Structural Steel Tubes in PEB

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Structural Steel Tubes

Structural Steel Tubes in PEB

Structural steel tube is amongst the most preferred construction material for engineers, architects, contractors and fabricators since it is highly durable, tensile and corrosion resistant. Around the world, there is a shift toward high-performance materials in structural engineering. In the steel construction sector, this has been more evident with built-up sections, but hollow sections are now in the process of raising the strength levels of their products.

The use of steel tube has the potential to reduce material costs and project cost. The popularity of steel tube in construction has increased dramatically over the years as engineers have become aware of the advantages of steel tubes. The incorporation of steel tube connections in the construction standard have simplified connection design and contributed to the rise in use of hollow structural steel.

Steel tubes are very efficient sections and their major benefits are inherent in their shape and engineering properties. The closed shape and relatively large moment of inertia about the weak axis make them highly resistant against the torsional effects. PEB has seen tremendous growth in the last decade over the conventional steel building. Currently PEB manufacturers are using built-up sections manufactured by welded plates. Use of structural steel sections in PEB reduces the steel consumption & overall project cost by 10-15%. This also saves the transportation & erection cost as compared to built-up sections.  

How to make an efficient PEB using Structural Steel Tube

Use of High Diameter High Thickness Tubes in primary members

High diameter high thickness tubes are used as primary member for Pre-Engineered Building. Apollo Column offers India’s largest hollow steel sections up to 300x300mm in size with 12 mm thickness

Bringing New Tube Making Technology

Earlier there was constraint on using steel tubes in PEB due to availability of standard sizes only. But now this constraints totally eliminated by Direct Forming Technology, an Italian invention. APL Apollo is the first company to introduce this technology in India.

Factory Controlled Fabrication

Fabrication work using structural steel tube can be carried out in small factory set-up. Prefabrication is the singled out approach to build steel buildings using steel tube. This allows the considerable part of the process to happen on the workshop floor

Erection using Bolted Connection

Steel tube sections are fabricated at the factory to the exact size, transported to site and assembled at site using bolted connections

Different Types of Steel Pipes & Tubes

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Steel Pipes and Tubes

What are different Types of Steel Pipes & Tubes

Steel pipes and tubes industry is one of the important segments of the Indian steel sector. It contributes around 12 % of the India’s steel consumption. Steel pipes & tubes are long hollow sections that are used for a variety of purposes. They are produced by two methods which result in either a welded or seamless pipe. In the both processes, raw steel is first cast into a more workable starting form. It is then made into a pipe by drawing the steel out into a seamless tube or forcing the edges to join together by welding. These are used mainly to convey fluids, and pneumatic conveying of solids. It can also be used as building material for structural applications. They are employed to protect electrical wires. They also find utility in automobiles, heating and plumbing systems, flagpoles and street lamps to name a few.

Now let us see the different types of steel pipes & tubes:

1. Structural Steel Tube:  The tubes employed in constructions are known as structural tubes. They encompass strength, tolerance, and other beneficial properties that make them the right choice for building purposes. They find their usage in a myriad of constructional purposes like building towers, bridges, cranes, highway guardrails, and sign supports, etc. They are also referred to as high-strength welded steel tubes or HSS. The structural tubes are of three types – Rectangular Hollow Sections, Square Hollow Sections, and Round Hollow Sections. Structural steel tubes are used in construction of urban infrastructure, warehousing and affordable housing

2. API Pipe: The American Petroleum Institute specification (API) covers seamless and welded steel line pipe. This is steel pipe for pipeline transportation systems in the petroleum and natural gas industries.  API 5L is suitable for conveying gas, water, and oil.  

3. Ductile Iron Pipe: Ductile iron pipe is made of ductile cast iron commonly used for potable water transmission. These pipes are manufactured by centrifugal casting.

4. Precision Tube: Precision Tubes are widely used in making shock absorber, gas spring applications, tie rods, propeller shafts etc. These tubes are manufactured from high grade steel and are tested on various International as well as Indian standards. They are also used for manufacturing white goods.

