After 5 years in service a stay bar at the rear end of the boiler failed catastrophically. Upon closer inspection cracks were detected on most of the stay bar joints on the rear end side. Figure 1: Schematic of typical stoker fired fire tube boiler. An investigation was requested to determine the root cause for failure of the stay bar.
Home » Boiler Tube Failure. Access the Boiler Tube Failure Handbook. How to Use the Handbook. The visual appearance of a failed boiler or HRSG tube provides valuable information regarding the mechanism of failure. Determining the failure mechanism is the first step of the failure reduction/elimination process. The process includes the ...
Cost of boiler tube failures 9/4/2013 Steag O&M Company 7 The cost of boiler tube failures is comprised of three main components; the cost of the repair, the cost of start up oil to return unit to service, and the cost of lost production. A rule of thumb for repair costs of 200000 per day out of service+ cost of material
Whatever the type of fuel being fired, all high pressure boilers are bound to have a tube failure during the course of their working life. Did you know that a single tube failure in a 500 MW boiler requiring four days of repair work can result in a loss of more than $1,000,000 apart from the generation loss?
A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or (many) more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.
encompassed both fire-tube and water-tube boilers with a further subdivision of water tube boilers into sugar and non-sugar boilers. Although there are only a limited number of fire-tube boilers in use in the sugar industry it was felt that seriousness of the failure mechanisms warrants their inclusion in this paper. The statistics
In order to determine the cause of a transgranular failure, it is necessary to study both the design and the operating conditions of the boiler. Straight tube, shell-and-tube waste heat boilers frequently develop tube and tube sheet failures due to the imposition of unequal stresses.
Boiler Tube Failure Handbook Filter Items by: ... (Firetube boiler) Waterside of firetube boiler: Acid Attack: ID pitting with corrosion tubercles ... Fire/Gas Side ...
Failure analysis of the boiler water-wall tube is presented in this work. In order to examine the causes of failure, various techniques including visual inspection, chemical analysis, optical microscopy, scanning electron microscopy and energy dispersive spectroscopy were carried out.