Tag: faq

Not normally, it all depends on the service condition or application of the expansion joint.

No, expansion joints are good for thermal or operating movements only. They should not be used for any misalignments or to close any gap while installing.

No, intermediate anchors are typically used to divide the pipeline into sections and therefore multiple expansion joints can be used to divide up the thermal expansion.

Slip joints transfer pressure thrust & spring forces into system unlike pressure balanced units.

We do not include the vibration calculations in the normal design calculations, however, if you provide the natural frequency of the vibration, we can consider it.

There will be reduction of the pressure capacity of the bellows.

Compared to stainless steel, carbon steel has modulus of elasticity at a higher temperature

We can send technicians to the field for certain repairs, however, it depends on the extent of the repair.

Yes, the gimbal hardware of a gimbal expansion joint can be designed to support the weight of adjacent piping.

Yes we are able to perform finite element analysis for bellows design. Normal bellows design is based on EJMA equations.

We do not make bellows out of titanium but every material has their fatigue cycle. Titanium has higher stress allow-ables at temperatures but it does not mean they have infinite cycle life.

Yes there are and US Bellows, Inc. can design and manufacture these.

Some hinge types can be provided with hinge pin holes which are slotted to permit limited axial travel. These slotted hinge types will not resist pressure thrust forces, and anchoring must be provided.