The Cone Roof Tank is a staple in the storage industry, renowned for its simplicity, durability, and functionality. Engineered to store a diverse range of liquids, from petroleum products to water and chemicals, this type of tank is a popular choice across various sectors, including oil and gas, petrochemical, and water treatment.
1. Design and Construction
1.1 Roof Design
- The most distinctive feature of the Cone Roof Tank is its conical - shaped roof. This design is sloped at an angle, typically between 6° and 15°, which serves multiple purposes. Firstly, it allows for the efficient drainage of rainwater, snow, and other debris. This prevents water from pooling on the roof, reducing the risk of corrosion and structural damage over time. Secondly, the conical shape provides excellent structural stability, distributing the load evenly across the tank's perimeter.
- The roof is usually made of steel sheets, which are either welded or bolted together. In some cases, for added protection against the elements, the roof may be coated with corrosion - resistant paints or other protective coatings.
1.2 Tank Shell
- The tank shell is constructed from high - quality steel plates. The thickness of the plates varies depending on the tank's size, the type of liquid to be stored, and the design pressure and temperature requirements. The plates are joined together using welding techniques, ensuring a seamless and leak - proof structure.
- The shell is designed to withstand the internal pressure exerted by the stored liquid, as well as external loads such as wind, seismic forces, and thermal expansion and contraction. To enhance its strength, the shell may be reinforced with rings or stiffeners at specific intervals.
1.3 Bottom Design
- The bottom of the Cone Roof Tank is flat and is usually made of a single layer of steel plate. However, for larger tanks or when storing corrosive liquids, a double - bottom design may be employed. This provides an additional layer of protection against leaks and corrosion.
- The bottom plate is welded to the shell, and to prevent corrosion from the ground, it may be placed on a layer of sand or other inert material. Additionally, cathodic protection systems can be installed to further safeguard the bottom of the tank from corrosion.
2. Fittings and Accessories
2.1 Inlet and Outlet Pipes
- The tank is equipped with inlet and outlet pipes, which are strategically located to ensure smooth filling and emptying of the liquid. These pipes are usually made of steel or other compatible materials, depending on the nature of the stored liquid. Valves are installed on the pipes to control the flow of the liquid.
- For larger tanks, multiple inlet and outlet pipes may be provided to increase the filling and emptying rates. Additionally, check valves may be installed to prevent backflow of the liquid.
2.2 Manholes
- Manholes are an essential part of the Cone Roof Tank. They provide access to the interior of the tank for inspection, maintenance, and cleaning purposes. Manholes are typically located on the side of the tank or on the roof, depending on the tank's design and accessibility requirements.
- The manholes are designed to be air - tight and watertight when closed, and they are equipped with covers that can be easily opened and closed. Safety features such as ladders and handrails are often provided around the manholes to ensure the safety of the personnel entering the tank.
2.3 Level Gauges
- Level gauges are installed on the tank to monitor the liquid level. There are several types of level gauges available, including mechanical, magnetic, and ultrasonic gauges. Mechanical level gauges use a float or a tape to indicate the liquid level, while magnetic and ultrasonic gauges use more advanced technologies for accurate measurement.
- The level gauges are connected to a control system, which can be used to trigger alarms when the liquid level reaches a certain high or low limit. This helps in preventing over - filling or running out of the stored liquid.
2.4 Ventilation Systems
- Ventilation systems are crucial for the safe operation of the Cone Roof Tank. They allow the tank to breathe, preventing the build - up of pressure inside the tank during filling and emptying processes. Ventilation systems typically consist of vents or breather valves, which are designed to open and close automatically depending on the pressure inside the tank.
- In some cases, where the stored liquid is volatile or flammable, flame arrestors may be installed in the ventilation system to prevent the ignition of vapors outside the tank.
3. Applications
3.1 Oil and Gas Industry
- In the oil and gas sector, Cone Roof Tanks are widely used for storing crude oil, gasoline, diesel, and other petroleum products. The tanks are designed to meet the strict safety and environmental regulations of the industry. They are often located in refineries, storage terminals, and oil production facilities.
