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Detailed Introduction:
Introducing our GT-NSF-Fp-STI-A indoor non-intumescent steel structure fire retardant paint – a cutting-edge water-based solution developed by our company. Exceeding the fire resistance and physical and chemical properties outlined in the GB14907-2018 standard for indoor non-expanding steel structures, this coating sets a new benchmark for structural fire protection. With its environmentally conscious formulation, it aligns with green initiatives while offering unmatched performance in safeguarding indoor steel structures.
Main Feature:
Our GT-NSF-Fp-STI-A indoor non-intumescent steel structure fire retardant coating is a testament to our commitment to excellence. Developed as a water-based, non-expanding solution, it outperforms the requirements set by the GB14907-2018 standard for structural fire retardant coatings. Its green and environmentally friendlycomposition ensures both safety and sustainability, making it the ideal choice for fire protection of indoor steel structures.
Base treatment and construction methods:
1. Substrate treatment:
1.1 Surface treatment of steel structures is the basic condition to ensure the durability of fire retardant coatings. According to different base materials, the surface treatment of steel structures should be as follows:
1.1.1 Surface of new ordinary steel structure
After the steel structure surface is sandblasted and derusted, a matching anti-rust and anti-corrosion coating is applied. It is recommended to use an epoxy zinc-rich primer + epoxy mica iron intermediate paint system.
1.1.2 Galvanized steel surface
In order to ensure good bonding performance with fire retardant coatings, epoxy coating transition paint must be used before construction.
1.1.3 Old steel structure or old primer surface
If the primer is not damaged and the surface is clean, check the compatibility of the fire retardant coating and the primer; if there is no primer or the primer is seriously damaged, the anti-corrosion coating must be removed and repainted before construction.
1.2 Before construction, thoroughly check whether the steel parts are painted with anti-rust paint, whether there is dust, oil stains, and rust spots, and check whether the steel beams and columns have cracks and improper welding. Construction can begin only after the inspection shows that there are no problems.
1.3 Steel parts that have not been rust-proofed must be rust-proofed (this process is generally the responsibility of the user).
2. Ground floor construction:
Coating construction requires bottom layer reinforcement
The main reinforcement methods are as follows:
2.1 Welding hanging net
Welding steel rod
2.1.1 Welding steel rod: The steel rod can be bent into an "L" shape with a No. 4 lead wire or a steel rod with a diameter of 4 mm, with a height of about 4cm, and welded to the steel component. The distance between top, bottom and left and right is about 40cm.
2.1.2 When welding steel rods, pay attention to the welding of the inner and outer corners of the steel structure.
Hanging net:
① First, cut the expanded steel mesh into a reasonable length based on the actual situation of the steel structure on site.
② When hanging the net, pay attention to the pressing at the inner and outer corners of the steel structure, and do not raise it too much. Generally, the distance between the expanded steel mesh and the steel structure is 8~15mm.
2.1.3 Pay attention to the overlap of expanded steel mesh. Generally, the overlap length is more than 30mm.
2.2 Nail hanging net
Sticky nails
401 glue and ordinary cement can be mixed and bonded in a ratio of 1:1; two-component universal glue can also be used for bonding; or EVA707 glue and ordinary cement can be mixed and bonded in a ratio of 1:1. The distance between the insulation nails is about 20~30cm up and down, left and right. At the same time, when gluing insulation nails, pay attention to the bonding of the inner and outer corners of the steel structure.
Hanging net is the same as "welding hanging net"
2.3 Directly connect to the network
Lead wire mesh can also be used to reinforce the coating of the column. After the bottom layer of the steel structure is constructed and processed, lead wire mesh is added when the coating reaches about 10mm. The lead wire mesh is cut to an appropriate width according to the diameter (width) of the steel structure, usually 10cm. Overlap and tie with fire wire to fix.
3. Construction of fire retardant coating:
3.1 First floor construction
Coating ratio: STI-A powder: matching glue = 1:1. After accurately weighing, add appropriate amount of water and stir evenly (the amount of water added during batching can be determined according to the on-site construction conditions to facilitate construction).
Application method: Spraying, the coating thickness is 3~4mm, and the surface is pitted. The next process can be carried out after the coating has been cured for 24 hours.
3.2 Other coating construction
3.2.1 Ratio: STI-A powder: rubber = 4~5:1. Add the weighed fire retardant coating powder, rubber and appropriate amount of water to the mixer (the amount of water added during batching can be determined according to the on-site construction The situation is determined to facilitate construction), and the construction can be carried out after sufficient mixing for 5 to 8 minutes.
3.2.2 Construction of fire retardant coating
The fire retardant coating can be applied by spraying with a squeeze mortar pump, spraying with a self-weight spray gun or applying by hand.
3.2.3 Spraying construction essentials:
① Fire retardant coatings need to be sprayed in layers. The thickness of each spraying depends on the construction environment and temperature. Generally, the thickness of each layer is 6~8mm. After the coating is basically dry, spray a second time until the required thickness is reached.
