Advanced Seismic Flexible Connectors Boost Industrial Piping Integrity

Piping systems in industrial and HVAC applications are exposed to continuous movement from temperature changes, rotating equipment and seismic events. Without appropriate compensation, that movement can increase stress at joints and supports and may lead to connection failure.

Flexible connectors and seismic compensation devices are used to manage these forces by accommodating displacement and reducing the transmission of vibration through the piping network.

The flexible connector category is used primarily to absorb sustained displacement caused by ambient temperature changes, media temperature differentials and material thermal expansion. It also helps reduce the transmission of noise and vibration from pumps, compressors and other rotating equipment.

By isolating vibration and accommodating movement, flexible connectors help prevent stress from accumulating within the piping system.

Seismic V-loops are designed to address piping displacement caused by thermal expansion and seismic activity. Compared with conventional pipe expansion loops, V-loops require less space and offer favorable thermal retention.

Their key advantage is that they do not generate pressure thrust in the piping system. This avoids the anchor loads commonly associated with metal bellows or rubber expansion joints under pressure.

For copper piping systems, industry practice commonly uses braided flexible connectors to balance flexibility with chemical resistance.

Selection of flexible connectors must account for media compatibility and the installation environment. Series 412 stainless steel braid must not come into contact with chlorinated or acid soldering flux.

Series 413 meets ASTM E 84-01 fire rating requirements and is suitable for water system equipment. Its operating pressure ratings are calculated using a 4:1 safety factor.