Precision Bellows Expansion Joints
Our Bellows can be fabricated to the following parameters:

  • One to 8 layers
  • Nominal ID: Φ6 through Φ100 mm
  • Working pressure: 0.1 through 1.5Mpa
  • Wall thickness: 0.1mm to 1.5mm
Types and Technology
Type
Seamless Tube
Welded Tube
Single Layer
Multi-Layer
Single Layer
Muti-Layer
Manufacturing
Process
          Cold draw seamless
tube
         Tube trim
         Hydraulic forming
         Convolution pitch
forming
         Leakage test
         Trim to length
         De-oil cleaning
         Final inspection
         Cold draw seamless
tube
        Tubes trim
         Multi-plying tubes
         Hydraulic forming
         Convolution pitch
forming
         Leakage test
         Trim to length
         De-oil cleaning
         Final inspection
         Weld tube
         Tube trim
         Hydraulic forming
         Convolution pitch
forming
         Leakage test
         Trim to length
         De-oil cleaning
         Final inspection
         Weld tubes
         Tubes trim
        Multi-plying tubes
         Hydraulic forming
         Convolution pitch
forming
         Leakage test
         Trim to length
         De-oil cleaning
         Final inspection
Special Processing
         Soldering
        Brazing
        Expoxy coating
        Electropolishing
        Passivating,
        Electro-plating
        Heat treating
Assemblies
In order to add value to single components, we can provide ready-for-installation assemblies to our customers. The
joint can be a flange, strait tube or a variety of customized applications
Assembly with Welded Tube Ends
Dual Bellow Assembly with Custom Ends
CNBSolutions takes great pride in our quality. Starting with the meticulous control of all raw materials, our complete manufacturing process is continuously
monitored. The critical parameters of our bellows, such as hardness, tensile strength, wall thickness, grain size, micro-finish and cleanliness, are tightly
monitored throughout every stage of production.

When the manufacturing cycle is complete, we take a sample size that undergoes a complete dimensional and mechanical inspection. The bellow is inspected
for all standard criteria including dimensional, spring rate, uniformity, and a visual inspection. In addition if there are any customer specific test requirements,
they are performed and documented at this time.
Quality
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