HP Composites

What is FRP Manhole Covers?

Fiber Reinforced Polymer (FRP) manhole covers are an innovative alternative to traditional cast iron covers, offering superior strength, durability, and lightweight design. FRP manhole covers are highly resistant to corrosion, wear, and tear, making them ideal for use in harsh environmental conditions, such as coastal areas or chemical plants.

Compared to cast iron covers, FRP covers are significantly lighter in weight, making them easier to install and transport. Additionally, FRP covers offer a higher load-bearing capacity, allowing them to withstand heavier loads and traffic volumes.

FRP covers are also non-conductive, making them safer for use in areas with high voltage electrical equipment. They are also less prone to theft, as they do not have any scrap value like cast iron covers. In conclusion, FRP manhole covers offer a compelling combination of strength, durability, lightweight design, and resistance to corrosion and wear. These features make them an attractive alternative to traditional cast iron covers, particularly in harsh environmental conditions or areas with high traffic volumes.


Circular manhole covers are a type of utility access cover that is used to cover openings in the ground that provide access to underground pipes, wires, or other infrastructure. These covers are typically circular in shape and made of materials such as cast iron, steel, or composite materials.

In recent years, there has been a growing trend towards using composite materials to make circular manhole covers. Composite covers are made of a combination of materials such as fiberglass, resin, and other reinforcing agents, and are known for their durability, strength, and lightweight properties.

Our Product

At HP Group, we're committed to providing high-quality and environmentally responsible composite solutions, including circular manhole covers. Our investment in a new composite business in 2012 has allowed us to develop a full line of SMC manhole covers that meet global standards of quality and safety. Our Composite circular manhole covers are also resistant to corrosion, UV radiation, and extreme temperatures, making them ideal for use in a wide range of environments. They are also easier to install and remove than traditional metal covers, which can be heavy and difficult to maneuver.


A square manhole cover is a type of cover used to secure an entry or access point to a manhole. These covers are generally made of durable materials such as cast iron, steel, or reinforced plastic. Unlike circular manhole covers, square manhole covers have a rectangular shape, making them ideal for covering square or rectangular openings.

Square manhole covers offer several advantages over their circular counterparts. For one, they can be easily positioned and secured in a way that prevents them from moving or shifting over time. They also allow for easier access to rectangular-shaped underground utilities or structures, such as electrical or plumbing conduits.

Our Product

At HP Group, we have developed a full line of square manhole covers using the latest technology and materials. Our square manhole covers are engineered to meet international standards and are built to withstand heavy loads and extreme weather conditions. They are available in a range of sizes and materials, making them suitable for a variety of applications.


Rectangular manhole covers are typically used for larger openings and are commonly found in industrial and commercial settings such as factories, power plants, and refineries. These covers are designed to provide easy access to underground utilities and infrastructure, such as electrical and plumbing systems. Rectangular manhole covers are typically made of durable materials such as reinforced concrete, steel, or composite materials to withstand heavy loads and prevent unauthorized access.

Rectangular manhole covers also come in a variety of sizes to accommodate different openings, depths, and load requirements. They can be customized with various features such as locking mechanisms, hinges, and lifting handles for easy access and maintenance. Additionally, some covers can be fitted with non-slip surfaces or anti-vibration features to enhance safety and reduce noise levels.

Our Product

At our company, we specialize in manufacturing high-quality rectangular manhole covers that meet industry standards and customer requirements. We use advanced manufacturing techniques and materials to produce covers that are durable, reliable, and long-lasting. Our commitment to innovation and quality ensures that our products are at the cutting edge of our industry, providing our customers with the best solutions for their needs.