Applications of Recessed Covers for Drains in India

Posted on September 12, 2022 by admin

Manholes are the most frequently utilized subterranean structures for utility maintenance that allow access to installed pipelines for cleaning and inspection. It is an essential part of the sanitary system and water supply, the fundamental subsurface utilities. On the streets and paved walks, manholes are common. Manhole covers are the lids that cover open manholes to protect people from tripping over them or from illegal individuals entering. Even though we frequently pass by these manhole covers, we rarely stop to consider their significance. Indian manufacturers of manhole covers like WCS are well-known throughout the world for their high-caliber goods. A survey found that the majority of manhole covers in the US are imported from India. The government’s Make in India strategy has helped manufacturers grow to new heights in recessed drain covers in India. Our manhole coverings have provided a platform for artists to display their work in some nations, like Japan, where they are ubiquitously painted in vibrant hues.

Types of Manhole Covers

Manhole covers are detachable lids used to cover and seal manholes. Manhole covers used to be constructed out of concrete, cast iron, or even a combination of the two materials. Due to certain characteristics like durability, affordability, and weight enough to remain in place, certain materials are recommended. Technology, however, has given rise to several top substitute manhole cover materials, including composite, fiberglass, and plastic.

Ductile Iron, Recessed and Solid Top.

RECESSED

For aesthetically pleasing finishing in pedestrian paths, these kinds of manhole covers are erected in recessed regions ideal for laying block paving, cement, and a layer of screed. For interior manhole covers in hospitals, cast iron manufacturing facilities, residential areas for apartments, and household gardens, it is the ideal choice. FACTA rules apply to the loading classes for recessed drain covers in India.

Applications

Manholes will offer a secure route to the sewage conduits, which must occasionally be opened for maintenance and emergencies. By keeping water from building up, recessed chamber covers shield the roads from flooding during the rainy season. It fulfills a vital function because, during monsoons, the water that has accumulated would make the roads slick, making it difficult for people to walk or drive. Our manhole covers prevent unintentional falls into the holes by people and animals. They stop the sewage tunnels from emitting offensive odors and dangerous gases that may seriously endanger people’s lives. Our drain covers make sure their goods are sturdy, difficult to steal, and reasonably priced for customers.

Connect with us for the best manhole cover price range, availability, and more. Find all the details and models on our website and feel free to inquire.

Features and Properties of Access Covers of Ductile Iron

Posted on September 8, 2022February 8, 2024 by admin

Individual needs can be satisfied with a custom cable protection combination thanks to the wide selection of ductile iron access covers that complement our access chamber systems.

Design options for Ductile Iron coverings can be customized to meet specific client requirements. Additionally, a number of locking mechanisms can be added to covers.

How our access does cover function? To safeguard the infrastructure networks underneath, Bengal Iron Corporation access covers are utilized in conjunction with access chamber systems.

Our Ductile Covers are produced employing a locking, sequential cover opening method and are indexed to assure proper fitment.

Strong Iron Access Cover Features and Properties

Security

Our Access chamber covers have security features that can be added using a convenient feature such as a spring bar, captive hinge, factory-installed security bolts, and screws, or by providing the ability for a locking kit to be retrofitted.

Cover Access for Safety

The risk of injury from the static lifting of ironwork has been reduced by the introduction of a wide variety of hinged access covers and gully grates.

Durability

Due to their lengthy lifespans, ductile iron access covers save the end user money on replacement expenses. The sitting contact regions, frame thickness, and controlled manufacturing tolerances all work to provide optimal performance.

Design for Quality Assurance

British Standards Institute independent testing and certification of Ductile Iron Covers under the BS EN ISO 9001 Quality System

Rough Performance

With less sophisticated material, we design and produce a wide variety of novel features while still achieving considerable weight savings.

Locking Safety

Locking lids on the frame and cover assist in preventing tragedies from occurring during routine labor. For sewage pipeline inspection, the covers lock open at a 130o angle and lock at a 90o angle.

Ergonomic Flexibility

Sick of stooping to move those cumber some covers? Our top cast iron drainage covers are made to be easily opened with a light pull while fully standing, by simply inserting a crowbar or other standard waterworks instrument at a 35-degree angle.

Easy-Access Hinge

Instead of lifting cumbersome ductile iron coverings, just swing the manhole cover up and out of the way. By integrating heavy-duty hinges with the rings and covers, you can maintain the same level of pressure and cut your workers’ compensation claims in half.

