Boiler stay: Difference between revisions

Where the shell of a boiler or other pressure vessel is made of cylindrical or (part) spherical elements, the internal pressure will be contained without distortion. However, flat surfaces of any significant size will distort under pressure, tending to bulge.<ref>{{cite book |title=Locomotive Management |last1=Hodgson |first1=Jas. T. |last2=Lake| first2=Chas. S. |year=1954 |edition=10^th10th |publisher=Tothill Press |location=London |page=77 }}</ref> Stays of various types are used to support these surfaces by tying them together to resist pressure. Some boiler configurations require a great deal of staying. A large [[locomotive boiler]] may require several thousand stays to support the [[Firebox (steam engine)|firebox]].