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氣爆三可能原因 管線厚度不足、挖破、腐蝕
Aug 2nd 2014, 19:01

化工專家表示,管線厚度不足、被挖破和腐蝕是造成高雄大氣爆的三個可能原因。

化工專家表示,一般以為高風險的石化管線必須定期做檢測,但高雄市這些地下石化管線都不「年輕」,且一般定期檢測不容易做,也不見得做得確實;例如高雄地下石化管線很長、屬於大系統,做壓力測試檢漏時,即使有小洩漏也測不出來。

專家說,就算把管線的丙烯都排空做壓力測試,持續壓力五分鐘和五小時的結果可能大不同,如果採前項定檢作法,就算有斷續的小洩漏點也是「無感」,但以高雄災區現場的四吋(約十公分)丙烯管線為例,只要有一、兩公分破洞,洩漏的丙烯量就足以造成這次災害規模。

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