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This product is made of glass fiber reinforced materials and inorganic materials through laminating processing. The product has the characteristics of fire resistance, oil resistance, water resistance, corrosion resistance, and good mechanical strength at high temperatures. During construction, it can be cut and reprocessed as required to provide good fire protection for the through holes. Among them, the fireproof bridge/slot box is an important substitute for steel bridges in important circuits and production plants with anti-corrosion requirements.

This product is mainly composed of a metal shell and a thermal expansion core material, which is sleeved on the wall of the UPVC pipe during installation and fixed on the floor or wall. When a fire occurs, the core material of the firestop ring expands sharply after being heated, and squeezes the plastic pipe wall inward to block the hole in a short time and play a role in preventing the fire from spreading. The product has compact structure, reasonable design, safe and convenient construction.