Technical Documents

Thermally Induced Stress Cycling (Thermal Shock) in Firetube Boilers

The problem of thermally induced stress cycling (loosely referred to as thermal shock) has been apparent for many years, particularly in boilers installed in hot-water heating systems. The term "shock" suggests a sudden impact type failure....

Comparison of Fatigue Assessment Techniques for Heat Recovery Steam Generators
In the past several years the cyclic nature of Heat Recovery Steam Generators, HRSG’s, has increased dramatically. There are many methods for evaluating cyclic service. Several methods for evaluating cycle life are compared for their use on HRSG’s.

Deaerator Performance Testing ... A Guideline
The deaerator test procedure should be agreed on by all parties prior to selection of the system or the procedure should be defined in the system specifications. The test procedure should ....

The Packaged Commercial Watertube Boiler
Since its initial design in the latter half of the Eighteenth Century, the Watertube boiler has undergone a myriad of changes, all of which were essentially driven by the demand for higher capabilities ....

Why Packaged Firetube Boilers?
The 1930’s saw the boiler industry in a period of transition. Earlier units had relied mainly on solid fuels such as coal. The 1930’s were the beginning of a period of

Historical Advancement of Fire-Side Heating Surface in Firetube Boilers
The purpose of this presentation is to discuss design development, over the past 50 years, of horizontal steel fire-tube boilers, specifically relating to reduction in boiler fire-side heating surface per Boiler Horsepower. It is emphasized that only horizontal steel fire-tube boilers are discussed herein and that parallel logic to the design of other types of boilers should not be drawn.

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