Thank you LittleInch, mk3223, georgeverghese for your replies. I will sum up here -
1. Refractory lining thickness inside the fired heater may be increased in order to reduce heat loss through heater wall.
2. Outside insulation of fired heater to reduce heat loss is not recommended because it...
Thanks LittleInch and Compositepro for your replies. The quaestion of outside insulation on fired heaters arose for the purpose of energy saving by reducing heat loss to atomsphere through the heater wall. Even after refractory is applied inside the heater walls, skin temperature of a fired...
Why there is no outside insulation on fired heaters shell/box ? One of my colleague asked me this question and I was wondering why. Can anybody explain ?