Large Ammonia Plant High-temperature Furnace Tube Burst Pipe Failure Analysis

Along with the modern industry rapid development, is day by day widespread in the petrochemical plant high temperature furnace tube application, moreover its structure develops unceasingly to the complication direction, its working conditions are more and more complex, the operating condition is increasingly bad, therefore the high temperature furnace tube security reliability has more and more received the widespread value.The high temperature furnace tube locates the working conditions are most complex, the operating condition is worst. Therefore the high temperature furnace tube is very easy to have the cartridge igniter expiration. Not only the high temperature furnace tube cartridge igniter expires brings the serious economic loss for the production unit, simultaneously returns to give back to the user to bring many inconveniently, more serious is also has the possibility to endanger the people the life and the property security. Because of so, in domestic and foreign, did to the high temperature furnace tube cartridge igniter expiration analysis has very worked, also has obtained the anticipated effect. But, at present analyzes the majority of limitations to the high temperature furnace tube expiration in analyzes the expiration reason from qualitative or the semi-quantitative aspect, is short from the quota aspect carries on the analysis, discovers its expiration the reason.This article take expires the analysis as a foundation, has discussed some Large Scale Ammonia Plant 102-B operation heating furnace furnace tube cartridge igniter expiration analysis and the 101-BU high pressure auxiliary pot C group of furnace tube cartridge igniter accident expiration analysis reason, and carries on repair processing to it. Applied the macroscopic test, the ingredient analysis, mechanics performance test and metallography analysis, fracture methods and so on appearance analysis has discussed the high temperature furnace tube cartridge igniter accident expiration analysis reason.In addition, the present paper has analyzed the high temperature furnace tube expiration reason from the high temperature furnace tube stress aspect, and discussed heating furnace furnace tube remaining life estimate several algorithms, thinks the L-M estimate method relatively good, not only it is suitable in the new furnace tube life appraised, but also may calculate the refinery or the chemical plant heating furnace furnace tube extent of damage and...