When choosing a steam boiler, safety is absolutely paramount. Let me help you break down the key points so you can make a clear and informed choice.
Core Safety Principle: Compliance is the Bottom Line
Safety is the primary prerequisite; compliant products must be selected.
Key Selection Steps
Clarify Needs and Compliance:
Distinguish Between Boilers and Steam Generators: Pressurized steam boilers with a normal water volume ≥30L and a rated steam pressure ≥0.1MPa are classified as special equipment and are subject to strict regulation. If the water volume is <30L or the pressure is <0.1MPa, it is classified as a steam generator, and regulation is relatively more lenient.
Determine Parameters: Choose based on steam usage requirements (such as pressure and evaporation rate) to avoid excessively high parameters that increase risk and cost.
Strictly Screen Manufacturers and Suppliers:
Qualification Review:Choose manufacturers with a Class A or Class B boiler manufacturing license (determine the qualification level based on the rated evaporation rate). Avoid "three-no" products (products without a license, manufacturer, or production date).
Inspection Requirements: Products must pass the supervision and inspection of the National Special Equipment Inspection Agency and obtain a "Boiler Supervision and Inspection Certificate".
Key Safety Accessories and Protective Devices to be Checked:
Safety Valves: Two valves must be provided (one for operation and one for standby). The opening pressure should be ≤ 1.04 times the design pressure, and they must be within their valid calibration period.
Pressure Gauges: The measuring range should be 1.5-3 times the working pressure, with an accuracy of not less than 1.6 grade, and equipped with a water trap.
Water Level Gauges: Two sets are required for drum boilers (e.g., glass tube type and plate type), equipped with high and low water level alarm devices, capable of immediately shutting down the boiler in case of water shortage.
Consideration of Fuel Type and Energy Efficiency:
Natural Gas: Clean and highly efficient, but dependent on pipelines; costs are affected by gas prices.
Diesel/Heavy Oil: No pipeline required, highly mobile, but highly polluting and expensive.
Biomass: Low cost and renewable, but requires storage space and faces stringent environmental requirements.
Electricity: Zero emissions and simple operation, but extremely high operating costs.
