引言为保障特殊用途,某大型舰船设计装有高压供氧系统。该系统管路介质为高压高纯氧气,因此对管路内壁光滑程度要求很高,如果管路内存在毛刺、焊瘤、尖锐突起物时容易摩擦产生较大热量甚至发生“打火”;管路内壁附着油脂易与高压氧气发生燃烧反应,因此对管路脱脂要求很高;管路安装在可能出现冲击、振动的环境中,对管路连接处的密封可靠性要求较高。在对国内外高压供氧管路广泛调研和比较的基础上,考虑到厚壁黄铜管的焊接性能 INTRODUCTION For the protection of special uses, a large ship is designed with a high pressure oxygen supply system. The system of pipeline medium is high pressure and high purity oxygen, so the inner wall of the pipeline requires a high degree of smoothness, if burrs exist in the pipeline, welding knobs and sharp protrusions are easy to generate friction and generate more heat or even “fire” ; Pipe wall grease adhesion easily with high pressure oxygen combustion reaction occurs, so the pipe degreasing demanding; pipe installed in the possible impact, vibration of the environment, the pipeline connection at the sealing reliability requirements. On the basis of extensive research and comparison of high pressure oxygen supply pipelines at home and abroad, taking into account the welding performance of thick-walled brass