② When the thickness of the fireproof coating is 12~15mm, wrap a high-strength steel wire mesh with an overlap of 5-10cm. After adding the mesh, use a spatula to compact the mesh in one direction, paying attention to the pressure at the corners and joints. Reality. Steel wire mesh fixation can be carried out by welding fixation, insulation nail fixation, lead wire fixation, etc.
When the fire retardant coating is 27~30mm thick, wrap it with a high-strength fiberglass cloth, and overlap the mesh by 5-10cm. After adding the mesh, use a spatula to compact the mesh in one direction, paying attention to the corners and joints. Reality.
③When spraying, the spray gun should be perpendicular to the steel part to be sprayed, the distance is preferably 0.5~0.6 meters, the air pressure should be maintained at 0.6~0.8MPa, and the diameter of the spray gun mouth should be 8~12mm (if a self-weight spray gun is used, the diameter of the gun mouth should be 6-8mm) .
④Use a trowel to wipe the corners that cannot be sprayed until the required thickness is reached. During the spraying process, master the spraying distance and angle to minimize rebound. Clean floor paint should be cleaned and recycled in time, and can be re-mixed and used (it should not be used after half an hour).
4. Applying construction essentials:
4.1 The construction is usually divided into four layers according to the designed thickness: the thickness of the first layer should be thin, generally ≤5mm. When the surface is 70% to 80% dry, apply the second layer. When the surface is 70% to 80% dry, apply the third layer. layer, wait until the surface is 70% to 80% dry, then apply the fourth layer, and apply the fourth layer to the designed thickness.
4.2 Pay attention to compaction when applying, and the coating surface should not be smooth, but can be made into a rough surface, which is beneficial to the bonding of the upper and lower layers.
4.3 It can be laid on the ground in the smear construction area.
4.4 The screening method is the same as the requirements for screen hanging in spraying construction.
Construction Notes:
1. Fire-retardant coatings must be protected from rain and moisture during transportation and storage. Fire-retardant coatings must not be used when they solidify and agglomerate.
2. The mixed paint should be used up within 30 minutes each time. If it thickens during use, add a small amount of water and stir evenly.
3. The construction parts need to be covered, and the coating should be protected from rainwater after construction.
4. After the construction is completed, clean the equipment and tools with water.
5. The coating temperature should be above 5℃.
6. Beams and columns should be prevented from strong vibration and collision within one week after coating application.
Detailed Introduction:
Introducing our GT-NSF-Fp-STI-A indoor non-intumescent steel structure fire retardant paint – a cutting-edge water-based solution developed by our company. Exceeding the fire resistance and physical and chemical properties outlined in the GB14907-2018 standard for indoor non-expanding steel structures, this coating sets a new benchmark for structural fire protection. With its environmentally conscious formulation, it aligns with green initiatives while offering unmatched performance in safeguarding indoor steel structures.
Main Feature:
Our GT-NSF-Fp-STI-A indoor non-intumescent steel structure fire retardant coating is a testament to our commitment to excellence. Developed as a water-based, non-expanding solution, it outperforms the requirements set by the GB14907-2018 standard for structural fire retardant coatings. Its green and environmentally friendlycomposition ensures both safety and sustainability, making it the ideal choice for fire protection of indoor steel structures.
Base treatment and construction methods:
1. Substrate treatment:
1.1 Surface treatment of steel structures is the basic condition to ensure the durability of fire retardant coatings. According to different base materials, the surface treatment of steel structures should be as follows:
1.1.1 Surface of new ordinary steel structure
After the steel structure surface is sandblasted and derusted, a matching anti-rust and anti-corrosion coating is applied. It is recommended to use an epoxy zinc-rich primer + epoxy mica iron intermediate paint system.
1.1.2 Galvanized steel surface
In order to ensure good bonding performance with fire retardant coatings, epoxy coating transition paint must be used before construction.
1.1.3 Old steel structure or old primer surface
If the primer is not damaged and the surface is clean, check the compatibility of the fire retardant coating and the primer; if there is no primer or the primer is seriously damaged, the anti-corrosion coating must be removed and repainted before construction.
1.2 Before construction, thoroughly check whether the steel parts are painted with anti-rust paint, whether there is dust, oil stains, and rust spots, and check whether the steel beams and columns have cracks and improper welding. Construction can begin only after the inspection shows that there are no problems.
1.3 Steel parts that have not been rust-proofed must be rust-proofed (this process is generally the responsibility of the user).
2. Ground floor construction:
Coating construction requires bottom layer reinforcement
The main reinforcement methods are as follows:
2.1 Welding hanging net
Welding steel rod
2.1.1 Welding steel rod: The steel rod can be bent into an "L" shape with a No. 4 lead wire or a steel rod with a diameter of 4 mm, with a height of about 4cm, and welded to the steel component. The distance between top, bottom and left and right is about 40cm.
