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【简答题】
环管丙烯置换是用什么压力,置换几次,泄压至什么压力再充气,置换后在什么压力下保压,为什么
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答案
环管丙烯置换是用0.7MPaG,置换2次。泄压至火炬系统的背压再充气。置换后在1.0MPaG压下保压。防止液相丙烯进入环管后汽化,大量吸热,使垫片松动而造成环管泄漏,对正常开车不利。
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