FAQ - Turbine Parts Cleaning
How long does the process take?
Smaller turbine blasting jobs can take 3 shifts, while larger turbine outages can take up to 10 days to complete the turbine cleaning scope. Below are a few examples of some different size turbine cleaning jobs and what time frame you can expect.
- 6 FD and ID fan rotating elements – Estimated 6 shifts – Curran accomplished work in 6 shifts including setting up, tearing down and cleaning up. Also came in at estimated cost, not a penny more.
- 4 main throttle valve steam chests and 4 main intercept valve steam chest – Estimated 4 days (8 shifts) – Curran accomplished in 4 days and came in under the estimated cost, saving the client 25%.
- GE Medium Steam Turbine - Rotor (14 stage), Diaphragms (13 stages), 6 packing boxes, and misc parts- Estimated 4 days or 8 shifts- completed in 3 days and came in under the estimated cost
- 600 MX G2 Steam turbine: LP turbine blast cleaning during outage - 2 low pressure turbine rotors, 2 12th stage double flow diaphragms (upper and lower half), 4 upper and lower half dingle flow diaphragms for each LP stags (13-18, total of 24 upper and lower diaphragms) – 4 days with each shift consisting of 3 crews – completed in 4 days .
Is the process clean?
Curran internationals turbine grit blasting process is totally contained. Our techs bring in turbine tents that completely cover the component being worked on. We tie-in an electric dust collector to capture any dust, thus completely eliminating dust from escaping our tents. Our technicians will then clean up and blow down any leftover dust and dispose of the waste grit. Your area will be as clean, if not cleaner than before we showed up.
What type of abrasive (sand) is used?
Curran International has a national network of suppliers to meet OEM abrasive requirements; a common blast media is virgin Aluminum Oxide (220 or 180 sieve). When the client specifics, suppliers can offer recycled oxide media meeting OEM requirements.
Do I need to provide any equipment or support?
For a turbine blasting job we typically only ask that the client provide electrical tie in for our dust collection, waste containers, scaffolding as needed to reach equipment, forklift support, service water and air. Curran International provides the labor, all blast equipment and grit, QC gauges (Almen gauges and test strips), containment tents, dust collectors, air compressors, and diesel for the compressors.