Elbow Errosion

PROBLEM:

Frequent elbow erosion can be caused by particulate or two-phase flow

Unsafe elbow erosion conditions

SOLUTION:

BENEFITS:

Extended life of elbow/ less downtime, more reliability

Safer operating conditions (nuclear plants)

Elbow erosion is eliminated by preventing turbulence, internal pressure gradients, and cavitation, through the use of an internally hardened CRV®. The particles remain in the flow stream, instead of hitting the outer wall, thus cavitation induced erosion is eliminated.

Reduced pump vibration and noise.

APPLICATIONS

Coal slurry, particulate, and catalyst-blow down systems

Saturated liquid flashing

Various internal coatings for the CRV® 's are available to meet particular customer applications

RESULTS

Steam-water punch through was every two months. Three years after a CRV® was installed, x-rays show no signs of extraordinary erosion.

Catalyst blow-down pipe was penetrating the elbow wall every four months. Sixteen months after a CRV® was installed, x-rays show no signs of any preferrential wear.

Shown above is a typical cavitation induced elbow erosion, that developed in a power plant over a span of only two months.

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