Resilient Ductile Iron

Our complete cover system is made of the strongest, most resilient ductile iron, minimizing maintenance and extending lifespan at half the weight and four times the strength. This includes the traditional key opening and the sturdy, long-lasting frame.

Connect with us and get your desired ductile iron access covers delivered anywhere in India. Follow our official page for more info.

Benefits of using Ductile Iron while Covering the Manhole

Posted on September 4, 2022February 8, 2024 by admin

It is significant to mention that understanding metal strengths is necessary. Ductile iron is the only choice because it has so many benefits over other materials. If you’re interested in purchasing the best cast iron manhole cover, you should learn as much as you can about the producers of these covers so that you can choose the product that best satisfies your requirements. Here is a list of top advantages you can take note of when using the same from Bengal Iron Corporation:

Unbreakable but Flexible

This compound, which is produced from substances including carbon, phosphorus, silicon, magnesium, and sulfur, is thought to increase the tensile strength of iron covers. Consequently, it is more durable than the competition in the field. In addition to this feature, the fact that our ductile irons may be bent readily without breaking attracts consumers to the metal.

Compression Power

It is crucial to remember that when discussing metals, the metal’s compressive strength is taken into account. The best way to define the phrase is as the amount of pressure that a metal can withstand before changing shape. In comparison to other comparable metals that are also used to build manhole covers, our ductile iron has a higher compressive strength. As a result, there are no better options than iron.

Unaffected by Corrosion

Manhole covers have a significant risk of destruction since they are exposed to weather conditions like rain, hail, frost, and sunlight. The iron, however, has no other options that could help the cause if it were given a fresh coat of powder or polish with our ductile iron manhole cover.

Cost-effectiveness

Cost-effectiveness is the most crucial aspect to take into account while building a manhole cover. Iron is a well-known material among users since it is less expensive than other metals. Although price is a consideration for buyers, there is still little doubt that this metal is among the best available, that you can be assured from us.

Resistant to Corrosion

Ductile iron performed well in the 90-day spray corrosion test, but the corrosion rate was only 0.25 times higher than that of pipelines and 0.1 times higher than that of gray cast iron pipes. Compared to gray cast iron pipes and regular steel pipes, the service life is twice as long.

Ductile cast iron manhole cover has more corrosion and oxidation resistance than steel in the majority of municipal applications, including those involving water, salt water, steam, etc. Our iron cover has superior vibration absorption capabilities than steel because of its spherical graphite microstructure.

Contact with us directly for your requirement and get the best ductile iron manhole cover in India.

Recessed Covers Information for Drains with BIC

Posted on September 4, 2022February 9, 2024 by admin

In some surfaced areas, sunken drain covers or recessed tray covers are used to conceal the presence of inspection chambers, manholes, and access fittings.

As per BIC, Recessed drain covers are essential when it comes to the field of artistic, natural, or colored stone paving, especially as compared to the utilitarian covers typically used in modern construction, find out the brief from us here.

They consist of two parts: the tray that sits inside the frame that is installed above the manhole. To blend in with the surroundings, this is covered in paving.

There are different sizes available, usually on order, but 450x600x90mm is the standard size used on patios and domestic driveways. To manageable maintain the bulk of the paved tray, the larger covers typically use two or more separate trays inside one frame.

In general, the ones used in commercial projects or public spaces are made of a galvanized steel frame and a galvanized steel tray. The plastic frame can be used for those with light use, such as driveways in homes. Due to the increased usage of plastic trays for footways and driveways.

For foot traffic, only grade “A” covers are necessary. For driveways, however, an “AA” cover and a safe operating load of at least 1.5 tons are needed. When parking vans or large 4x4s in driveways, think about utilizing class B cover. In public spaces, heavier applications must have Class B, C, or D coverings.

Many of the sunken manhole covers and recessed covers for drains used in residential areas today are constructed of plastic, as has been noticed. This has various benefits, such as lighter weight and lower manufacturing costs. Additionally, there are now fewer reports of jammed trays. On the other hand, the existence of trays and frames that are prone to deformation irks certain contractors. This in turn has an impact on the installation’s final aesthetic appeal, with a Ductile Iron Manhole Cover.

The development of “Square to Round” recess tray covers has been made possible by the transition to plastic frames. These are designed to fit over a circular or round Access Chamber (AC) or Inspection Chamber and give a rectangular or square cover (IC).

Access covers and manholes are intended to blend in with the paving’s design by using recessed tray covers or recessed drain covers. They are hardly noticeable when professionally and correctly fitted. However, if they get into the wrong hands, they can be turned into harmful weapons.

