FAQs

What is a bolted tank?

A bolted tank is composed of rolled steel or alloy tank panels that are connected together via bolted connections to form a vertical cylinder used for the storage of liquid and dry bulk materials.  Today’s prominent bolted tank design is referred to as “RTP”, which designates its “rolled, tapered panel” construction.  The RTP design features panel sizes ranging from 4-5’ in width by 9-10’ in length.  RTP panel construction utilizes high tolerance manufacturing and lap joint panel connections.  When combined with the appropriate gasket and sealant a leak-free connection is maintained between panel connections.  The tapered panel construction also holds the “inside dimension” of the tank cylinder.  Each course of panels connected is called a “ring” and by connecting multiple courses of rings the cylinder is formed.  A single row of bolts, along with gasket and sealant is utilized to seal each horizontal seam.  Similarly, the vertical seams are sealed, but multiple rows of bolts may be required to resist design load requirements.  Bolted tanks are available in diameters ranging from 12’-300’ diameter for liquid storage applications and 12’-48’ diameter for dry bulk hopper storage applications.   Prominent bolted liquid applications for water and wastewater storage commonly use an aluminum geodesic dome cover which attaches to the top ring of the bolted cylinder, along with a bolted steel or concrete tank bottom.  Prominent dry bulk storage applications commonly use a bolted steel hopper, which is designed for reliable flow/discharge requirements.  

What is a shop-welded tank?

An enclosed cylindrical shape typically constructed of steel or alloy material used in the storage of dry bulk, liquid or compressed gas materials.

What is a storage tank?

A container used for the storage of dry bulk, liquid or compressed gas materials.  Common applications include vertical and horizontal cylindrical shapes with a wide variety of configurations including flat bottom, hopper (cone) bottom, dished bottom, open top, enclosed top, floating top, elevated (EST), above ground (AST) and below ground (UST).  

What is a frac sand tank?

A frac sand tank is a bolted or welded steel tank with a hopper (cone) bottom used for bulk frac sand storage.

What is a cement storage tank?

A cement storage tank is a vertical cylindrical shape that utilizes a  fluidized hopper bottom design for bulk cement storage.  Typical construction is bolted steel RTP design, welded steel and concrete construction.

What is a potable water tank?

A potable water tank is a container used for potable water storage.  Small potable water containers can be constructed of fiberglass, steel or plastic resins.  Large potable water tanks are typically constructed utilizing bolted steel RTP design, welded steel and reinforced concrete construction. 

What is a dry bulk storage tank?

A dry bulk storage tank is a vertical, cylindrical shaped storage tank used for the storage of dry bulk materials.  Common applications include hopper (cone) bottom configurations.  Other special applications include flat bottom designs with mechanical unloaders.  Typical construction types utilized include the bolted steel RTP design, welded steel and concrete construction.

What is API?

A designation used by the American Petroleum Institute.

What is ASME?

A designation used by American Society of Mechanical Engineers.

What is AST?

A designation used for “above ground storage tanks”.

What is a municipal water tank?

A municipal water tank is a vertical, cylindrical shaped storage tank used for municipal water storage.  Typical construction types include bolted steel RTP design, welded steel and concrete construction.

What is a bolted steel tank?

A bolted steel tank is composed of rolled steel tank panels that are connected together via bolted connections to form a vertical cylinder shape.  Commonly used for the storage of liquid and dry bulk materials.

What is a wastewater tank?

An elevated water tank is any water tank design that maintains a bottom water level elevated above foundation grade level.  Common applications include elevated pedestals constructed of bolted RTP design, welded or concrete/composite construction.  An elevated water tank utilizes elevation and hydrostatic pressure to provide reliable distribution of potable drinking water.