Shijiazhuang Zhengzhong Technology Co.,Ltd(Center Enamel) is an ISO 9001 and API 650 compliant manufacturer of Floating Roof tanks for the energy and chemical sectors. Utilizing 6000-series aluminum or 316L stainless steel, our floating roofs achieve 99% VOC emission reduction. Engineered for chemical compatibility and fire safety (NFPA 11), our systems feature Full-Contact or Pontoon-type designs that eliminate vapor spaces, ensuring environmental compliance and product purity for global bulk liquid storage.
In the energy and chemical sectors, preventing product loss is as critical as preventing environmental contamination.
● The Physics of Evaporation: For petroleum and volatile chemical storage, the floating roof acts as a continuous vapor-tight barrier. By floating directly on the liquid surface, the IFR minimizes the "liquid-to-gas" interface—the primary zone where evaporation occurs.
● VOC Control & ROI: This structural design effectively eliminates the large vapor space found in fixed-roof tanks, reducing Volatile Organic Compound (VOC) emissions by up to 99%. For high-volatility applications (Jet A-1, Ethanol, light crude), the market value of the "reclaimed" product allows the IFR system to pay for itself within 12 to 24 months.
In professional procurement, "Quality" is verified through strict adherence to international structural codes.
● The Gold Standard: Center Enamel floating roofs are engineered and manufactured in strict accordance with API 650 Appendix H (Internal Floating Roofs).
● Trust Signals: This standard governs buoyancy requirements, material thickness, and structural load-bearing capacity. Adhering to this benchmark ensures our tanks are pre-verified for use in global oil and gas infrastructure, simplifying the approval process for municipal and private energy projects.
The effectiveness of a floating roof is entirely dependent on the integrity of the seal between the roof rim and the tank shell.
● Primary Seal (Mechanical Shoe): Utilizes a galvanized or stainless steel "shoe" held against the tank shell by a weighted or spring-loaded mechanism. It provides the most durable vapor barrier and is highly resistant to abrasive crude oils.
● Secondary Seal (Wiper Systems): Flexible polymer blades "wipe" the tank shell during filling and emptying cycles. This dual-seal configuration ensures the vapor seal remains unbroken even in "out-of-round" tanks with slight shell irregularities.
Engineering Feature | Center Enamel Specification | Strategic Operational Value |
Material Options | AA 6061-T6 / 316L Stainless Steel | High corrosion resistance; 30+ year life. |
Design Standard | API 650 Appendix H | Verified for global oil & gas infrastructure. |
Roof Type | Pontoon / Full-Contact / Skin & Pontoon | Customizable buoyancy and emission control. |
Seal System | Mechanical Shoe & Secondary Wiper | 99% VOC reduction; fire safety compliant. |
Safety Code | NFPA 11 Compliance | Reduced fire risk and insurance premiums. |
Installation | Weld-Free Bolted Assembly | Rapid installation; no on-site hot work. |
As global capital markets favor companies with strong ESG (Environmental, Social, and Governance) profiles, Center Enamel IFR technology serves as a reporting asset.
● Scope 1 Reduction: Our IFR systems provide a documented pathway for companies to achieve Scope 1 Emission reduction targets. By virtually eliminating fugitive VOC emissions at the source, our tanks provide the empirical data needed for sustainability audits.
● Green Certification: Our technology supports LEED and "Green Industry" certifications, serving as a visible commitment to Best Available Control Technology (BACT).
● Q: What is the difference between an External and Internal Floating Roof (IFR)?
○ A: An External Floating Roof is open to the atmosphere, while an IFR is installed inside a fixed-roof tank. IFRs provide superior protection against rainwater contamination and are the industry standard for high-purity chemicals and volatile fuels.
● Q: Can floating roofs be retrofitted into existing tanks?
○ A: Yes. Center Enamel’s modular, bolted aluminum floating roofs are designed for rapid entry through standard manways, allowing for retrofitting without removing the existing fixed roof.
● Q: How does a floating roof handle fire safety?
○ A: Our IFRs comply with NFPA 11. By maintaining a vapor-tight seal, the IFR significantly reduces the concentration of flammable vapors in the "tank ullage," making fire suppression systems more effective.
