Cable fireproof coating, flame retardant and high temperature resistant expansion type steel structure cable surface protective paint

Description :

  Cable fireproof coating is a special functional coating specifically designed for the surface of power cables, communication cables, and various types of cables. It mainly solves the problem of cable flame propagation in high-temperature environments and prevents the spread of fire along the line. This coating has stable physical and chemical properties at room temperature, and can quickly expand and foam when exposed to fire, forming a dense and hard carbonized insulation layer, effectively isolating oxygen and reducing substrate temperature, thereby protecting the cable insulation layer from burning out and ensuring that critical circuits can maintain normal operation for a certain period of time in the early stages of a fire. It is suitable for working environments with extremely high fire safety requirements, such as power plants, substations, tunnels, high-rise buildings, and underground facilities.

  The cable fire retardant coating is usually composed of flame retardant, carbon forming agent, foaming agent, synthetic resin lotion and other components, and the executive standards refer to GB 28374-2012 Cable Fire Retardant Coating or relevant industry specifications. Typical technical parameters include: drying schedule ≤ 4 hours, actual operation ≤ 24 hours; Adhesive strength ≥ 0.6MPa; Water resistance ≥ 7 days without peeling or detachment; Oil resistance for ≥ 7 days without peeling or detachment; In terms of fire resistance, when the coating thickness reaches about 1mm, the fire resistance time can usually reach more than 60 minutes, depending on the construction thickness and environment. The appearance of the product is mostly white or gray fluid, with a fineness of ≤ 90 μ m and a flexibility usually ≤ 5mm, ensuring that the coating does not crack or peel off when the cable is bent or vibrated, and adapting to complex on-site installation conditions.

  When selecting cable fire-resistant coatings, it is necessary to clearly distinguish the applicable scenarios of expandable and non expandable products. The expansion type cable fireproof coating has a thin coating and good decorative properties, suitable for indoor exposed cable laying and places with aesthetic requirements; Non expanding (thick) coatings have longer insulation performance, but the coating is thicker and is often used for concealed works or areas that are not sensitive to weight. If the working conditions involve strong corrosion, strong ultraviolet radiation, or long-term immersion in water, specialized models with corresponding weather resistance or modification should be selected. In addition, attention should be paid to the compatibility between the coating and the cable sheath material to avoid chemical reactions that may cause aging of the insulation layer. For the renovation of existing old coatings, it is necessary to first remove loose parts and polish them to ensure the adhesion of the new coating.

  Before applying fire-resistant coating to cables, it is necessary to thoroughly remove dust, oil stains, and rust from the surface of the cables, and keep the base surface dry and clean. Brush coating, spray coating, or roller coating can be used for construction. It is recommended to apply multiple coats to achieve the specified thickness, and the interval between each coat should be after the previous coat has dried. The total thickness is generally controlled between 0.8-1.2mm. In daily maintenance, the coating should be regularly inspected for mechanical damage, cracking, or detachment, especially in stress concentration areas such as cable joints and bends. Damaged items should be repaired promptly to prevent damage to fire safety integrity. When storing, it should be placed in a cool, dry, and ventilated place, avoiding direct sunlight and freezing. After opening, it should be used up as soon as possible. Unused paint should be sealed and stored to prevent peeling and failure.

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