某气体公司发生一起充装二氧化碳的37Mn钢无缝钢瓶破裂爆炸事故。通过现场勘察与宏观分析、壁厚测量、化学成分分析、力学性能测试、金相检验、断口分析等方法，分析了钢瓶破裂爆炸的原因。结果表明：该钢瓶瓶体内壁发生了应力腐蚀开裂，在内部压力和搬运过程中的碰撞及振动作用下，钢瓶承压能力不足，最终导致钢瓶发生了物理破裂爆炸。最后，根据失效原因提出了相应的预防措施。

A rupture explosion accident of a 37Mn seamless steel cylinder occurred in a gas company. Through the site investigation and macro analysis, wall thickness measurement, chemical composition analysis, mechanical property testing, metallographic examination, fracture analysis and so on, the reasons for the rupture explosion of the steel cylinder were analyzed. The results show that:the stress corrosion cracking happened on the inner wall of the steel cylinder; under the action of internal pressure together with the collision and vibration during the transport process, the pressure bearing capacity of the steel cylinder was insufficient, and finally the physical rupture explosion happened to the steel cylinder. Finally, the preventive measures were put forward according to the failure reasons.