Amajorenergyconservationandretrofittingproject—ap-plicationofnaturalgasassupplementaryfuelforsteamcrackershasbeensuccessfullyputintooperationstartingApril30,2008attheSINOPECYangziPetrochemicalCompany.Foralongtimethesteamcrackersintheoldandnewplant-sitesattheYangziPetrochemicalCo.usedtoconsumemeth-