5. Water Line Pipe: Steel pipes are comparatively expensive, but they are the strongest and most durable of all water supply pipes. They find their usage in water transportation for irrigation, industrial water lines and many more.  

Use of Colour Coated Pipes

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Use of Colour Coated Pipes

Colour Coated Pipes

Steel pipes are generally available in bare state. These are then coated at site for aesthetics and rust prevention. This creates land and air pollution apart from being expensive. This problem can be solved by use of factory controlled colour coated pipe. This is not only economical but also minimizes the impact on the environment. Painting in automatic lines ensures better quality and longer life. Pipes after manufacturing take time during transit and are exposed to varying environmental conditions. They can get superficial rust during transit particularly in humid weather. The colour coating of pipes before dispatch will tackle this problem of rusting of pipes in transit and also when the pipes are lying at the sites for weeks or months before being utilized.

Moreover painting such rusted pipes not only involves greater effort to remove the rusting, but it also impacts the cost upwardly. The colour coated pipes will help maintain the sanctity of the specifications of the pipes at usage. The result is better finish as well as aesthetic appeal. What’s more, the pre painting process is environment friendly.

Colour coated tubes have variety of household structural applications. These tubes are preferably used in Handrails, Gates, Home Decorations, Furniture, and Door Frame. It provides appealing aesthetic to interiors and exteriors. Furniture made from colour coated tube is the best way to improvise the interior of house. They will last for years in the same owing to their longevity. Colour coated tubes are crucial for the construction of balconies and roofs of every house. Door frame made up of colour coated tubes lend a classy facade to the house.

Let’s see the benefits of colour coated tube:

Appealing aesthetic: Use of colour coated tube imparts brilliant aesthetics to a house without compromising on the quality

Prevention of Rusting: Colour coating ensures prevention of rust formation over bare tube during transit to site of installation

Cost Effective: Colour coated tubes are economical. Painting at site requires various other processes such as blasting/pickling which subsequently increase the cost.

Better Quality: Factory controlled painting ensure better quality & superior finish

Environmental Friendly: Use of paint at site creates land & air pollution

Apollo Color brings colour coated tube for the first time in India for household structural applications.

Modular Buildings and Use of Steel

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Modular Buildings

Modular Buildings

Modular structures are constructed in-house with final assembly occurring on-site, where the modules are stacked and connected together. Modular construction is a process in which a building is constructed off-site, under controlled factory conditions, using the same codes and standards as conventionally built facilities – but in lesser time. Buildings are produced in “modules” that when put together on site, reflect the identical design specifications and intent of the most sophisticated site- built facility – without compromise.

Let’s have a look at the advantages of Modular buildings:

Greener: The factory-controlled process generates lesser wastage, eradicates site disturbances and allows for tighter tolerances.

Faster: Construction of modular buildings in factory occurs simultaneously with assembling at site, allowing projects to be completed in half the time of traditional construction.

Smarter: Modular buildings are built with the same materials and to the same standards as conventional construction methodology.

Modular Buildings are built with hollow steel sections and cast steel connectors, then joined with bolts to create complete buildings. Trends for affordable housing with low construction cost & faster completion is picking in India. Many cities are facing underground water shortage due to concrete based construction. So, steel based construction should be promoted. Modular Building using structural steel will be the future construction methodology.

Benefits of using steel in Modular Building:

Fast Project Completion: Project duration significantly reduces when structural steel is used in construction of Modular building.

Lower Project Cost: Structural steel reduces the project cost and generates faster revenue.

Minimal Wastage: Use of structural steel reduces wastage while construction. The off-site fabrication process results in less material waste than conventional site-built construction.

Environmental Friendly: Conventional construction methodology causes severe pollution & loss of ground water.

Flexibility in Design: Use of structural steel in Modular Building gives flexibility to create unique structures.

Longer Span: Structural steel allows increased spacing between structural members and greater spans can be achieved.

Recyclable: Structural steel can be recycled indefinitely.

APL Apollo launched Apollo Column for Modular Building Construction using hollow steel section. Use of Apollo Column reduces the overall project cost as compared to traditional construction methodology.