Because TIG welded joints without filler wire always hold low strength and poor formation, tungsten inert gas welding process with filler wire is inevitable.
由于镁合金不填丝的TIG焊接接头强度低，焊缝表面成型不好，所以，镁合金的填丝tig焊接方法不可避免。
Expansion joints of various kinds are fitted on gas mains.
各种各样的伸缩接头被安装在煤气的总管道上了。
To ensure a secure connection, many types of threaded joints are made up to specific torque requirements in oil- and gas-well applications.
在油气井作业中为了确保牢固地连接，许多种类的螺纹接头都被上紧至特定的转矩要求。
The hardness of welded joints obtained by double-wire submerged arc welding is significantly better than that obtained by CO2 gas shielded. The peak hardness appears in the heat affected zone.
CO2气体保护焊接头的硬度值明显较双丝埋弧焊接头的硬度值高，硬度值在热影响区出现峰值。
This process showed a stable arc, good welding joints without any gas pores and cracks.
焊接过程电弧稳定，焊接接头熔合良好，未见裂纹、 未焊透、夹渣、气孔等缺陷。
The welding quality of field-welded girth joints of long-distance oil and gas transmission pipelines is the key to the quality and service life of pipelines.
油气长输管线现场环焊缝接头的焊接质量是决定管线质量、寿命的最根本要素。
The result show that there was very high welding residual stress on the welding joints and their adjacent area in the gas side.
结果表明，气侧焊缝区与近焊缝区存在很高的焊接残余应力。
13 accident, technical conditions of the tank car in the accident, design and calculation of the unloading joints, and safe unloading of the residual liquefied gas on the tank car in the accident.
介绍了“七一三”事故的概况、事故罐车的技术状态、卸车接头的设计计算及将事故罐车残留的液化石油气安全卸出的情况，并对目前正在使用的液化石油气罐车的各类安全附件存在的问题提出了修改建议。
The furnace, U-beam separator, and superheater enclosures are constructed entirely of top-supported, gas-tight, all-welded membraned tube walls which do not require hot expansion joints.
炉膛、U型钢分离器，以及过热器的外壳由顶部支撑、气密、全焊接的膜式管墙构成，因此不需要膨胀节。
The furnace, U-beam separator, and superheater enclosures are constructed entirely of top-supported, gas-tight, all-welded membraned tube walls which do not require hot expansion joints.
炉膛、U型钢分离器，以及过热器的外壳由顶部支撑、气密、全焊接的膜式管墙构成，因此不需要膨胀节。
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