| Type: | Refractory-Lined Expansion Joint |
| Size: | 43″ Tall x 39-1/2″ Refractory Dia. (Bellows diameter 50” Dia) |
| Material: | Carbon Steel | INCOLOY® 825 | 4.75″ Thick Refractory |
| Design | Operating Temp: 653°F at 46 PSIG | 0.25″ Axial Compression |
| Testing: | Hydro-tested | Q.C. Inspection |
U.S. Bellows engineered and manufactured this refractory-lined expansion joint for a demanding regenerator application in Uruguay, where high temperatures and abrasive process conditions required a robust and reliable expansion joint solution.
The unit measures 43 inches in height and 39-1/2 inches in Refractory diameter and was fabricated using carbon steel for the structural components not in direct contact with the temperature media, the internal components in direct contact with the high temperatures were fabricated out of Stainless steel 304H, while the bellows were manufactured from INCOLOY® 825, a nickel-iron-chromium alloy known for its excellent resistance to corrosion, oxidation, and high-temperature environments. The use of INCOLOY® 825 ensures long-term performance in harsh process conditions commonly found in regenerator systems.
To protect the expansion joint from extreme temperatures and abrasive media, the unit was lined with 4.75 inches of insulating and abrasion-resistant refractory material and 304H SS anchors. This refractory lining serves two critical purposes: it protects the bellows and metal components from excessive heat exposure and minimizes wear caused by abrasive particulate flow. This design approach significantly extends the service life of the expansion joint while maintaining reliable operation under severe process conditions.
The expansion joint bellows was designed to operate at a temperature of 653°F and a pressure of 46 PSIG, while accommodating 0.25 inches of axial compression within the piping system. These design parameters ensure that the joint can safely absorb thermal movement and mechanical stresses generated during operation, thereby protecting the surrounding piping system and connected equipment.
Quality and reliability are fundamental to all U.S. Bellows products. Prior to shipment, the expansion joint underwent hydrostatic pressure testing at 68 PSIG to verify structural integrity and pressure containment. This testing confirms that the unit meets the required performance and safety standards before installation and operation in the field.
Custom-engineered expansion joints such as this refractory-lined unit demonstrate the ability of U.S. Bellows to provide specialized solutions for high-temperature and highly demanding industrial environments. With decades of experience designing and manufacturing expansion joints for industries including refining, petrochemical, power generation, and heavy industrial processing, we continue to deliver products that combine engineering expertise, high-quality materials, and rigorous testing to ensure dependable performance.