Recent Blogs
Boiler Tube Expander Mechanism Explained: How It Works, Parts, Diagram & Wall Reduction Formula
See how a mandrel and rollers expand a boiler tube into its tubesheet. Compare target rolled diameter and wall thickness from measured dimensions and a...
Marine Boiler: Water-Tube Circulation and Steam Energy Balance
Explore water-tube boiler circulation and estimate steady steam flow from measured fuel input, HHV-based efficiency and steam/feedwater enthalpy rise.
Cylindrical Double Flue Boiler Mechanism: How It Works, Parts, Formula and Industrial Uses Explained
Follow the Lancashire boiler’s twin furnace tubes and external gas passes. Estimate useful heat and steam flow from fuel energy, efficiency and enthalpy rise.
Submerged Head Vertical Boiler Mechanism: How It Works, Parts, Diagram and Uses Explained
See the submerged-head vertical boiler, its circulation diaphragm and clear centre. Explore flow area and mean water speed with a simplified calculator.
Serves Boiler Tube Mechanism: How Ribbed Fire-Tube Heat Transfer Works, Parts, Uses & Diagram
Explore the longitudinal ribs inside a Serve boiler tube. Compare selected bore area, rib dimensions, internal surface ratio and geometric hydraulic diameter.
Locomotive Boiler Mechanism: How It Works, Parts, Diagram, and Steam Calculator
Explore the gas, water and steam paths in a locomotive fire-tube boiler. Calculate fuel heat input, useful heat and reference equivalent evaporation.
Horizontal Tubular Boiler: Surface-Area Scenario Calculator | FIRGELLI
Explore horizontal tubular boiler geometry. Calculate tube and assumed half-shell area, with a separate entered evaporation-rate scenario rather than a boiler capacity rating.
Hanging Water Drum Boiler: Hiscox’s Connected-Drum Design | FIRGELLI
Understand Hiscox’s cylindrical boiler with a lower water drum connected by necks. Historical explanation only; no pressure, expansion or operating rating is supplied.
Eclipse Return Tubular Marine Boiler Mechanism: How It Works, Parts, Diagram & Evaporation Formula
Trace the Eclipse boiler’s direct and return gas passes. Calculate steam mass flow and heat output from measured heating surface, evaporation and enthalpy rise.
Automobile Boiler Mechanism Explained: Parts, Diagram, Pressure Calculator and Steam Car Uses
Explore a schematic steam-car coil generator and pressure-control band. The calculator does not provide boiler ratings, safety-valve settings or steam production.