What is a fire tube steam boiler?
A fire tube steam boiler is a boiler where the combustion gases from the burner are channeled through tubes that are surrounded by the fluid to be heated. The boiler body is the pressure vessel and contains the fluid. In most cases, this fluid is water that will circulate for heating purposes or become steam for use in processing.
Each set of tubes through which the combustion gas passes, before making a turn, is considered a "step". Consequently, a three-step boiler will have three sets of pipes with the outlet located at the rear of the boiler.
-
DZL series coal-fired steam boilerLive Chat2-10 t/h1-2.5 MPa
-
WNS series gas-fired (oil-fired) steam boilerLive Chat1-20 t/h0.7-2 MPa
-
DZL series biomass-fired steam boilerLive Chat2-10 t/h1-2.5 MPa
-
Email us
-
WhatsApp: +86 18861589035
WeChat: +86 13506150756
Live Chat

-
Chemical manufacturing operates under extraordinary constraints where process precision, safety protocols, and regulatory compliance converge. Steam boilers provide the temperature control essential for polymerization, condensation, drying, melting, and molding processes that define chemical production. When leading chemical enterprises select thermal equipment suppliers, they prioritize manufacturers demonstrating proven international standards through rigorous certification. ZOZEN Boiler has e...23 Dec 2025 -
Paper manufacturing stands at a critical juncture where environmental responsibility intersects with operational efficiency. The industry's energy-intensive processes—pulping, pressing, drying, calendering—consume substantial thermal resources, with energy costs comprising 10% to 14% of total production expenses. For paper mills seeking sustainable heating solutions, selecting the Best Biomass Boiler Supplier becomes a strategic decision influencing both environmental compliance...23 Dec 2025 -
As Hubei’s manufacturing industry accelerates its green, low‑carbon transformation, high‑efficiency, safe and eco‑friendly thermal systems have become a key driver of enterprise upgrades. Leveraging system‑level solutions in gas‑fired thermal oil boilers, gas‑fired steam boilers, and biomass boilers, ZOZEN Boiler has recently delivered a series of landmark projects in Xianning, Huangshi, and Jingzhou. The services span health foods, prepared food processing, building materials, and solid‑w...23 Dec 2025











