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An Overview of Ductile Iron Manhole Covers

ductile manhole covers in India - Govind Steel

Depending on the application and requirements of an area, the accessibility and precision of ductile iron manhole covers are defined. However, one crosses by and witness a manhole cover everyday, no one pays attention to the details. The details as to how sturdy, long-lasting, and efficient they are for the required area of application. For the ones who know little about it, let us take a quick look at it.

What are Manhole Covers & why are they important?

Pretty much what the name suggests, Manhole Covers are removable iron, cast iron or ductile iron plates that essentially cover the opening of a manhole to prevent objects and people from falling into it. If you’re installing a new manhole cover or you’re replacing an existing one, measuring the space is key. Finding out the basics of a manhole cover is important to assure a perfect fit and zero-compromise with structural integrity.

What are the different types of Manhole Covers?

Ductile Iron Manhole Cover  

Strong, sturdy, resilient and heavy-duty, ductile iron manhole covers are used over a D400 class. The main purpose of using Ductile iron, also known as cast iron, is because of its strength. This type of manhole cover is used to add a long life span to any application. This kind is particularly used for installation in airports, docks, and other heavy-duty industrial areas.

Recessed Manhole Cover 

More like a holder or an outline structure, Recessed manhole covers essentially have a cut out in the tray so that bricks, paving bricks, cement, and other pavements can be installed. Since the cover is hardly visible, this allows the recessed manhole cover to blend in with the surroundings. It is useful for pedestrian walkways, side footpaths, etc. It’s also an excellent solution for internalized manhole covers. For example, hospitals, workshops, organisations, and societies.

Solid top Manhole Covers 

Places where safety and maintenance need to highlighted, Solid top manhole covers are used for those areas. The idea behind designing these covers is to highlight prominence on a specific floor or a certain area to keep people away from it. These are installed in the areas where one needs to highlight a certain architecture as opposed to hiding it. It is an anti-slip surface where the top is visible or even raised too. The starking contrast between the solid floors and the solid top manhole covers makes them easy to identify.

Where to find the best Ductile Iron Manhole Covers in Kolkata?

Govind Steel Company Limited is a 55-year-old Brand, making it one of the best foundries in India. We have a varied range of products like Ductile Iron Manhole Frames, Covers and Grates, Surface Boxes, Valve Boxes, Counter Weight, Industrial Castings, Manhole Frames and Recessed Covers, etc. For more information about foundries and to view our varied range of products, call us on +91 33 25309445, or leave us a mail on info@govindsteel.com and be rest assured to get a reply within 24 hours. You can even visit us at 219, Chittranjan Avenue, Kolkata – 700 006.

by webmanager webmanager

Manhole Covers: History, Characteristics & More

There are many everyday objects that we come across and never wonder about. From something as simple as a comb while grooming ourselves in the morning to the manholes we cross over as we walk down the roads. Have you ever wondered what goes behind making the cover of a manhole? Manhole covers date back to the era of ancient Rome when they were made of stone.

Manhole covers, as we all know are the removable lids atop a manhole, usually big enough for a person to pass through. They are used to access underground pipelines and vaults. They started off as slabs of stones and sometimes, pieces of wood and this continued till the 18th Century. In the 19th Century, modern ductile manhole covers were developed. For the last 200 years, manhole covers are made of cast iron in varied designs.

While circular manhole covers are what we frequently come across, manhole covers are also available in different shapes like rectangle and square and varied sizes. There are also triangular manhole covers in some parts of the world. Here are some interesting characteristics of different types of manhole covers:

  • Choosing the right cover: When searching for the right manhole cover, many factors have to be considered. Construction, dimension specification, as well as the positioning of the manhole, have to be kept in mind while purchasing the manhole cover.
  • Division as per weight: Different manhole covers weigh differently, depending on the load they have to deal with. A manhole cover on an airport runway will have to be much heavier than a cover on the road, whereas one on a pavement which has only pedestrians and cyclists is lighter.
  • Locking of manhole covers: As an extra measure of security, manhole covers have the option of being locked up or welded, especially in case of manholes on roads where racing occurs. It may sound bizarre, but often manhole covers are stolen to be sold as metal scrap.
  • Difference between shapes: A round manhole cover is often chosen because the chances of it falling through its circular opening are very low whereas it is possible with square covers. They are much smoother, have smaller surface area, are easily movable as well as easy to lock in place.

Ductile manhole covers and manhole frames are invisible products that make our life smoother. Made of cast iron, they are sturdy and essential for the running of any city. Govind Steel, a leading foundry in India constructs varied types of manhole covers and frames as well as manhole grates. They have different shapes, sizes and designs along with other cast iron and steel products. To check out their vast range of products, visit http://www.govindsteel.com.