窄间隙焊接是厚板焊接领域的一项先进技术。与普通坡口的埋弧焊相比，窄间隙焊具有无可比拟的优越性。如坡口窄、焊缝金属填充量少，可以节省大量的焊材和焊接工时；由于窄间隙焊时热输入量较低，使焊缝金属和热影响区的组织明显细化，从而提高其力学性能，特别是塑性和韧性。
研制了适合水平直焊缝和水平圆形焊缝的窄间隙埋弧焊专用焊机。
A special design of narrow gap SAW machine is developed in order to weld straight and circular joints at flat position.
采用先进的双丝窄间隙埋弧焊设备和专用焊接工艺，成功地焊接了大厚壁高压蓄势器，质量检查全部合格。
An advanced double wires narrow gap SAW technique, equipment and special procedure have been used to weld high pressure storage tanks successfully with high quality welding joints.
介绍了窄间隙焊的特点，对坡口形式的确定、埋弧焊剂的筛选、焊接工艺参数的选择进行了详细分析。
Introduces the feature of the narrow gap welding, and analyses how to determine the form of groove, screen out submerged-arc welding flux and choose welding condition in detail.
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