... contractors,including ABB Lummus Global, KBR,Linde,Stone and Webster(a Shaw Group Company),and Technip offer cracking furnace technology. ABB ... guarantee high outlet of olefinc hydrocarbons.Two cracking furnaces may share a common stack, and the height of the heater may vary ... the 1960s,cracking tubes were rranged in horizontal rows in a radiant chamber,leading to low ethylene capcity(20,000 mta ...