What type of boiler uses Stay Bolts?

Stay bolts are structural components used to provide additional support within certain types of boilers. Firetube boilers rely on stay bolts to maintain their integrity because these bolts help support the thin walls of the firetubes against the pressure of the steam or water within the boiler. In firetube boilers, the combustion gases pass through tubes surrounded by water, and as the pressure builds, the stay bolts ensure that the boiler maintains its shape and can withstand the forces acting on it.

In contrast, water tube boilers typically feature water-filled tubes under pressure and do not generally employ stay bolts for structural support. Electric boilers operate using electric elements rather than combustion processes, and thus do not utilize stay bolts. Steam boilers are a broader category that can include both firetube and water tube designs, and the use of stay bolts specifically applies to the construction of firetube designs within that group. Therefore, the association of stay bolts with firetube boilers highlights their role in maintaining the safety and structural integrity of this boiler type.