Steel Water storage  tanks are used to provide storage of water for use in many applications, drinking water, irrigation agriculture, fire suppression, agricultural farming, both for plants and livestock, chemical manufacturing, food preparation as well as many other uses. Water tank parameters include the general design of the tank, and choice of construction materials, linings. Various materials are used for making a water tanks.

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Water Storage for Drinking Water Plants

 

Sandhya design Consultancy provide design Engineering & detail drawing services for  bolted and welded steel storage tanks for potable water applications. Water storage tanks to meet AWWA and NSF 61 Standards. Our bolted steel water storage tanks are designs to be installed in 1/3 the time as other storage tanks, are easy to maintain, service and repair.

 

Water Storage for the Wastewater Industry

 

Liquid waste discharged by domestic residences, commercial properties, industry, and/or agriculture. Sandhya designs provide  wide range of products designs  such as Open Tops, Aeration and Trickling Filter tanks. Our engineers can create a wastewater bolted or welded steel storage tank system that will best suit your needs.

 

Welded steel tanks and bolted steel tanks meet standards &Codes:

• American Water Works Association (AWWA) Standards – for potable water storage

• National Fire Protection Association (NFPA) 22 & FM Approvals certification – water storage for fire protection

• ISO 9001:2008 – for material and process quality assurance

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Ground water tank

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, made of lined carbon steel, may receive water from a water well or from surface water, allowing a large volume of water to be placed in inventory and used during peak demand cycles.

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Elevated water tank

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also known as a water tower, will create a pressure at the ground-level outlet of 1 kPa per 10.2 cm or 1 psi per 2.31 feet of elevation. Thus a tank elevated to 20 metres creates about 200 kPa and a tank elevated to 70 feet creates about 30 psi of discharge pressure, sufficient for most domestic and industrial requirements.

Vertical cylindrical dome top tanks may hold from 200 litres or fifty gallons to several million gallons. Horizontal cylindrical tanks are typically used for transport because their low-profile creates a low center of gravity helping to maintain equilibrium for the transport vehicle, trailer or truck.

A Hydro-pneumatic tank is typically a horizontal pressurized storage tank. Pressurizing this reservoir of water creates a surge free delivery of stored water into the distribution system.

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Bolted  water tanks

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Our  Professional Engineers / Structural Engineer is responsible for ensuring each bolted steel tank Design will meet or exceed relevant industry standards established by the American Water Works Association (AWWA) D103-09, National Fire Protection Association (NFPA), American Petroleum Institute (API) and FM Approvals. 

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In addition to industry standards, our tanks meet or exceed local building codes including snow and wind loads as well as seismic requirements. In fact, our designs  bolted steel storage tanks can be engineered  to withstand wind loads up to 250mph!  Using heavier gauge, high strength carbon steel and anchoring the tank directly to the concrete foundation, we significantly increase our tank’s resistance to the forces of nature.  When the proper thickness and strength steel panels are used, wind girders around the top perimeter of the tank are not even needed.  As an illustration of the strength of our tanks, several of our bolted steel tanks in Chile survived large earthquakes without damage

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Our bolted steel tanks are design  for  high quality carbon steel for higher strength. Welded tanks require thicker steel to resist the heat of welding but the steel used is a lower strength.Bolted Tanks with shell thicknesses up to 5/16” depending on the project requirements.  AWWA D103  includes 4-to-1 safety factors to ensure bolted steel tanks withstand a variety of environmental stresses.  Besides exclusively using higher strength steel

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Can bolted steel tanks be sized to the need of your projects?

Yes! We have Engineered over 200 different standard configurations of bolted tanks ranging from capacities 4,000 to 2,200,000 gallons with various heights and diameters.  Our  engineering team designs each tank to the specific requirements of the project

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 Tank Bottom

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Sandhya Tank designs are complete structures and include a roof, walls and a bottom to form one solid structure with uncompromising rigidity. Many glass-fused to steel tanks do not include tank bottoms and use site poured concrete foundations as the tank floor.  Unfortunately, this can lead to leaks as the concrete foundation and the tank shell expand and contract at different rates.  Moreover, concrete is porous and moisture can invade the foundation and corrode the steel reinforcement. Another advantage of using an integrated steel tank bottom is the tank shell is bolted to the tank bottom every 2” compared to other methods in which the tank is only attached to the bottom/foundation every 4” or more.  The design standard for the connection between the tank shell and the tank floor/bottom does not exist and the American Society of Civil Engineering (ASCE) 7-16 Standard for Minimum Design Loads and Associated Criteria for Building and Other Structures published in August 2017, includes an exception to the AWWA D103. Section 15.7.7.2 relating to bolted steel tanks, includes new requirements stating tanks with an embedded steel base setting ring not be used in areas where the tank would experience uplift forces due to seismic activity. However, when permitted by building code and specifically requested by the customer, STCI can also provide bolted steel tanks with embedded shell starter rings.

Another advantage of using a high strength carbon steel tank bottom is the elimination of issues associated with the use of dissimilar materials.  Commonly glass fused to steel tanks with an embedded started ring utilize a variety of materials and finishes; glass coated shells, aluminum domes and galvanized wind girders as well as concrete tank bottoms/floors.

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