Description
Ultra Thin Steel Structure Fireproof Coating With Good Water Resistance
Water-based intumescent fire resistive coating Description:
Water-based intumescent fire resistive coating for steel structure
Ultra-thin steel structure fireproof coatings are specialized intumescent paint-like materials applied to the surface of steel structural members to provide fire resistance. These coatings expand and char when exposed to high temperatures, creating an insulating layer that protects the underlying steel from rapid heating and loss of structural integrity during a fire.
Key features of ultra-thin steel structure fireproof coatings:
Thinness:
These coatings are typically in the range of 0.5 to 3 mm thick, making them much thinner compared to traditional fire protection materials like thick cementitious or mineral fiber sprays.
The ultra-thin profile allows for more design flexibility, minimizes impact on building footprint, and maintains the aesthetic appeal of exposed structural steel.
Low Density:
Due to their thin application, ultra-thin fireproof coatings add minimal additional weight to the steel structure, which is crucial for high-rise buildings, long-span bridges, and other lightweight construction.
This reduces the need for costly reinforcements to the supporting structure.
High Thermal Efficiency:
The specialized formulations of these coatings provide excellent thermal insulation properties, shielding the steel from rapid heating during a fire.
This helps the steel maintain its structural integrity and load-bearing capacity for the required fire resistance duration.
| GT-NSP-Fp2.50-1C-HG Comparison of physical and chemical properties of fireproof coatings for indoor expanded steel structures | |||||
| No. | Physical and chemical properties | GB14907-2018 | Q/ HG001-2023 | Test report | Defect class |
| 1 | The state in the container | After stirring, it is in a uniform and fine state or a thick and thick fluid state, without agglomeration | Uniform and fine, no clumps | C | |
| 2 | Drying time (surface dry)/h | ≤12 | ≤8 | ≤5 | C |
| 3 | Initial drying resistance to cracking | Should not be cracks | No crack | C | |
| 4 | Bond strength /MPa | ≥0.15 | ≥0.20 | ≥0.39 | A |
| 5 | Compressive strength /MPa | C | |||
| 6 | Dry density /(kg/ m ³) | C | |||
| 7 | Thermal insulation efficiency deviation | ±15% | 一 | ||
| 8 | PH Value | ≥ 7 | ≥ 8.23 | C | |
| 9 | Water resistance | After 24h test, the coating should have no lamination, foaming, falling off phenomenon, and the heat insulation efficiency attenuation should be less than 35% | No layer, foaming, falling off phenomenon, heat insulation efficiency attenuation Less than or equal to 35% | A | |
| 10 | Resistance to hot and cold cycling | After 15 times tests, the coating should have no cracking, peeling, foaming phenomenon, and the heat insulation efficiency attenuation should be less than 35% | No cracking, peeling, foaming phenomenon, heat insulation efficiency attenuation Less than or equal to 35% | B | |
| Note 1:A is a fatal defect, B is a serious defect, C is a minor defect; - indicates that there is no requirement. Note 2: Thermal insulation efficiency deviation is only used as a factory inspection item. Note 3: pH value is only applicable to water-based steel structure fire retardant coatings. | |||||
| GT-NSP-Fp2.50-1C-HG, means indoor water-based expansion type ordinary steel structure fireproof coating, the fire resistance is Fp2.50, the coating thickness is 1.5mm Less than or equal to 2mm user-defined code HG. |
Key considerations when specifying ultra-thin steel structure fireproof coatings:
Fire resistance rating required (typically 30 min to 2 hours)
Compatibility with the steel surface preparation and painting system
Thermal and physical performance characteristics
Application methods and curing requirements
Maintenance and repair procedures
Evercross Steel Bridges Overview:
| EVERCROSS STEEL BRIDGE SPECIFICATION | |
| EVERCROSS STEEL BRIDGE | Bailey bridge (Compact-200, Compact-100, LSB, PB100, China-321, BSB) Modular bridge (GWD, Delta, 450-type, etc.), Truss Bridge, Warren bridge, Arch bridge, Plate bridge, Beam bridge, Box girder bridge, Suspension bridge, Cable-stayed bridge, Floating bridge, etc. |
| DESIGN SPANS | 10M TO 300M Single span |
| CARRIAGE WAY | SINGLE LANE, DOUBLE LANES, MULTILANE, WALKWAY, ETC |
| LOADING CAPACITY | AASHTO HL93.HS15-44, HS20-44, HS25-44, BS5400 HA+20HB, HA+30HB, AS5100 Truck-T44, IRC 70R Class A/B, NATO STANAG MLC80/MLC110. Truck-60T, Trailer-80/100Ton, etc. |
| STEEL GRADE | EN10025 S355JR S355J0/EN10219 S460J0/EN10113 S460N/BS4360 Grade 55C AS/NZS3678/3679/1163/Grade 350, ASTM A572/A572M GR50/GR65 GB1591 GB355B/C/D/460C, etc. |
| CERTIFICATES | ISO9001, ISO14001, ISO45001, EN1090, CIDB, COC, PVOC, SONCAP, etc. |
| WELDING | AWS D1.1/AWS D1.5 AS/NZS 1554 or equivalent |
| BOLTS | ISO898, AS/NZS1252, BS3692 or equivalent |
| GALVANIZATION CODE | ISO1461 AS/NZS 4680 ASTM-A123, BS1706 or equivalent |