After the final fastening, it is advised to generously coat the internal sides of the frame and the tray’s outer borders with a thick, non-setting lubricant, such as petroleum jelly, to prevent jamming. By doing this, the sand particles are kept out of the space between the tray and frame. Additionally, the jelly makes it simpler to remove the tray.

So, get your drain cover fitted with our best manufacturing firm and keep safe your life along with others.

Eye Screening Camp at BIC

Posted on April 6, 2022 by admin

BIC in partnership with Confederation of Indian Industries (CII) and Young Indians (Yi) Kolkata chapter conducted an eye screening camp for all staff and workers at our Howrah plant. As a manufacturer of ductile iron manhole covers and other castings, we wanted to help in little ways possible to improve the lives of our employees.

A total of 150 people were screened and tested by experienced personnel from Carenetram. After eye screening the workers were provided with subsidised glasses at Rs. 100 only. They were also given the opportunity to get a cataract removal surgery done in the near future free of cost.

In addition to this, blood sugar and blood pressure testing was also conducted. Lifestyle management solutions were provided to all workers to maintain a healthy blood sugar level.

We are thankful to Yi Kolkata Chapter for providing us with this opportunity to impact and care for the lives of our employees who work so hard to manufacture world class cast iron and ductile iron manhole covers, hubless pipes & fittings, and other industrial castings.

Manhole Cover Load Guide

Posted on September 13, 2020 by admin

This article serves as an easy guide to selecting the right manhole covers based on load class for your design requirements. We have compiled this data using the codes IS 1726 for grey cast iron and EN 124-2 for ductile iron manhole covers and grates.

Grey Cast Iron Manhole Covers and Frames Guide

In India, the Grey Cast Iron Manhole Covers and Frame have been divided into 4 categories based on their usage as per IS 1726.

LD-2.5: The Light Duty cover is capable of withstanding 2.5MT or 25kN of load. These are suitable for use within residential or institutional complexes or areas with pedestrians as well as only occasional Light Motor Vehicle Traffic. These covers also used as ‘Inspection Covers’.
MD-10: The Medium Duty cover is capable of withstanding 10MT or 100kN of load. They are suitable for use in service lanes, on pavements for use under medium-duty vehicular traffic including car parking areas.
HD-20: The Heavy Duty cover is capable of withstanding 20MT or 200kN of load. They are suitable for use in institutional and commercial areas, carriageways, city trunk roads, bus terminals, with heavy-duty vehicular traffic of wheel loads between 5 to 10 tonnes, like buses, trucks and parking areas and where the manhole chambers are located in-between the pavement and the middle of the road.
EHD-35: The Extra Heavy Duty cover is capable of withstanding 35MT or 350kN of load. They are suitable for use on carriageways in commercial, industrial and port areas, near warehouses or godowns where frequent loading and unloading of trucks are trailers are common, with slow to fast moving vehicular traffic of the types having wheel loads up to 11.5 tonnes irrespective of the location of the manhole chambers.

Ductile Iron Manhole Covers and Grates Guide

As of the date of writing this article, the Bureau of Indian Standards does not have a separate code for Ductile Iron manhole covers. As a result, the most popular code used in India is the European EN124. Manhole covers and grates up to and including a clear opening of 1000 mm are divided into 6 load classes.

A 15: Capable of withstanding 15kN or 1.5MT of load. They are suitable for areas which can only be used by pedestrians and pedal cyclists.
B 125: Capable of withstanding 125kN or 12.5MT of load. They are ideal for pedestrian areas and comparable areas, car parks or car parking decks.
C 250: Capable of withstanding 250kN or 25 MT of load. The area of kerbside channels of roads which, when measured from the kerb edge, extends a maximum of 0.5 m into the carriageway and a maximum of 0.2 m into the pedestrian area.
D 400: Capable of withstanding 400kN or 40 MT of load. The carriageways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road vehicles.
E 600: Capable of withstanding 600kN or 60 MT of load. Areas imposing high wheel loads, e.g. docks, aircraft pavements.
F 900: Capable of withstanding 900kN or 90 MT of load. Suitable for areas imposing particularly high wheel loads, e.g. aircraft pavements.

Smart Plumbing: Measurement of Noise in Cast Iron Pipes

Posted on August 8, 2020 by admin

In residential as well as commercial buildings noise is generated in piping systems. An important consideration for architects and engineers when designing these buildings is the noise levels contributed by sanitary drainage pipes. These considerations influence the materials of pipes used, their orientations, and even the type of false ceiling. As a premier supplier of cast iron pipes and fittings, we at BIC detail in this blog a concise version of the available literature.[i] It entails the process of how noise level tests were conducted and the consequent results obtained for cast iron pipes in comparison with other materials.

