HRST Inc. provides FAC (flow accelerated corrosion) risk assessment services for gas turbine HRSG's (heat recovery steam generators). The assessment involves identifying circuits at risk, performing circulation modeling, determining risk factors for each circuit, reviewing water chemistry, and providing a prioritized list of locations most at risk to FAC wear. The benefits are that clients can plan FAC outage testing and know where else to check if wear is found, as FAC can occur in many areas. HRST helps clients develop FAC monitoring plans to avoid damage and failures.

1. HRST INC.
6557 City West Parkway
EDEN PRAIRIE, MN 55344, USA
TEL. 1 952 833 1427  FAX 1 952 833 1429
www.hrstinc.com info@hrstinc.com
FAC Risk Assessment
For Gas Turbine HRSG’s
INSPECTION
ANALYSIS
DESIGN UPGRADES
TECHNICAL ADVISORS
TRAINING
July 21, 2008
FAC Risk Assessment Steps:
• Identify quantity, size, and material of all
boiler circuits at risk to FAC
• Perform evaporator circulation modeling.
This is critical for assessment of IP and LP
Evaporators!
• Determine “Risk Factor” for each circuit
based on criteria that includes material,
velocity, temperature, shear factor and
steam quality.
• Review water chemistry targets & history.
• Provide report with a prioritized list of
boiler locations at risk to FAC wear.
Benefits:
• Client utilizes the prioritized list to plan
their FAC outage testing program.
• Client utilizes prioritized list to determine
“where else” to check if FAC wear is found.
FAC can occur in numerous areas. We can
help prioritize where to look!
Flow accelerated corrosion (FAC) has
caused pressure part damage in
hundreds of HRSGs.
Developing an FAC monitoring plan is a
prudent practice to help avoid damage
and failures.
HRST has the field experience and
design experience to help prioritize
where to check for FAC.
FAC Risk Assessment engineering
locates potential problem areas.
REPORT EXAMPLE PAGE
REPORT EXAMPLE PAGE