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In some case, fixed roofs are weakly attached. Fixed-Roof Tank A fixed-roof tank has a steel plate that is permanently mounted to the top of the cylindrical shell. These tanks are classified by their roof construction. Non-Pressurized (Low Pressure) Non-pressurized storage tanks are normally large, upright, steel cylinders varying in diameter from 30 feet to 200 feet. Vertical Cylinder Horizontal Cylinder Pressurized Sphere Spheroid Storage tanks are designed to prevent loss of material and to protect people from hazardous materials.Ĭone Roof Fixed Roof Dome Roof Non- Pressurized

Loss occurs if the material evaporates away, leaks, deteriorates in storage, is contaminated with something that reduces its value, or is consumed by a catastrophic fire. Materials need to be stored in a way that prevents loss. Storage tanks are used to store large volumes of materials. Storage tanks are also needed to store purchased chemicals and catalysts used for processing. In the Oil & Gas industry, storage tanks are needed to store feed stocks, finished products, utilities and the reserve volumes of intermediate stocks awaiting further processing.

General Function Type Code and Standard API 650 Tankĭesign - Working Document - Main Part - Used Software - Design CalculationĬonstruction - Construction Sequence - Hydrotest g g - Painting/Coating - Boxing Up - Completely Constructed