Single Metal Expansion Joint
- Simplest, most economical design
- Accepts axial, lateral, angular movements
- Versatile and common throughout all industries
- Use of tie rods contain pressure thrust. Can also include hinges or gimbals
Applications
Operating Range
- Full vacuum to 2000 psig depending on size
- Cryogenic to 1650°F+
- Sizes from 1” NPS to > 240” NPS
Materials
Bellows:
- 3XX Series Stainless Steel
- Nickel Alloys
- Carbon Steel
- Titanium
- Zirconium
Fit:
-
Bellows may be attached or linked to piping flanges, pipe, or other typical
industrial connections. -
End connections may conform to standards such as ASME B16.5, ASME B36.10, or customer designed
-
Fittings may be the same at each end or different.
Form:
-
Single circular metal bellows, or 1 or more convolutions.
-
Typical dimensions of ½” ANSI NPS to 240” ID. Overall length may vary,
typically within the range of 6” to 30”. -
Bellows may include reinforcement or controlling members
-
Convolutions may be U shaped or toroidal
-
Additional accessories may be incorporated such as load bearing
restraints, movement limiters, protection devices
Function:
-
Absorbs piping (thermal) movement, primarily axial but could include lateral
and angular movements -
Movement amplitude varies, typically within the range of 1/32” to 6”.
-
Movement frequency may be extreme low cycle (1 per year), or high cyclic
(such as vibration at 60 Hz)
