Firefighting water supply, firefighting equipment

Fire hydrant 1. Fire elevator lobby.. 2. Fire pump room with Class II fire resistance rating, fire water tank room floor thickness 15mm, partition wall with 2-hour fire resistance, Class A fire door.. High-rise buildings over 100 meters must be equipped with automatic sprinkler systems.. When pipeline length exceeds 45 meters, 4. Junction boxes shall be installed during assembly. For deep well fire pumps, remove the plug to automatically drain excess grease. For oil-lubricated pumps, drain oil to the correct level. Diesel-powered fire pumps are categorized into different types based on classification methods. With their fully sealed, leak-free, and corrosion-resistant characteristics, they are widely used in environmental protection, water treatment, and firefighting sectors for pumping various liquids. They are ideal pumps for creating leak-free, pollution-free workshops and factories. The pump types used in firefighting systems are similar, differing only in head and flow rate. For fire pump automatic inspection cabinets with volute pumps, the centerline of the impeller outlet—defined as the midline of the outlet width—must align with the volute inlet centerline. If misalignment occurs, adjust by inserting shims between the impeller hub and shaft shoulder. Maintain a tolerance of no more than 0.5 mm between the two centerlines. For pumps with high specific speed, slight misalignment has minimal impact on performance. However, for pumps with medium to low specific speed, where the impeller outlet is narrow (e.g., only 10 mm wide), even a 1 mm deviation from the volute centerline significantly affects fire pump performance. It is recommended to control the misalignment error between the two centerlines (impeller and volute) within 5% of the impeller outlet width after adjustment. 5. Pipes penetrating fire water tanks and shear walls shall incorporate water jackets. Vibration pipes require flexible joints. Connections to water tanks must be welded. Reserve a 1-meter clearance around the fire water tank, with a minimum of 0.7 meters, and ensure a ceiling height of no less than 0.6 meters. The pressure gauge range shall be 2.5 times the rated pressure. 6. Fire pump adhesive composition: Install in sequence: interface, main body, connecting parts, check valve, safety valve, air vent valve, control valve. Installation height: 1.1m. 7. Pipes ≤ DN100 shall be welded. Pipes > DN100 shall use jam connections. 8. Installation distance between pipes and floor beams: Increase by 40-200mm based on pipe diameter. 9. Installation distance between pipes and supports: Increase by 3% of pipe diameter. 10. Installation distance between pipe supports/hangers and sprinkler heads: Not less than 300mm. Distance from end sprinkler head: Not less than 750mm. 11. Flexible joints and short pipes shall be used where pipes cross expansion joints. Short pipes shall not be shorter than the wall length or protrude 50mm beyond the wall. 12. Spacing between vertical pipe supports shall be 1.5–1.8m. 13. A check valve and pressure gauge shall be installed at the outlet of the fire pump. 14. Fire pressure units shall be installed at least 1.0m above the ceiling. 15. Installation sequence for fire combination units, including interfaces, main bodies, connecting pipes, check valves, safety valves, air release valves, and backflow preventers. 16. Alarm valve assemblies shall be installed 1.2m above the floor. Hydraulic alarm bells shall connect to alarm valves using newly galvanized steel pipes no longer than 6m.