To some, expansion joints are expendable components within a piping system; to others, these devices are determining factors in a failed mechanism. Without a functional pipe expansion joint, systems experiencing thermal expansion and contraction may succumb to detrimental damage, rendering them useless.
Unfortunately, some mistakes people make when installing their expansion joints can negatively impact the piping and duct system. In this article, you’ll learn about those installation mistakes and how to avoid them.
Reverse Flow Direction
Reverse flow comes from vibrations, component contamination, or damage to the overall structure. It is often a result of pressure loss within the system. When installing an expansion joint with a reverse flow direction, there’s a risk of the device accumulating debris in its convolutions, possibly damaging the material. When dealing with reverse flow direction, it helps to install a flow liner or heavy gauge sleeve to act as a protective barrier to prevent flow-induced vibration and erosion.
Incorrect Pipe Alignment
Even the most durable expansion joint can have trouble fulfilling its service life if it is misaligned during installation. An aligned pipeline is essential to avoid hazardous situations between the product and its operators.
A misaligned pipe system automatically and almost immediately puts excessive stress on the expansion joint when its purpose isn’t to correct inaccuracies. It’s best to install devices close to fixed anchors and include sufficient support to carry the pipeline’s and additional equipment’s weight.
Mechanical Damage
Mechanical damage is defined as material loss due to operation. While not always apparent, pipelines and their expansion joints may endure mechanical wear. This localized damage can lead to material failure, so placing piping insulation over metal expansion joints is necessary.
Piping insulation can maintain temperatures and prevent pipes from freezing by harboring as much heat as possible. Installation operators should also ensure that joints do not have gaps that could promote leakage during operation.
While it’s common to make mistakes when installing expansion joints, improper installation can affect the component’s service life and impede a pipe system’s functionality. Furthermore, avoiding these errors may allow expansion joints to tolerate limits without fatigue.
Expansion joint installation is a central element in a pipe and duct system, so acquiring the highest quality media is imperative. At Triad Bellows, our materials are among the finest and most durable stainless steel, enabling metal joints to withstand different pressures, loads, and temperatures.
