Expansion Joint Connection to storage tank

In summary, the conversation discusses the placement and design pressure of an expansion joint in a piping system connected to a crude oil tank. The process man has located the expansion joint after the valve, which must be able to withstand the high design pressure of the piping system. The question is raised whether it is practical to connect the expansion joint directly to the tank's nozzle, which would only require it to withstand the pressure due to the fluid height in the tank. More information and clarification is needed to fully understand the situation, including a sketch of the existing system and a proposed system.
  • #1
Amir Sedieqy
6
0
Hello,
In a piping system connected to the outlet of an crude oil tank, process man has located the expansion joint after the valve which is connected to tank's nozzle. Since this expansion joint is located after the valve, it must be able to withstand the design pressure of the piping system. However, if this expansion valve were located before the valve, and was connected to the tank's nozzle, it should have only withstand the pressure due to fluid height in the tank, which is one-twentieth of the piping design pressure. I was wondering whether it is practical to connect the expansion joint directly to the tank's nozzle. I appreciate it if could share your similar experience.
 
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  • #2
Your description is unclear. Why is the design pressure of the piping system 20 times higher than the static pressure in the tank when the piping is connected to the outlet of the tank? Is there a pump in there somewhere? Where are the nearest anchor points in the piping system? How is the piping supported near the expansion joint? What is the tank's nozzle, or are you referring to the tank outlet connection?

We need a sketch of the existing system, and a second sketch showing your proposed system.
 

1. What is an expansion joint connection to a storage tank?

An expansion joint connection is a flexible component that is used to connect a storage tank to a pipeline or other equipment. It allows for movement and thermal expansion of the tank without causing damage to the connected components.

2. Why is an expansion joint connection necessary for a storage tank?

Storage tanks are subject to changes in temperature and pressure, which can cause them to expand or contract. An expansion joint connection allows for this movement without putting stress on the tank or the connected equipment, preventing potential leaks or damage.

3. How does an expansion joint connection work?

An expansion joint connection typically consists of a bellows (a flexible, accordion-like component) and flanges that are bolted together. The bellows can expand and contract to accommodate movement, while the flanges provide a secure connection to the tank and other equipment.

4. What materials are used for expansion joint connections to storage tanks?

Expansion joint connections can be made from a variety of materials, including rubber, metal, and fabric. The specific material used will depend on the type of tank, the contents being stored, and the operating conditions.

5. How do I select the right expansion joint connection for my storage tank?

The selection of an expansion joint connection will depend on factors such as the size and type of tank, the operating conditions, and the materials being stored. It is important to consult with a professional engineer or manufacturer to ensure the proper selection and installation of an expansion joint connection for your specific tank and needs.

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