The following are the key points and comprehensive suggestions for the purchase of fire retardant coatings, which are explained in detail in combination with application scenarios, performance indicators and construction requirements:
Fire resistance limit
Prioritize the fire resistance limit data in the test report to ensure that the building code requirements are met. For example, the indoor walls of ordinary buildings must meet a fire resistance limit of ≥1 hour, while the load-bearing parts of steel structures may require ≥2 hours of protection.
Intumescent fire retardant coatings form an insulation layer through high-temperature expansion (acrylic acid expands 50 times, epoxy expands 5-20 times), which is suitable for general building steel structures; non-expanding coatings rely on their own refractory materials for flame retardancy, which is more suitable for long-term exposed tunnels or underground garages.
Flame resistance time and flame propagation
The flame resistance time of the first-level fire retardant coating is ≥20 minutes, and the second-level is ≥10 minutes. The performance is verified by tests such as the large plate combustion method and the tunnel combustion method.
Steel structure
Preferably choose intumescent fire retardant coatings (such as acrylic or epoxy. Epoxy coatings are suitable for hydrocarbon fire scenes (such as chemical plants), but require special equipment for construction.
Thick fire retardant coatings are suitable for long-term protection of load-bearing steel beams/columns.
Wood or decorative surface
Decorative fire retardant coatings are both decorative and fireproof, and are suitable for interior walls, ceilings and other areas.
Concrete structure
Choose non-intumescent or thick coatings to provide stable protection.
Environmental protection requirements
Choose products with low VOC and no harmful substances that meet national standards.
Construction conditions
Acrylic Acid paint can be sprayed with ordinary spray equipment, which is suitable for fast construction; epoxy paint requires a special two-component heating pump, which is more expensive.
Check the paint drying time, viscosity and other parameters to avoid construction difficulties.
Cost Control
The cost of secondary fire retardant paint is usually ≥8,000 yuan/ton. Too low a price may not meet the quality standards.
When the budget is limited, you can choose domestic high-cost brands (such as Champion paint.
Inspection certificate
The national fire protection product type approval certificate and test report must be checked.
Give priority to well-known brands.
On-site test
Observe whether it foams and expands through burning test. Inferior paint is easy to fall off or carbonize quickly.
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