The welding of high pressure boiler longitudinal weld shall be electric slag welding which may be replaced by improved auto-submerged arc welding when have no electric slag welding.

• 高压锅炉锅筒纵缝焊接时,采用的焊接设备为电渣焊。在不具备电渣焊的情况下用改进的埋弧自动焊成功的替代了电渣焊。