Methodology Used

The measurements were carried out in the acoustical laboratory of Peutz bv in Mook in the Netherlands.

The variables of interest examined in this study are as follows:

Material of drainage pipe
Construction orientation

The experiment was carried out at a flow rate of 3.0 l/s.

Materials and constructions

The following table lists the types of pipes used for the experiment.

Drainage Pipe

1. Type: Cast Iron
Mass: 8.5 kg/m
Inside Diameter: 103 mm
Outside Diameter: 110 mm

2. Type: U-PVC
Mass: 1.3 kg/m
Inside Diameter: 103 mm
Outside Diameter: 110 mm

3. Type: Polyethylene (PE)
Mass: 1.23 kg/m
Inside Diameter: 103 mm
Outside Diameter: 110 mm

Standard clamps and rubber inlays were used. The pipes were installed in three variations as shown in the diagram below:

An offset with two 45º bends.
Straight vertical
Straight horizontal

Calculations

To quantify the measured noise levels in the given room, a standard sound pressure level Ln in dB(A) is calculated as follows:

Where:

Ln = sound pressure level (dB)

L0 = measured sound pressure level caused by water flow in the pipe (dB)

A = determined absorption area (m2 area of opening)

A0 = reference absorption area (10 m2 area of opening)

The result obtained is detailed in the following table:

Table: Sound pressure level L_n in dB(A) for three variants and pipe materials, flow 3.0 l/s

Pipe material	Offset vertical (A)	Straight Vertical (B)	Horizontal pipe (C)
PE	67.5	61.0	64.5
PVC	64.5	57.5	61.0
Cast Iron	Not Measured	51.0	50.5

It can be seen that the sound pressure level for the offset vertical with two 45° bends is higher than the straight vertical and horizontal pipe. BIC cast iron pipe has the lowest noise production with similar sound pressure levels for the straight vertical pipe and the horizontal pipe.

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[i] Measurement of the noise production in drainage pipes. W.G. van der Schee. https://www.irbnet.de/daten/iconda/CIB_DC25341.pdf

4 Strengths of Ductile Iron While Casting Manhole Covers

Posted on November 29, 2019 by admin

4 Strengths of Ductile Iron While Casting Manhole Covers

Are you worried about the material used in making manhole covers? Cast iron or steel it is important to note that both has its own facilities and benefits. While talking about manhole covers one need to understand that it is one of the most important aspect that have both hygienic and aesthetic values. To gather knowledge about the metals used by manufacturers and reasons of using the same, one needs to take an insight onto the details provided below!

It is important to note that one needs to know the strengths of metals. When it comes to ductile iron there are a lot of advantages added to it that makes it the only option. While you are interested in buying the best ductile iron manhole cover, they need to gather enough knowledge about ductile iron manhole covers manufacturers and buy the best that can satisfy the demand. Here’s a list of benefits that you can note to get while you use the same:

Bendable yet unbreakable

Manufactured from materials like carbon, phosphorus, silicon, Sulphur, magnesium and more, this material are considered as the something that adds to the strength of the iron covers. Thus, making it a durable than the others in the field. Apart from this quality, one more which allures the users towards the metal is that these ductile irons are easily bendable without risk of breaking.

Compressive strength

While talking about metals it is important to note that the compressive strength of that metal is taken into consideration. The term is best explained as the – pressure which a metal can withstand in order to change its shape. The ductile iron has a greater compressive strength compared to other similar metals that are also used to make manhole covers. Therefore, there are no better alternatives compared to Iron.

Resistant to corrosion

Since manhole covers are exposed to natural elements like rain, frost, hail, sun and others it exhibits high risk of damage. But with a fresh coat of powder or polish the iron has no other alternatives that can support the cause. For example – steel when compared to corrosive effects rank higher and therefore, it is advisable to use cast iron as the most effective metal.

Cost-effectiveness

The most important factor that one needs to consider while it comes to man hole cover construction is cost effectiveness. Iron compared to other metals cost less and therefore it becomes a known material among users. While cost effectiveness is one factor that consumers look into, there remains no suspicion that this metal qualifies as the best among others.

BIC is Now ISO Certified!

