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Top 4 Piping Flange Issues That May Cause Leakages

Flanges are used to connect piping systems and maintain an efficient flow of gas and liquid. However, like most components, they can break down and cause system failures. From ill-fitting gaskets to corrosion on weld necks, the following are some of the common issues you may encounter.

1. Excessive Load and Stress Shocks

Depending on the nature of the installation, piping systems can experience excessive forces that weaken the flanges. It is usually a result of loose-fitting connections and poor flexibility within the system. The bending shocks can change the alignment of the piping flanges.

Poor configuration of supports and restrains can distort the components of the pipe fittings. Misalignments of these components may also be as a result of inconsistencies within the system. Dirt, scratches, protrusions, and the warping of the gasket can clear a path for the fluid to leak out.

It is also important to pay attention to the long weld neck nozzle dimensions. That is because a poorly fitted long weld neck will cause the flanges to misalign. If the alignment is not at the center, the gasket will compress unevenly. In turn, the fluid will leak.

2. Thermal Shocks

Piping parts for high-temperature applications should be chosen carefully. Frequent fluctuations of temperatures can cause thermal shocks that warp the shape of the flanges temporarily. It could turn out to be hotter on one side and cool on the other.

One common cause of temperature shocks may be that one side is exposed to gas or liquid flow. It is possible to install sheets of metal on one side of the flange circumference, to keep temperature distribution even.

Additionally, the long weld neck nozzle dimensions should be designed to provide a smooth gradient across the pipe flange. The long weld neck allows the heat to dissipate from the base through to the narrow of its hub.

3. Durability and Fatigue

It is not easy to determine exactly when the flange will succumb to fatigue. Often, the load will be directly proportional to how fast the machine deteriorates. Vibrations through the piping system can inhibit the functionality of the assembly, which can accelerate fatigue.

The right long weld neck nozzle dimensions can prevent vibrations by reducing restrictions within the piping. The length of the nozzle can slide into the mating component to ensure smooth gas and liquid flow.

Flanges and their assembly ought to be tested periodically. It is crucial to establish the correct preload rating for the fastener. In high-pressure applications, it is advisable to change the flange frequently to ensure optimal performance.

4. Stress Crackling Corrosion

In the industrial environment, metallic fittings can be depleted by corrosive chemicals. Stress corrosion cracking is particularly destructive, as it can force the material to break under tension. Appropriate coatings such as aluminum or a zinc alloy can be applied to keep the weld fittings at their optimum conditions.

Several issues can compromise the performance of the flange and the piping system. Using the correct handling recommendations and adhering to the maintenance routine can minimize the risk of failure. However, these are just a few of the most common issues. In order to get the full picture it is important to consult an expert. For more information, reach out to us today.

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