FRP composite manhole cover (SMC compression-molded manhole cover) is made of fiber-reinforced thermoset composite material. It is produced through a complete process of raw material mixing, compression molding, curing, trimming and inspection. Available in round and square types, it is suitable for municipal works, industrial parks, chemical plants, residential communities and other scenarios.
FRP composite manhole cover (SMC compression-molded manhole cover) is made of fiber-reinforced thermoset composite material. It is produced through a complete process of raw material mixing, compression molding, curing, trimming and inspection. Available in round and square types, it is suitable for municipal works, industrial parks, chemical plants, residential communities and other scenarios.
✅ Resistance to corrosion and chemicals
The material will not rust and resists acid, alkali and salt spray corrosion. It can be deployed in corrosive environments such as chemical plants, coastal areas and sewage facilities. It avoids rust-related damage common to traditional cast iron manhole covers.
✅ Lightweight for easy installation and maintenance
Lighter than cast iron covers for effortless handling and lifting, reducing on-site labor intensity. Fitted with lifting lugs for convenient access during inspection.
✅ Anti-slip surface
Raised anti-slip textures on the cover increase friction for pedestrians and lower the risk of slipping on wet surfaces.
✅ Anti-theft property
Free of recyclable metal components, it has low scrap value and is less vulnerable to theft.
✅ Weather resistance
UV-resistant and resistant to aging under high and low temperatures for stable long-term outdoor service.
✅ Multiple load classes available
Complying with EN124 load classification, it offers A15, B125, C250 and D400 grades to meet load requirements for different traffic conditions.
✅ Customization available
Standard sizes range from 300‑900 mm. OEM/ODM is supported, including custom dimensions, engraved logos and marking texts to satisfy personalized project requirements.
✅ Certifications
CE and ISO9001 certificates are available. Direct factory supply.
Round cover: 300‑900 mm clear opening
Square cover: 300‑900 mm; non-standard sizes customizable
Accessories: Matching frames available; lifting lugs fitted on selected models
Municipal water supply and drainage networks, telecommunication chambers, residential communities, parks and plazas, industrial parks, chemical plants, parking lots and road renovation projects.
Cast iron cover: Excellent load capacity, yet heavy, prone to rust and at risk of theft.
FRP composite cover: Lightweight, rust-free, anti-theft and resistant to acid and alkali. Select D400 grade for heavy-load applications.
Q1: Will FRP composite manhole covers rust?
A: Made of fiber-reinforced composite without ferrous content, it does not rust and suits humid, acidic and alkaline corrosive environments.
Q2: How to select the proper load class?
A: A15: pedestrian-only green areas; B125: pavements and car parking zones; C250: light vehicle access on community roads; D400: urban arterial roads and truck lanes. Match the load class according to actual vehicle traffic in project design.
Q3: Are non-standard sizes, engraved logos and texts available?
A: OEM/ODM customization is supported for non-standard dimensions, logos and inspection markings. Moulding is required for non-standard items, and lead time is subject to confirmation.
Q4: What is the anti-theft principle of composite manhole covers?
A: It contains no recyclable metal for resale and has low scrap value, which reduces theft risk, yet it cannot fully prevent intentional violent damage.
Q5: Will it fade or peel after long-term outdoor exposure?
A: SMC FRP features UV ageing resistance. Actual ageing performance depends on formulation, production process and local sunlight and climate conditions. High-grade SMC is recommended for outdoor arterial roads.
Q6: What are the installation notes?
A: Install the cover together with its matching frame. The frame base must be levelled and compacted; suspended installation is prohibited. Use built-in lifting lugs or special tools for inspection opening.
Q7: Can FRP manhole covers replace cast iron covers for all scenarios?
A: Full direct replacement is not applicable. Each grade corresponds to a specific load capacity. D400 grade must be adopted for heavy-duty high-frequency traffic. Selection shall be confirmed comprehensively against design drawings and service conditions.
Q8: Can test reports and certification documents be provided?
A: The factory can supply CE and ISO9001 certificates, as well as third-party test reports for corresponding batches upon request.
Q9: How to choose between square and round manhole covers?
A: Round covers bear force evenly and are widely used on municipal roads. Square covers are commonly used in parks, telecommunication chambers and green belt inspection wells, selected according to the actual shape of the opening.
Q10: What is the MOQ and lead time?
A: Standard sizes are in stock. Non-standard items depend on mould availability. MOQ and lead time shall be confirmed with our sales team.
If you want to customize fiberglass products or solve your company's storage, anti-corrosion and other industry problems, Shengte Technology is your first choice.
Tel: 86 13831860303
Email: 13831860303@126.com
Address: 598 Fuyang East Road, Jizhou District, Hengshui City, Hebei Province, China