Posted on July 27, 2019March 18, 2026 by admin

It is with immense pleasure and pride that we would like to announce that BIC is now ISO 9001:2015 certified in manufacturing & supplying Grey Cast Iron Castings such as Hubless Pipes & Fittings, Centrifugal Pipes & Fittings, Soil Pipes & Fittings, and Manhole Covers & Frames. We have been in the manufacturing business since 1965. Our reputation, our legacy and our very existing for all these years can be attributed to the top notch quality we maintain for all our castings. As a company we have been operational since before a time the ISO 9000 standard even existed. And today we are very proud to be associated with the British Standard Institute that has presented us with the ISO 9001:2015 Quality Management Certificate.

We have always prioritized quality for our customers. Our core value of quality consciousness exemplifies this. One of our missions this past year has been to be more process driven. The rationale behind this is to increase productivity, efficiency and use documentation to improve our traceability. The ISO 9000 quality management system provided us with just the right framework to be able to do this.

When we started working with our consultant, preparing a lot of the documentation that we usually didn’t, seemed like an uphill battle. Some of the tasks seemed excessive and sometimes unreasonable even. Initially, we were tempted to document just for the sake of the certificate. However, we felt that we are doing this to improve our internal systems and not just to tell the world that look we have a certificate. Consequently, as a team we decided going into this that we will do this properly. The entire process of getting ready for the audit and approval took about 3 months.

In these months, we realized that a lot of what we were doing presently was good, but there was room for improvement in certain processes. We identified HR & Maintenance as the ones that require the most work. As a result, we begun working on improving those systems and in these months we can see significant benefits. Employee engagement has increased considerably and machine downtime is on the downward trend. Even in other departments like purchase, production or sales, minor tweaks have made us more streamlined.

We are looking forward to continuing to adhere to our systems to stay compliant, ethical, efficient and highly productive.

Grey Cast Iron: Why it’s still important?

Posted on July 8, 2019March 18, 2026 by admin

Grey cast iron belong to the oldest and most used materials for casting production. They have good foundry qualities and with continuous improvement of production technology they have achieved also suitable utility properties which have shown with increased of technical level and working reliability of castings.

1. Fire Safety: The prospects of fire in a building with PVC pipes can not only result in pipe repair but full replacement. That is because plastic can offer little to no protection in the presence of such heat. In contrast, cast iron pipes are fire resistant and can prevent the spread of fires. Another issue when it comes to fire is that when that plastic burns, it ends up emitting fumes that can be dangerous to breathe for anyone who unfortunately happens to be in the vicinity.

2. Durability & Longevity: Compared to plastic, iron always has the upper hand when it comes to durability as well as longevity. Iron is denser and does not break or deform easily on rough handling as one sees in construction sites. Cast iron piping has been used successfully in plumbing systems for hundreds of years. In fact, in the year 1623 cast iron pipe was installed in the Fountains of Versailles in France. That same piping is still functioning today. Thousands of miles of municipal water and sewer systems use cast iron pipe. The reason is long-term durability. Cast iron simply lasts.

3. Cost: Upfront although PVC products might be cheaper, the added cost of hanger spaces and expansion joints related to the pipes, the cost can exceed that of cast iron. Additionally, repairing cast iron sewer pipe is less frequent, which means that the money that might otherwise be invested in keeping them running can be used for other things.

4. Noise Factor: One of the biggest complaints when it comes to PVC pipes is that the noise from them is much more pronounced than with cast iron models. In the latter case, the chief reason for the much quieter atmosphere is because of the thickness and density of the pipe involved, which offers a lot more serenity for a homeowner. That’s not something that will occur with PVC, where the running of a faucet, the turning on of a shower or the flushing of a toilet can be heard through the walls every time. That can quickly become an annoyance, especially for someone who plans on staying in their home for an extended period of time.

5. Environmental Concerns: In order to minimize our environmental footprint, cast iron pipes would be the choice. The reasons are because PVC pipes are made with oil-based products and any PVC pipe repair usually discards the material into the trash. Meanwhile, cast iron pipes can be recreated from scrap iron.

Excessive noise and vibration are associated with equipment used in the mining, extraction, engineering equipments and processing of mineral resources. High vibration degrades structural components, often leading to huge economic failures and loss of productivity.

Grey iron has the ability to withstand thermal cycling well. Thermal cycling is where the component goes back and forth between warmer and colder temperatures. While thermal cycling can create stress and premature failure in some types of metal castings, grey iron has proven to endure the strain of thermal cycling quite well and not stress as easily.

References:

https://www.irbnet.de/daten/iconda/CIB_DC25341.pdf — Page 247

https://valsir-uneeq.co.za/EN/index_htm_files/MT_SCARICO_L02-345-1_GB.pdf — Table 2.8