Description

Key Features:

(This product has Fire Ratings of AB, with Label A affixed to the packaging container. Label B is available upon request from our company.) KD-NSP-Fp-SB-3 is an indoor expanding water-based fireproof coating for steel structures, developed by our company. Its fire resistance and physicochemical properties surpass the requirements stipulated in the GB14907-2018 standard for indoor expanding fireproof coatings for steel structures. This environmentally friendly solution can be widely used for fire protection in indoor steel structures.

Detailed Description:

KD-NSP-Fp-SB-3 is an indoor expanding water-based fireproof coating for steel structures, developed by our company. Its fire resistance and physicochemical properties surpass the requirements stipulated in the GB14907-2018 standard for indoor expanding fireproof coatings for steel structures. This environmentally friendly solution can be widely used for fire protection in indoor steel structures.

Substrate Treatment and Application Methods:

(I) Substrate Treatment

1. Surface treatment of steel structures is essential to ensure the durability of the fireproof coating. Based on the substrate type, the surface should undergo the following treatments:a. For New General Steel Structures:
   • Sandblasting and rust removal on the steel structure surface, followed by the application of a compatible anti-rust and anti-corrosion coating. We recommend using an epoxy zinc-rich primer followed by an epoxy cloud iron intermediate coat system.

   b. For Galvanized Steel Structures:

   • To ensure good adhesion with the fireproof coating, it is necessary to use an epoxy coating transition paint after surface treatment.

   c. For Existing Steel Structures or Existing Primed Surfaces:

   • If the primer is undamaged and the surface is clean, check for compatibility between the fireproof coating and the primer. If there is no primer or the primer is significantly damaged, it must be repainted after rust removal.
2. Before commencing the application, thoroughly inspect the steel components for rust protection coating, dust, and oil residues. Check for cracks and inadequate welding. Only proceed when no issues are found.
3. Steel components that have not undergone rust protection treatment must be treated accordingly (usually, this step is the responsibility of the user).

(II) Application of Fireproof Coating

1. Open the packaging container on-site and use an electric agitator until uniform consistency is achieved. If the coating is too thick, add a small amount of neutral water, but do not exceed 5% of the coating volume.
2. It is recommended to use a spray application for this coating. Apply the coating horizontally and vertically, alternating between coats until a uniform and smooth finish is achieved.
3. Requirements for temperature and humidity during application: Apply the coating between 5°C and 35°C with a relative humidity of ≤80%. High humidity or low temperatures can extend drying time and reduce coating adhesion and other performance attributes.
4. The coating should be applied in layers. The thickness of each layer should be adjusted based on environmental conditions and temperature. Typically, the first layer should be less than 2mm, and subsequent layers should be approximately 1-2mm thick until the design thickness is reached.
5. Under normal temperature conditions, there should be at least a 12-hour interval between each layer of application. For higher or lower temperatures, the interval can be adjusted accordingly. The interval is determined by the time it takes for the coating’s surface to have a certain hardness when touched by hand.
6. For enhanced fire resistance and stability of key areas in the steel structure, it is recommended to use high-strength fiberglass cloth during the application process. When the coating reaches approximately 2-2.5mm (dry film thickness), wrap the fiberglass cloth around the structure. Ensure a 5-10cm overlap between the cloth pieces and use a trowel to press and secure the cloth along one direction. Ensure that there are no hollow areas and proceed to the next layer of application.
7. When using a spray gun, it should be held vertically to the steel components at a distance of 0.2-0.5 meters. Maintain an air pressure of 0.6-0.8MPa, and ensure that the spray gun nozzle has a diameter of no less than 4mm.
8. The coating should be applied in a way that ensures complete enclosure.
9. For local repairs and small-area applications, manual trowel application can be used.
10. High humidity, low gas flow, or low steel temperatures can lead to condensation on the steel, resulting in poor coating adhesion, cracking, peeling, or delamination.

Precautions:

1. During construction, the building should be enclosed, and the coating should be protected from rain, soaking, and exposure. For prolonged usage in a semi-enclosed state, a high-performance topcoat is recommended.
2. The coating should be thoroughly mixed before spraying. If the coating thickens during use, a small amount of neutral water can be added and mixed before continuing.
3. To improve the fire resistance of critical areas in steel structures, it is recommended to use fiberglass cloth during the application process.
4. Gaps at the junction of the top plate and steel beams, as well as lattice joint gaps, should be sealed with the coating.
5. The coating must not be stored at temperatures below 0°C during transport, and it should be stored at temperatures above 5°C.
6. The coating should not be mixed with other components, and it should not be mixed with other coatings.
7. Areas not requiring coating should be covered, and the coated areas should be protected from rain and direct sunlight.
8. After completing the application, tools and equipment should be cleaned promptly.
9. Ensure safety precautions are taken during the application.

(Translation Note: In some cases, portions of the text are repetitive, so the translation tries to maintain clarity while avoiding redundancy.)