Galvanized steel fire sprinkler pipe

Galvanized steel fire sprinkler pipes, often referred to as GI (Galvanized Iron) fire pipes, are carbon steel pipes coated with a zinc layer to enhance corrosion resistance, designed specifically for fire protection systems like wet, dry, preaction, and deluge sprinkler systems. ASTM A795, a key standard for these pipes, specifies both black and hot-dip galvanized welded (ERW) and seamless steel pipes for fire fighting applications, available in Grades A and B, with Grade B being more common due to its mandatory post-weld heat treatment (minimum 1000°F or 540°C). The galvanization process involves dipping the steel pipe in molten zinc, creating a protective coating of at least 1.5 oz/ft² (0.46 kg/m²), which shields the pipe from rust in moist environments, per ASTM A795 requirements.