The Silent Threat: Thermal Stress in Piping
In industries like power generation and petrochemicals, pipelines often transport media at temperatures exceeding 400°C. As temperatures rise, the metal pipes expand significantly. If the system is rigid, this expansion creates immense stress on flanges and anchors, leading to catastrophic failure. Metal Expansion Joints (Bellows) are the flexible heart of these systems, providing a controlled way to absorb this movement.
1. Multi-Ply Bellows Technology
At B-NAI, we specialize in multi-ply bellows construction. Instead of one thick layer of stainless steel, we use multiple thin layers (typically SS304, SS316L, or Inconel).
Why Multi-Ply? Thinner layers provide much higher flexibility and fatigue life. This design allows the bellows to withstand higher pressures while remaining flexible enough to absorb vibrations.
2. Types of Movement Absorption
B-NAI expansion joints are customized based on the specific movement requirements of your project:
Axial Movement: Compression or extension along the longitudinal axis.
Lateral Movement: Offset between the two ends of the joint.
Angular Movement: Bending of the joint around its center.
3. Critical Accessories: Liners and Tie Rods
To ensure long-term performance, our joints can be equipped with:
Internal Liners: Protect the bellows from high-velocity flow and prevent erosion or
Limit Rods: Prevent the bellows from over-extending beyond its design limit during pressure surges.
