Understand the heat-transfer arrangement
In water-tube boilers, water flows inside tubes heated externally by combustion gases. In fire-tube boilers, combustion gases pass through tubes surrounded by water. These arrangements influence water content, pressure capability and maintenance access.
Compare the actual project requirement
Capacity is one input. Pressure, load variation, footprint, installation limits, water treatment, inspection requirements and total auxiliary scope should be reviewed together. The supplied catalog includes water-tube steam families up to 200 t/h and fire-tube steam families up to 30 t/h.
Request a comparable quotation
Use one technical duty sheet for all suppliers. Ask each to disclose efficiency test conditions, fuel basis, emission reference conditions, dimensions, operating weight and included equipment. Comparisons are meaningful only when the design basis matches.