Rubber expansion joints are made of an elastomeric tube reinforced with multiple plies of fabric. This fabric reinforcement may be in the form of solid metal rings or wire embedded in the rubber. Several rubber layers and reinforcements are then molded together to form the bellow. After molding, the rubber bellow is vulcanized.
Mechanical properties
A rubber expansion joint is a mechanically flexible joint between two parts. It is composed of a carcass made of a material such as natural or synthetic rubber and an interior metal reinforcement. The latter supports the joint during pressure and movement. In addition, solid rings or wire embedded in the carcass strengthen the joint to withstand high pressure. Lastly, a leak-proof lining tube is installed through the bore to the outside edge of the flanges.
The mechanical properties of expansion joints can be evaluated by measuring their properties under load. To test a rubber expansion joint, a test stand must be prepared. This test stand should include a reference specimen.
Applications
Rubber expansion joints are used in a variety of industries. For example, they are a common part of power generation. They are used in coal burning, hydroelectric, and nuclear heated facilities. They also help to prevent leaks and provide a high level of flexibility. Many different types of fluid pipe systems are utilized in power plants.
To make rubber expansion joints, engineers must first understand the material’s intrinsic properties. This includes how it can resist fuels and oils. They also need to balance low temperature flexibility with high oil resistance.
Dimensions
Rubber expansion joints are engineered rubber products that are inserted into a rigid piping system. Their role is to absorb movements and improve thermal stability while compensating for misalignment. TANIQ has developed an optimized process for designing and manufacturing rubber expansion joints. This process follows lightweight engineering principles and incorporates numerical and finite element models to produce an optimal design. The company’s automated manufacturing process also introduces significant cost savings while improving quality.
Rubber expansion joints are manufactured in a variety of styles and dimensions. Standard sizes feature an engineered sphere design, which is stronger than hand fabricated cylindrical shapes. The rubber expansion joints sphere shape allows for uniform distribution of force over a large area. Other features of the standard models include wire-reinforced flanged collars and embedded nylon cord reinforcement. Some sizes feature floating flanges to make installation easier. Custom sizes and materials are also available.
Cost
Rubber expansion joints are a popular choice for construction companies. They can improve the fit of pipes and are easy to maintain. In addition, they are easy to adapt to a wide variety of situations. These joints are offered by companies like Dannenbaum LLC, which offer high-quality construction parts at affordable prices.
Both rubber and metal expansion joints can withstand movement in the axial plane. However, metal expansion joints can withstand greater lateral movements. Both types are available in universal or dual construction. Special polymers are sometimes used to increase their strength and resistance to abrasion.
Installation
When installing rubber expansion joints, there are a few things that need to be considered. One important factor is the pressure and temperature rating of the joint. If the pressure is higher than what it can handle, the joint may fail. Other factors include plasticization or hardening of the material. For these reasons, it is crucial to properly anchor the joint.
Another important factor to consider is how the expansion joint will be used. In many instances, the joints will be installed on equipment and pipelines that carry fluids and gases. These liquids and gases can be dangerous, so special precautions need to be taken to protect the people working near them. To prevent leakage and other damage, it is best to install rubber expansion joints where they can be inspected easily. The joints should also be installed over areas that have proper drainage. It is also best to hire qualified pipe fitters to install the rubber expansion joints.