2.1.2 When welding steel rods, pay attention to the welding of the inner and outer corners of the steel structure.
Hanging net:
① First, cut the expanded steel mesh into a reasonable length based on the actual situation of the steel structure on site.
② When hanging the net, pay attention to the pressing at the inner and outer corners of the steel structure, and do not raise it too much. Generally, the distance between the expanded steel mesh and the steel structure is 8~15mm.
2.1.3 Pay attention to the overlap of expanded steel mesh. Generally, the overlap length is more than 30mm.
2.2 Nail hanging net
Sticky nails
401 glue and ordinary cement can be mixed and bonded in a ratio of 1:1; two-component universal glue can also be used for bonding; or EVA707 glue and ordinary cement can be mixed and bonded in a ratio of 1:1. The distance between the insulation nails is about 20~30cm up and down, left and right. At the same time, when gluing insulation nails, pay attention to the bonding of the inner and outer corners of the steel structure.
Hanging net is the same as "welding hanging net"
2.3 Directly connect to the network
Lead wire mesh can also be used to reinforce the coating of the column. After the bottom layer of the steel structure is constructed and processed, lead wire mesh is added when the coating reaches about 10mm. The lead wire mesh is cut to an appropriate width according to the diameter (width) of the steel structure, usually 10cm. Overlap and tie with fire wire to fix.
3. Construction of fire retardant coating:
3.1 First floor construction
Coating ratio: STI-A powder: matching glue = 1:1. After accurately weighing, add appropriate amount of water and stir evenly (the amount of water added during batching can be determined according to the on-site construction conditions to facilitate construction).
Application method: Spraying, the coating thickness is 3~4mm, and the surface is pitted. The next process can be carried out after the coating has been cured for 24 hours.
3.2 Other coating construction
3.2.1 Ratio: STI-A powder: rubber = 4~5:1. Add the weighed fire retardant coating powder, rubber and appropriate amount of water to the mixer (the amount of water added during batching can be determined according to the on-site construction The situation is determined to facilitate construction), and the construction can be carried out after sufficient mixing for 5 to 8 minutes.
3.2.2 Construction of fire retardant coating
The fire retardant coating can be applied by spraying with a squeeze mortar pump, spraying with a self-weight spray gun or applying by hand.
3.2.3 Spraying construction essentials:
① Fire retardant coatings need to be sprayed in layers. The thickness of each spraying depends on the construction environment and temperature. Generally, the thickness of each layer is 6~8mm. After the coating is basically dry, spray a second time until the required thickness is reached.
② When the thickness of the fireproof coating is 12~15mm, wrap a high-strength steel wire mesh with an overlap of 5-10cm. After adding the mesh, use a spatula to compact the mesh in one direction, paying attention to the pressure at the corners and joints. Reality. Steel wire mesh fixation can be carried out by welding fixation, insulation nail fixation, lead wire fixation, etc.
When the fire retardant coating is 27~30mm thick, wrap it with a high-strength fiberglass cloth, and overlap the mesh by 5-10cm. After adding the mesh, use a spatula to compact the mesh in one direction, paying attention to the corners and joints. Reality.
③When spraying, the spray gun should be perpendicular to the steel part to be sprayed, the distance is preferably 0.5~0.6 meters, the air pressure should be maintained at 0.6~0.8MPa, and the diameter of the spray gun mouth should be 8~12mm (if a self-weight spray gun is used, the diameter of the gun mouth should be 6-8mm) .
④Use a trowel to wipe the corners that cannot be sprayed until the required thickness is reached. During the spraying process, master the spraying distance and angle to minimize rebound. Clean floor paint should be cleaned and recycled in time, and can be re-mixed and used (it should not be used after half an hour).
4. Applying construction essentials:
4.1 The construction is usually divided into four layers according to the designed thickness: the thickness of the first layer should be thin, generally ≤5mm. When the surface is 70% to 80% dry, apply the second layer. When the surface is 70% to 80% dry, apply the third layer. layer, wait until the surface is 70% to 80% dry, then apply the fourth layer, and apply the fourth layer to the designed thickness.
4.2 Pay attention to compaction when applying, and the coating surface should not be smooth, but can be made into a rough surface, which is beneficial to the bonding of the upper and lower layers.
4.3 It can be laid on the ground in the smear construction area.
4.4 The screening method is the same as the requirements for screen hanging in spraying construction.
Construction Notes:
1. Fire-retardant coatings must be protected from rain and moisture during transportation and storage. Fire-retardant coatings must not be used when they solidify and agglomerate.
2. The mixed paint should be used up within 30 minutes each time. If it thickens during use, add a small amount of water and stir evenly.
3. The construction parts need to be covered, and the coating should be protected from rainwater after construction.
4. After the construction is completed, clean the equipment and tools with water.
5. The coating temperature should be above 5℃.
6. Beams and columns should be prevented from strong vibration and collision within one week after coating application.
