1前言用乙炔作燃气进行火焰切割是一种传统的钢材切割方法；近二十年来，随着石油工业的发展，工业发达国家已使用丙烷这种质优廉价的气体进行火焰切割，其经济效益十分明显。为了掌握并推广应用该项切割技术，1995年在大庆油田南一油库新增10万m3储量工程建设中，我们采用氧一 1 Foreword Flame cutting with acetylene gas is a traditional method of steel cutting. In the recent two decades, with the development of oil industry, industrialized countries have used propane, a kind of high quality and cheap gas for flame cutting, and its economic benefits Very obvious. In order to grasp and promote the use of the cutting technology, in 1995 in Daqing Oilfield Nanyi Oil Depot new 100,000 m3 reserve construction, we use oxygen a