Why do manhole covers used in sewage need special structural designs? Clena Opening Dia 600mm SMC D400 Composite Square Manhole Cover

1. Prevent Odor Leakage and Protect Air Quality
   • Sewage contains a large amount of organic matter that decomposes to produce hydrogen sulfide (rotten egg smell), ammonia, and other unpleasant and harmful gases.
   • If these gases leak through gaps in the cover, they will seriously affect the quality of life for nearby residents and the urban air environment.
   • Special Design: Incorporates a sealed structure with rubber gaskets to effectively block gas escape routes and achieve odor-proof functionality.
2. Isolate Harmful Substances and Safeguard Public Health
   • The sewage environment is a breeding ground for pathogens such as bacteria, viruses, and parasites.
   • Improperly designed covers could allow these pathogens to escape with gases or through rainwater overflow, posing potential public health risks.
   • Special Design: Utilizes high-strength, corrosion-resistant composite materials (such as GRP/FRP) that do not harbor bacteria themselves and can resist chemical erosion. Combined with a tight seal, they form a robust health defense line.
3. Withstand Complex Environments and Ensure Long-Term Safety
   • The internal environment of sewage pipes is complex, containing not only corrosive liquids and gases but also potentially flammable substances like methane.
   • This requires manhole covers to have exceptional corrosion resistance, impact resistance, and anti-static capabilities to prevent accidents.
   • Special Design: Selects composite materials with anti-static and flame-retardant properties, and is equipped with secure locking devices to prevent unauthorized access and accidental falls, ensuring both facility and personnel safety.

Recommended Product: D400 600mm Anti-Odor Sealed Composite Manhole Cover

• Core Specifications:
  • Size: Round, clear opening ∅600mm (23.7")
  • Load Rating: D400, suitable for medium to high traffic areas including roadways
  • Material: High-strength composite material (GRP/FRP), offering excellent corrosion and static resistance
• Key Advantages:
  • Effective Odor-Proofing: A precision-engineered sealing structure effectively contains sewage odors.
  • Security & Anti-Theft: Features a dedicated locking system to prevent theft and unauthorized opening.
  • Durable & Long-Lasting: Resistant to corrosion, aging, and impact, ensuring a long service life with minimal maintenance.
  • Versatile Application: Perfect for municipal sewage, drainage, and other applications with strict sealing and odor-control requirements.