Ethylene Cracker Ethylene Cracker norzul (Mechanical) (OP) 24 Mar 15 10:50 Anyone knows about ethylene cracker? RE: Ethylene Cracker Compositepro (Chemical) 24 Mar 15 18:35 That is a really poor (lazy) question. Try again. RE: Ethylene Cracker pennpiper (Mechanical) 24 Mar 15 19:54 norzul, Just typing in the words 'ethylene cracker' and you get 352,000 hits for information including these: http://www.alleghenyfront.org/story/frequently-ask... https://www.google.com/search?q=ethylene+cracker&a... Sometimes its possible to do all the right things and still get bad results RE: Ethylene Cracker georgeverghese (Chemical) 26 Mar 15 00:31 What exactly do you want to know ? Is it about gas crackers or naphtha based crackers ? RE: Ethylene Cracker norzul (Mechanical) (OP) 31 Mar 15 01:00 George, it's about cracking naphta...do you have experience designing/operating the facilities without spare heater. Our design capacity is 1.1 million tpa with original 7 heatears. However, we plan to remove one spare heater due to cost cutting iniatative.. RE: Ethylene Cracker georgeverghese (Chemical) 31 Mar 15 01:35 My experience in the design of these is on the cracked gas processing side for naphtha crackers. However, it is well known that fired heaters for cracking naphtha or gas are in very severe thermal and cycling service. So if you lose the spare, actual annual production will drop when one of the heaters is on maintenance (very likely) and there is no spare. So then you can only commit less production to your customers. Though I agree that the fired heater is a high capital cost item. Some one in your organisation can estimate whether the net gain in production by keeping the spare can offset the increased cost of the fired heater over the life of the heater ? RE: Ethylene Cracker weldstan (Materials) 31 Mar 15 19:11 If you haven't a well drawn maintenance (tube replacement) program and the heaters are not operated within the design paameters, you will lose production.