What type of fitting may be used when taking oil off the top of a storage tank?

The use of a slip-through compression fitting when taking oil off the top of a storage tank is advantageous due to its flexibility and ease of installation. This type of fitting allows for quick assembly and disassembly without the need for specialized tools, which is especially useful in systems that may require frequent maintenance or adjustments.

Slip-through compression fittings provide a secure seal while accommodating slight movements that can occur in piping systems, such as thermal expansion or vibration. This characteristic minimizes the risk of leaks, which is critical in oil transfer applications where maintaining the integrity of the system is essential for safety and environmental protection.

In contrast, screw fittings, flanged joints, and welded connections each have specific use cases that may not be ideal for taking oil from the top of a storage tank. Screw fittings can require more time for installation, flanged joints typically involve bolted connections that might not be as compact or straightforward as desired, and welded connections are permanent, requiring cutting and welding for alterations. Therefore, the slip-through compression fitting is often preferred for its practicality and efficiency in these situations.