Firstly, two diaphragms stamped from sheet metal are welded on the inner edges in concentric circles to form a diaphragm pair. Then several diaphragm pairs are stacked together for outer edge welding to form a corrugated section. Finally, connecting fittings are welded on both ends of the bellows to create an edge welded metal bellows assembly.
Edge welded metal bellows are the same elastic sealing elements as flex bellows but are formed differently.
The ratio of the inner and outer diameters of the edge welded bellows is about 1.2~3.
For the formed bellows, the ratio of inner and outer diameters needs to be limited by the plasticity of the material so that it can be manageable, generally about 1.2~1.8.
Compared with formed bellows, the axial stroke of edge welded bellows can reach up to 90% of the effective length.
Product features
Simple moulding
Compact length
Wide selection of materials
Good linearity
Longer stroke
- Stroke up to 90% in compression
- Stroke up to 30% in extension
Longer service life
High-temperature resistance
Strong corrosion resistance
Medium pressure capacity
High manufacturing cost
How to manufacture edge welded metal bellows?
- Mould design
- Diaphragm pressing
- Cleaning
- Inner Edge Welding
- Outer edge welding
- Welding inspection
- Assembling
- Product inspection
- Cleaning
- Packaging
Welding method
Tungsten Inert Gas Shielded Welding
Microbeam plasma welding
Power Beam Welding
Laser welding
Materials of edge welded meta bellows
- Stainless Steel
- AM-350, 304, 304L, 316, 316L, 310, 316Ti
- Nickel Alloy
- Monel, Inconel 600, Inconel 625, Inconel 718, Hastelloy C-276
- Carbon Steel
- SA-387, A606, A588, SA516, SS400
- Nonferrous
- WC, Copper, Aluminum, Titanium etc.
Applications of edge welded metal bellows
- Aerospace
- Chemical processing facilities
- Oil and gas
- Semiconductors
- Medical
- Food and Beverage
- Pharmaceutical production
- Pulp and paper equipment
- Semiconductor and UHV
- Cryogenic
