Yaran Foundry Polymer Manhole Covers – Buying Guide & Product Overview

Selecting the right manhole cover is one of the most important steps in urban infrastructure, civil engineering, and utility projects. This guide provides comprehensive information about manhole cover load classes, installation procedures, key purchasing considerations, and the advantages and disadvantages of polymer manhole covers to help you choose the most suitable product for your application.

Manhole Cover Classification According to Standard 14148

According to National Standard 14148, manhole covers are manufactured in different load classes. Each class is designed for a specific application, and the technical experts at Yaran Foundry can help you select the most appropriate class for your project.

Available Load Classes

• Class A – Non-Traffic | Load Capacity: 1.5 Tons | Suitable for sidewalks and pedestrian areas
• Class B – Non-Traffic | Load Capacity: 12.5 Tons | Suitable for parking areas and sidewalks with light vehicle traffic
• Class C – Semi-Traffic | Load Capacity: 25 Tons | Suitable for areas adjacent to roads
• Class D – Traffic-Rated | Load Capacity: 40 Tons | Suitable for roads and vehicle traffic lanes
• Class E – Traffic-Rated | Load Capacity: 60 Tons | Suitable for ports and dockyards
• Class F – Traffic-Rated | Load Capacity: 90 Tons | Suitable for airports and other heavy-duty applications

Note: Polymer manhole covers are manufactured up to Class D (40 Tons).

Polymer Manhole Cover Installation

• Site Preparation: Ensure the installation surface is level, clean, and free from debris or obstructions.
• Frame Installation: Position the frame securely and ensure it is perfectly level.
• Cover Placement: Place the cover on the frame, ensuring a tight fit without any movement or play.
• Final Inspection: Check the alignment, verify there are no leaks, and ensure the cover operates correctly.

Key Considerations Before Purchasing a Polymer Manhole Cover

• Select the appropriate load class based on the intended application.
• Purchase from a reputable, standards-compliant manufacturer such as Yaran Foundry.
• Avoid products manufactured from recycled raw materials.
• Seek technical consultation to ensure the correct product selection.

Advantages of Yaran Foundry Polymer Manhole Covers

• Lightweight compared to cast iron and concrete covers
• Cost-effective
• Excellent chemical resistance
• Corrosion-resistant and ideal for humid environments
• Electrically insulating and non-conductive
• High resistance to UV exposure and sunlight
• Withstands temperatures from -56°C to +220°C
• Clean and aesthetically pleasing appearance
• Noise-free under vehicle traffic
• Custom logo branding available
• Manufactured in a wide range of sizes
• Compatible with various manhole systems
• Theft-resistant

Disadvantages of Polymer Manhole Covers

• Cannot be detected by metal detectors if buried
• Maximum load capacity is limited to 40 Tons (Class D)
• Non-recyclable