GT-WSF-Ft Special Outdoor Non-Intumescent Fireproof Coating for Steel Structure

Overview
Special outdoor non-intumescent fireproof coating designed for hydrocarbon flames, forming a fire-resistant thermal insulation protective layer on outdoor steel structures.​
The document states it does not corrode steel, does not chemically react with anti-corrosion primers, has no irritating odor, produces no smoke during fire exposure, and does not release harmful gases.​
The document states the product performance meets or exceeds GB 14907-2018 (Steel Structure Fireproof Coatings).​

Composition
Lightweight thermal insulation materials, refractory cement, and refractory flame-retardant materials (composite).​

Typical uses

• Fire protection of outdoor steel structures in petrochemical refining and chemical enterprises where hydrocarbon flame resistance is required.​

Technical data (typical)

• Color: Gray.​

• Gloss: Matt (no gloss).​

• Density / specific gravity: 0.4 kg/L.​

• Shelf life: 12 months (shown in the physical data table).​

• Packaging: 20 kg/bag.​

• Coating theoretical (fire resistance requirement → thickness → number of coats → theoretical consumption): 3 h → ≥33 mm → 5–6 coats → 20–22 kg/m²; 2 h → ≥24 mm → 3–4 coats → 15–17 kg/m²; 1 h → ≥16 mm → 2–3 coats → 10–12 kg/m².​

• Key test results (as listed): bond strength 0.11 (MPa shown in the standard requirement column); heat resistance 720 h attenuation 8%; damp heat 504 h attenuation 7%; freeze-thaw 15 cycles attenuation 2%; acid resistance 360 h attenuation 6%; alkali resistance 360 h attenuation 1%; salt spray (30 cycles) attenuation 5%; UV radiation (60 cycles) attenuation 6%; fire test: measured thickness 33 mm, steel beam span 5400 mm, test time 3.00 h, max deflection 29.59 mm, average temperature 521.31°C.​

Application data (25°C)

• Thinner: Water.​

• Application methods: Air spray and trowel application are stated.​

• Spray equipment (as listed): continuous air supply pressure 0.6–0.8 MPa; spray gun nozzle diameter Φ4.0–6.0 mm.​

• Wet mix usable time (as stated): wet material must be used within 2 h (given in the interface layer / trowel mixing notes).​

• Trowel application control (as stated): each pass thickness 6–8 mm; interval about 24 h between passes.​

• Mixing ratio: coating : water : binder is referenced for spray and trowel application (numeric values are not shown in the provided table cells).​

Surface preparation

• Prior to blasting: grind welds, remove welding spatter and burrs, and round sharp edges.​

• Blast cleaning to Sa 2.5, or power-tool cleaning to St 3 to ensure steel is fully exposed and free of mill scale/oxide scale.​

• Apply coating within 5 h after surface preparation (as stated).​

• Apply at least two coats of anti-corrosion primer first; apply the fireproof coating after the anti-corrosion primer is dry.​

System compatibility / packing / storage

• The document states no chemical reaction with anti-corrosion primers.​

• After the coating is thoroughly dry, two coats of decorative topcoat (tintable) may be applied to improve service life and appearance (as stated).​

• Storage: sealed, stored off the ground in a ventilated and dry place without direct sunlight; prevent moisture and rain ingress; storage temperature 5–35°C.​

• Shelf life: 9 months (stated in the storage section).​

• Packaging: 20 kg/bag.