D400 Composite Screw-Fix Manhole Cover for Driveways

The BAOGAI Edge: Unmatched Trust & Engineering Depth

For D400 highway-grade projects, the reliability of the manufacturer is your primary safety insurance.

• China’s Only Listed Manufacturer: BAOGAI stands alone as the only listed company in the composite manhole cover sector. This status ensures complete financial transparency, rigorous third-party audits, and a commitment to quality that protects your reputation. When safety is non-negotiable, choose a partner with the highest level of corporate accountability.
• Elite In-House Mold & Tooling Center:We don’t rely on third-party mold shops. Our in-house facility utilizes advanced CNC machining to create high-precision SMC molds. For D400 covers, this means a perfectly engineered fit that eliminates rattling and uneven stress distribution—factors that are critical for long-term road safety under heavy traffic.

Product Overview

The BAOGAI Φ700mm D400 Composite Screwfix Manhole Cover is specifically designed for main carriageways and high-traffic arterial roads. Built with premium Sheet Molding Compound (SMC), this cover features a 70mm deep-profile frame for maximum stability. Rated to withstand 400kN (40 Tons), it provides a high-strength, anti-theft, and maintenance-free alternative to ductile iron for the most demanding urban environments.

Technical Specifications

MAIN PARAMETER

Why Choose SMC D400 Over Cast Iron?

• Ultimate Road Safety (Anti-Theft): Manhole cover theft on highways is a major safety hazard. Because SMC has zero scrap value, BAOGAI covers stay where they are installed, protecting drivers and reducing municipal liability.
• Fatigue & Impact Excellence: Our SMC material uses long-fiber reinforcements that offer superior impact absorption compared to BMC or cast iron. It can withstand millions of axle-load cycles without structural fatigue or “brittle cracking.”
• Corrosion & Chemical Immunity: Unlike metal, SMC is unaffected by road salts, automotive fluids, and corrosive gases from sewer systems. It will never rust or seize, ensuring easy access for maintenance even after decades.
• Noisy-Free Traffic: Precision-molded in our in-house factory, the cover and frame fit together seamlessly. This dampens vibrations and eliminates the loud “metal clanging” typical of iron covers, improving the quality of life in urban areas.

Target Applications

• Main Roads & Highways: High-speed vehicular traffic.
• Gas Stations & Fuel Depots: Spark-proof and heavy-load capable.
• Logistics Hubs: Frequent heavy-truck and forklift movement.
• Industrial Estates: Areas requiring chemical-resistant drainage access.

FAQ

Q1: Can your SMC D400 truly replace Ductile Iron on main roads?

A: Absolutely. Our D400 series is tested rigorously to EN124 standards. Many municipal projects globally have switched to BAOGAI SMC to solve the dual problems of theft and corrosion while maintaining 40-ton load security.

Q2: How does the “Listed Company” status benefit my procurement?

A: It guarantees that we use 100% virgin high-grade resins and fibers. We are audited for compliance and quality—unlike smaller, private workshops, we cannot afford to compromise on raw materials. You receive exactly what is promised on the technical sheet.

Q3: Is the Φ700 specification the clear opening or the frame size?

A: Φ700mm refers to the external frame diameter. The clear opening is 647mm, which is the standard size for personnel access to most underground utility chambers.

Call to Action

Secure Your Heavy-Duty Projects with a Global Leader.

Partner with BAOGAI for D400 solutions that combine the strength of SMC with the trust of a listed manufacturer.

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