Project Description



Formed Metal Bellows

In this paragraph, I’m going to tell you about Formed Metal Bellows. They are reliable, and has a long life.  In addition to Formed Metal Bellows come in standard sizes ranging from 1-inch to 40-feet inside diameter. Thus gives formed metal bellows a broad spectrum of pressure, temperature, flexibility, and movement requirements while conveying both corrosive and non-corrosive fluids. Next these bellows absorb axial extension and compression, parallel offset, angulation, or combinations of motions. However, our engineering assistance is available to you for your special applications or non-standard sizes.

Vacuum Applications

Formed Metal Bellows, are used for high-vacuum applications. Therefor, requiring leakage rates less than 1 x 10-10 STD ATM CC/SEC at base pressure of 1 x 10-6 TORR. Since most of these applications require extremely flexible bellows, Dannenbaum LLC recommends materials thickness of 0.006” for inside diameters (I.D.) up to 4.5”, 0.008”for I.D. up to 8.0”, and 0.010” for I.D. up to 14.” Material Thickness can be used which has a maximum pressure (Column 7 on pages 6-17) exceeding 15 PSIG.

Beryllium Copper

The beryllium copper alloys have high thermal and electrical conductivity similar to pure copper, and can be readily joined by resistance and fusion welding, brazing and soldering. The material is nonsparking, nonmagnetic; it has high galling resistance, and maintains its strength and ductility at cryogenic temperatures. A formed metal bellow is a metal expansion joint. And a metal expansion joint is a pipe expansion joint.

Multiply or Laminated Bellows

Bellows fabricated in any standard-size with multiply construction up to four plies of equal thickness. Furthermore, the maximum pressure, spring rate, and stability pressure are increased in direct proportion to the number of plies. But with the same axial deflection as a single ply. Multiply design permits a lower spring rate and a greater cycle life than a single ply configuration for an equivalent pressure.