Construction & Reinforcement Types
High-Pressure Bellows (Thick-Wall)
A high-pressure bellows is built with thicker-wall material, additional plies, or reinforcing rings — often some combination of all three — specifically to hold a higher pressure rating than a standard-duty bellows of the same diameter.
Representative example — real Uma Bellows expansion joint:
How it works
Thicker walls resist pressure better but flex less easily, so high-pressure designs are a deliberate trade-off, engineered and tested (including squirm and rupture testing) to confirm the joint holds its rated pressure without losing the flexibility the application actually needs.
- Thicker-wall or multi-ply construction for elevated pressure ratings
- Often paired with reinforcing rings at the convolution root
- Verified with destructive rupture and squirm testing before shipment
- Real Uma Bellows units on file rated at 24, 120, and 160 kg/cm²
Related: Externally Pressurized Bellows · Reinforced Bellows · Case Studies
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