整的安装程序,保证了实施的安全。

 
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