Manholes are safety emergency ventilation devices installed on the top of storage tanks, featuring constant pressure release and intake, flexible opening and closing, safety flame arrest, compact structure, good sealing performance, and high reliability. The functions and advantages of manholes make them standard accessories for various types of storage tanks. Typical application scenarios include:
- Petrochemical industry: crude oil storage tanks, gasoline storage tanks, diesel storage tanks, methanol/ethanol storage tanks, etc., which require pressure balance and prevention of flammable and explosive gas leakage;
- Food and grain industry: edible oil storage tanks, alcohol storage tanks, syrup storage tanks, etc., which need to prevent medium contamination and evaporation while meeting food-grade hygiene requirements;
- Chemical industry: acid and alkali solution storage tanks, solvent storage tanks (such as acetone, toluene), etc., which require corrosion resistance and pressure balance to avoid tank corrosion and leakage;
- Municipal/energy industry: LNG storage tanks (low-temperature scenarios, requiring special material breathing structures), chemical storage tanks in sewage treatment plants, etc., to ensure safe and stable storage processes.
