New Products

Hot-Dip Galvanized Double-Ended Bolts

Hot-dip galvanized double-ended bolts are used in outdoor flange connections, pipe supports, sewage treatment equipment, bridge expansion joints, and offshore platforms—areas requiring regular maintenance and prone to severe corrosion. These hot-dip galvanized double-ended bolts screw into the threaded hole of the base material at one end, and lock the other end with a hot-dip galvanized nut. Their double-ended structure facilitates disassembly without damaging the base material threads. In petrochemical pipe racks, water treatment tank covers, and valve flanges in coastal power plants, hot-dip galvanized double-ended bolts can withstand long-term corrosion from water mist, acidic gases, and chloride ions. Because the threads at both ends of the double-ended bolt are exposed, ordinary surface treatments quickly fail; hot-dip galvanized double-ended bolts, with their thick and uniform coating, are the preferred solution.

Product Description

Hot-dip galvanized double-ended bolts are used in outdoor flange connections, pipe supports, sewage treatment equipment, bridge expansion joints, and offshore platforms—areas requiring regular maintenance and prone to severe corrosion. These hot-dip galvanized double-ended bolts screw into the threaded hole of the base material at one end, and lock the other end with a hot-dip galvanized nut. Their double-ended structure facilitates disassembly without damaging the base material threads. In petrochemical pipe racks, water treatment tank covers, and valve flanges in coastal power plants, hot-dip galvanized double-ended bolts can withstand long-term corrosion from water mist, acidic gases, and chloride ions. Because the threads at both ends of the double-ended bolt are exposed, ordinary surface treatments quickly fail; hot-dip galvanized double-ended bolts , with their thick and uniform coating, are the preferred solution.

Product Feature

Uniform Protection Across the Entire Surface: A continuous and dense zinc layer is applied to both ends of the threaded section and the smooth shank, eliminating weak points in the coating. Stricter control over the coating thickness at the threaded areas ensures a secure fit.

Resistance to chloride ion penetration: The hot-dip galvanized layer forms a stable zinc hydroxide passivation film in concrete or humid environments, exhibiting strong resistance to chloride ion corrosion, making it suitable for coastal and de-icing salt environments.

Suitable for high temperatures and temperature variations: The zinc-iron alloy layer has a high melting point, and the coating will not crack or peel off within a temperature range of -40℃ to 200℃, making it suitable for applications with large temperature differences, such as solar thermal power generation and flue gas desulfurization.