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HVAC stands for Heating, Ventilation, and Air-Conditioning three closely related fundamental functions with both commercial and residential applications. The concept was coined by Volkart Brothers, being the pioneers in this segment, and was introduced way back in 1950. The steady growth of the real estate market in India has created opportunities for major developers to promote large format office spaces and associated structures like malls, resorts, hi-tech hospitals, etc. This growth has necessitated in realising the importance of the HVAC and Fire-fighting systems in both residential and commercial structures as a prime essential for safety and health. | |
HVAC can further be distinguished as two separate segments
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| The primary use of HVAC is to regulate room temperature, humidity, and air flow, ensuring that such elements remain within their acceptable ranges. Effective control of such factors minimizes health related risks. | |
For application of MS Pipes in this segment, details regarding the common practices followed, sizes of steel pipes used, and specifications required are as given blow.
Class of MS Pipes to be used in Air Conditioning and Chiller Systems depends on environmental conditions like proximity to sea, corrosiveness, cooling flow, cooling zone and operating pressure.
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It has evolved as a prime safety parameter for any real estate development. For any construction above 3 floors. irrespectie of being residential or commercial and manufacturing units, fire-fighting is now a mandatory requirement.
Tata Pipes have forged market leadership in the Fire-fighting segments by providing a clearly superior performance over competition. Usage in projects throughout India is testimony to Tata Pipes' attention to quality and safely.
Sizes normally used range from 25mm to 300mm NB "C" Class MS Pipes with plain end or socketed confirming to IS: 1239 & IS: 3589 specifications.
In an internal hydrant, the installation comprises of the following elements:
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Basic requirements as per standard norms of Fire-Fighting (IS 3844 & IS 9668) in high-rise buildings are as given below.
- For buildings of height of 18 mtrs to 30 mtrs, the risers should not be less than 100mm internal diameter.
- For buildings exceeding height of 30 mtrs, the risers should not be less than 150mm diameter.
- The hydrant coupling valve in each floor should be of minimum 65mm MS Pipe
- Hose reel bore of 25mm diameter with 8mm hose should be used
- For effective water jet force, a 12.5mm bore nozzle should be used
- Overhead tank should not be of capacity less than 20,000 litres
- The underground tank should not be of capacity less than, 100,000 liters
- Depending on the height of the building , 80mm to 100mm pipes should be used for line from pump to main hydrant
- For individual floor lines, pipes of diameter 25mm to 32mm should be used
- For sprinkler system, 25mm pipes should be used
The suction and delivery pipes should be of adequate size to meet the functional requirements of the pump, and should not be less than following:
| Suction | Delivery | |
| 450 I/min terrace pump | 50 mm | 50 mm |
| 900 I/min terrace pump | 75 mm | 50 mm |
| 1400 I/min terrace pump | 100 mm | 100 mm |
| 2280 I/min fire pump | 150 mm | 150 mm |
| 2850 I/min fire pump | 200 mm | 150 mm |
| 4540 I/min fire pump | 250 mm | 200 mm |
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