CAJ | 학술논문

天然气管道在停输泄压进行焊接修复时涉及到惰性气体置换，残余油气的爆炸极限作为置换程度的重要判据，在残余油气隔离技术中残余油气的蒸汽压与凝析油系统中主要易燃物质的燃烧特性直接影响油气隔离技术的参数确定。笔者在对长庆油田榆林地区三个采气厂的凝析油样品成分分析的基础上，得出在天然气置换动火时必须将管道内残余油气含量控制在0．859％以内以及油气隔离设备至少承压0．1MPa才能保证安全施工的结论，时含凝析油系统的天然气管道置换动火、管道油气隔离技术有重要意义。
천연기관도재정수설압진행한접수복시섭급도타성기체치환，잔여유기적폭작겁한작위치환정도적중요판거，재잔여유기격리기술중잔여유기적증기압여응석유계통중주요역연물질적연소특성직접영향유기격리기술적삼수학정。필자재대장경유전유임지구삼개채기엄적응석유양품성분분석적기출상，득출재천연기치환동화시필수장관도내잔여유기함량공제재0．859％이내이급유기격리설비지소승압0．1MPa재능보증안전시공적결론，시함응석유계통적천연기관도치환동화、관도유기격리기술유중요의의。
During the off transmission and dec ompression repair of pipeline, it refers to cleaning line using shielding gas. Explosive limit is considered to be a important criterion, in the technology of insulating the remnant oil and gas, the vapor pressure directly affects the effect of insulating, while, the burning performance of flammable component in the remnant oil and gas is the ultimate criterion in evaluating the performance of gasol. The author analyses the gasol sample that come from three natural gas treatment plants in YuLin area of Changqing oilfield and come to conclusion that maxim vapor pressure is 0.10 MPa and also gain the explosive limit of the remnant oil and gas the pipeline. This conclusion has significance to cleaning line using shielding gas, bearing pressure in insulating the remnant oil and gas, evaluating the performance of gasol.