- The conical roof design helps in reducing the evaporation of volatile petroleum products, minimizing losses and environmental pollution. Additionally, the robust construction of the tank ensures the safe storage of large volumes of flammable liquids.
3.2 Petrochemical Industry
- The petrochemical industry uses Cone Roof Tanks to store a variety of chemicals, such as solvents, monomers, and polymers. The tanks are constructed from materials that are resistant to the corrosive nature of these chemicals.
- The ability to install different types of fittings and accessories, such as agitators and heating/cooling systems, makes these tanks suitable for storing and processing chemicals that require specific conditions.
4.3 Water Treatment and Storage
- In water treatment plants and water storage facilities, Cone Roof Tanks are used to store raw water, treated water, and chemicals used in the water treatment process. The smooth interior surface of the tank and the conical roof's self - cleaning ability make it easy to maintain the quality of the stored water.
- These tanks can be used for both short - term and long - term water storage, providing a reliable source of water for domestic, industrial, and agricultural use.
4. Advantages
4.1 Cost - Effective
- The Cone Roof Tank is a cost - effective storage solution compared to some other types of tanks. Its relatively simple design and construction require less material and labor, resulting in lower initial investment costs.
- The long - term maintenance costs are also relatively low, as the conical roof design reduces the risk of corrosion and the need for frequent repairs.
4.2 Durability
- Built with high - quality materials and a robust construction, the Cone Roof Tank has a long service life. It can withstand harsh environmental conditions, including extreme temperatures, high winds, and seismic activity.
- The corrosion - resistant coatings and proper maintenance can further extend the tank's lifespan, making it a reliable storage option for many years.
4.3 Safety
- The design of the Cone Roof Tank incorporates several safety features. The conical roof reduces the risk of water accumulation, which can lead to structural failure. The ventilation systems prevent the build - up of pressure, and the flame arrestors (if applicable) prevent the ignition of flammable vapors.
- The presence of manholes and proper safety equipment around them ensures the safety of personnel during inspection and maintenance operations.
In conclusion, the Cone Roof Tank is a reliable, versatile, and cost - effective storage solution for a wide range of liquids. Its unique design, combined with a comprehensive range of fittings and accessories, makes it suitable for various industries and applications. Whether it's storing oil, chemicals, or water, the Cone Roof Tank provides a safe and efficient storage option.
SCOPE OF WORK
Mechanical and Fabrication guarantee
Design including strength calculation (including erection condition) stress analysis and detail design based on applicable Codes, Local Regulation, Project Specifications and Standards
Thermal Design (Thermal Rating)
All technical certifications required for design work as per local regulations
Stability check (during transport, lifting and hydrostatic test) and loading data for base design
Structural analysis for main body and its support for operation load
Material procurement
Material Test and Certificates as per applicable Code and Specifications
Manufacturing
Post weld heat treatment as per code and specification
PMI (Positive Material Identification)
All NDEs as per Project Specification
Welding procedure qualification test
WPS & PQR
Welder performance test
Hydrostatic test at BlDDER shop as per Code & Local Regulations, Specifications.
Installation work for vessel internals supplied by Bidder
External surface preparation and painting as per Specification
Packing and marking as per project specifications
Preservation during transportation and storage (Including Seaworthy packing for oversea manufacturer)
Internal protection from moisture: N2 Charge
All activities to meet requirements of Data Sheets, Specifications, Codes and Standards, Local Regulations
Certifications
1. Q:Are you a manufacturer or trading company?
A:We are a manufacturer with over thirty years of experience in China.
2.Q:Can we visit your factory before placing orders?
A: Sure, warmly welcome to our factory!
3.Q:What's the information needed if I send one inquiry ?
A : Please tell us the working conditions, mediums,temperature ,pressure, equipment ' s material,size,quantity, and other special requests.
4.Q:How does your factory do quality control?
A: Quality is priority ,we make relevant strict testing before delivery.
Our factory has already obtained ASME, GOST, ISO9001 quality and ISO 14001 Environmental management system certificate.
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