Hanson Water Storage Tanks
BLADDER – BLOWDOWN – BUFFER – EXPANSION TANK SPECS PRICES
FILTER – HOT WATER GENERATORS / SOLAR / STORAGE TANKS – HYDROPNEUMATIC NON-BLADDER TANKS
CUSTOM HORIZONTAL – VERTICAL WATER STORAGE TANK DESIGNS
Hanson Tank manufactures a full range of ASME water tanks for all industrial and residential applications. Here are some of the most common types, which can be built for either horizontal or vertical installations. Types of supports available include saddles, legs, ring bases or as required. If you have a specific requirement not mentioned, please inquire. SEE WATER TANK PRICE LIST
HOT WATER STORAGE TANKS:
Large hydropneumatic tanks are usually horizontal and 2000 gallons or more. Hanson Tank has manufactured hydropneumatic tanks up to 30,000 gallon capacity. The size is determined by the needs of the system, and is approximately the drawdown gallons times four. A small air compressor can be included to replenish the air volume periodically as it is absorbed into the water. Sensors monitor the water level and pressure and automatically control compressor operation as required. These vessels are usually lined to prevent corrosion and have a design working pressure of 125# ASME. Hanson Tank can manufacture the basic tank or supply all the components for a complete system ready to install.
Tanks that include an internal bladder are usually smaller, and sometimes called captive air or bag tanks. There are styles that are designed to replace the expansion tank in a domestic hot water system. All bladder tanks are usually a standard vertical design. On larger versions, the bladder is often replaceable through a flange, which can be either on the top or bottom of the tank depending on the application.
Vertical hydropneumatic tanks can also have a diaphragm which can be fixed or floating. This virtually eliminates the absorption of the air into the water over time and makes the compressor unnecessary. These are built to order only.
SIZES: Hanson Tank manufactures water tanks from 12″ to 12′ in diameter up to 70 feet long. Although standard tank heads (end caps) are manufactured in 6″ increments, any diameter or length of vessel is available. Here are some typical sizes. Please note that all our tanks are cylindrical. Rectangular or square pressure vessels are very unusual and not part of our product line.
|12″ x 34″||15||0.46|
|18″ x 49″||50||1.06|
|24″ x 65″||120||1.9|
|30″ x 70″||200||3.0|
|36″ x 88″||360||4.3|
|42″ x 96″||520||5.8|
|48″ x 104″||735||7.7|
|54″ x 115″||1040||9.7|
|60″ x 160″||1820||12.2|
|66″ x 182″||2500||14.6|
|72″ x 231″||3800||17.6|
|78″ x 236″||4550||20.7|
|84″ x 229″||5000||23.0|
|96″ x 275″||8000||31.3|
|120″ x 360″||16400||48.5|
|144″ x 576″||37700||70.5|
LININGS: Here is a list of the most popular tank linings, with their characteristics. Service life is impossible to predict, as there are dozens of factors involved, especially the temperature and Ph level of the water. However, as all Hanson lined water tanks are equipped with an access opening, regular inspection of the lining is easy.
Epoxy: Sprayed on to a sand blasted surface, epoxy linings have a durable, glossy surface. Typically lower in cost than other linings, they offer excellent durability during shipping and handling but can deteriorate if water temperatures of 180ºF.
Glass: More correctly called “porcelain enamel”, glass lining is sprayed onto a sand blasted surface, and then fired at 1500ºF to fuse it to the tank interior. Although the surface is smooth and continuous, minor imperfections are normal, and protected by the installation of anodes. These deteriorate first, and must be checked periodically and replaced when necessary. The glass lining can be damaged during shipment, and the tank must be skidded for shipment.
Cement: The tank interior is coated with a special blend of Portland cement to a thickness of .75″, over a welded wire mesh. The lining must be kept moist up to the time the vessel is put into service to prevent cracking. Careful handling of the tank is also necessary to avoid damage . If periodic inspections reveal damage or erosion of the lining during service, field repairs can be carried out.
Galvanizing: After preparation, the tank is submerged in molten zinc, which coats both the inside and outside with a thin layer. Due to the size limits of the vats available, galvanizing is more common on smaller tanks, and although an option, is rarely used on large hot water storage tanks. However, it is frequently specified on smaller vessels such as expansion tanks.
INSULATION: The majority of hot water storage tanks are insulated to save energy. This can be done very cost effectively at the factory. These are the most popular systems:
Polyurethane Foam: The standard system is a two component sprayed coating that expands and hardens to about two inches thick, for about an R16 insulation value. When cured, it is coated with 25 mils of semi- rigid white acrylic weatherproof coating. Any minor damage during shipment can easily be repaired in the field.
Aluminum Jacket Insulation: Semi-rigid Fiberglass with Aluminum Jacket insulation medium is purpose-manufactured semi-rigid premium quality fiberglass wrap with Kraft paper lining and flexible foil vapor barrier. The fiberglass filaments are laminated parallel to the facings for enhanced flexibility and maximum coverage.