Power plant inspection services for thermal, grid and wind assets
Generation and grid assets are inspected around outages, insurance requirements and maintenance programs, and the right method depends on whether you need to see heat, wall loss, cracks or blade damage. Describe the asset in the method advisor, get ranked methods with their limits and a typical turnaround, and send a single request for quote to providers who cover your state and asset type.
Inspection methods across a power plant and a wind farm
| Asset | Methods that fit | What they reveal |
|---|---|---|
| Switchgear, MCCs, panels, transformers | infrared inspection under load | Loose or corroded connections, overloaded circuits, phase imbalance |
| Boiler tubes and waterwalls | UT thickness, EMAT, visual and drone inside the furnace | Wall thinning, erosion, fireside corrosion, hydrogen damage indications |
| Steam piping and headers | UT and PAUT, MT, replication | Weld cracking, creep damage indications |
| Gas and steam turbines | borescope inspection, eddy current, PT | Blade damage, coating loss, cracks, foreign object damage |
| Generators | Visual, eddy current, UT on retaining rings | Wedge looseness, cracking, insulation issues |
| Wind turbine blades | wind turbine drone inspection, rope access, UT and thermography for internal checks | Leading edge erosion, cracks, lightning damage, delamination |
| Wind tower welds and bolts | UT, MT, bolt tension checks | Fatigue cracks at welds, loose or failed bolts |
| Overhead lines and substations | Drone visual and infrared, corona cameras | Damaged insulators, hot clamps, conductor wear |
| Solar farms | Aerial thermography | Hot cells, bypass diode failures, string outages |
NFPA 70B, wind blade inspection and other references
- NFPA 70B, the standard for electrical equipment maintenance, which includes periodic infrared thermography as part of an electrical maintenance program. Ask the provider how their survey and report support your program interval.
- NFPA 70E for electrical safety when panels are opened energized; infrared work under load needs a qualified person and the right PPE.
- ASTM E1934 for infrared examination of electrical and mechanical equipment.
- ASME Section I and the National Board Inspection Code for boilers, and ASME Section XI for in service inspection at nuclear units.
- Wind blade inspection usually follows the turbine OEM or owner damage classification, with categories from cosmetic to severe; ask providers which scale their reports use.
- Thermographer certification (Level I, II or III) and ASNT qualifications for UT, MT and PT technicians, plus Part 107 remote pilot certification for drone crews.
Each provider states its own certifications on its profile. Request copies before work starts.
What power plant and wind inspection catches
- Electrical hot spots before they turn into an arc flash or an unplanned outage.
- Boiler tube thinning mapped tube by tube so you can plan replacements for the next outage.
- Turbine blade and vane damage seen through a borescope without opening the casing.
- Blade erosion and cracks photographed at high resolution from a drone, often 3 to 8 turbines per day per crew depending on wind and site.
- Cracks at tower flange welds and bolted joints that develop from cyclic loading.
Limits to plan around
- Infrared needs real load; a lightly loaded circuit can look healthy and still be loose.
- Drone imagery shows the blade surface only, so suspected internal damage still needs UT, thermography or an internal crawler.
- Borescope coverage depends on access ports, and some stages can only be seen partially.
- UT thickness readings on boiler tubes require clean surfaces, so scale removal is part of the scope.
- Weather sets the pace on wind farms; wind speed limits for flying and climbing add days to any schedule.
Typical cost of power plant inspection services
These figures are typical estimates for US jobs, not a quote. Travel, outage access, crew size and reporting depth decide the final price.
| Job | Typical range, not a quote |
|---|---|
| Infrared electrical survey | $800 to $2,000 per day |
| Boiler tube UT thickness mapping | $1,000 to $2,000 per technician day |
| Gas turbine borescope inspection | $1,500 to $4,000 per inspection |
| Wind blade drone inspection | $150 to $400 per turbine |
| Wind blade rope access inspection | $1,500 to $3,500 per turbine |
| Overhead line drone survey | $150 to $500 per mile |
| Solar farm aerial thermography | $1,000 to $4,000 per site |
Volume matters: a 40 turbine wind farm or a full plant electrical survey prices very differently per unit from a single asset.
Details that make a power or wind RFQ quotable
- 01Asset count and type: number of panels or MCC sections, boiler tube rows, turbine model, blade length, line miles.
- 02Access and timing: outage dates, energized work rules, site safety training, wind farm access roads.
- 03Method expectations or the result you need (thermal report per NFPA 70B program, blade damage categories, thickness grid).
- 04Deliverables: annotated images, damage classification per blade, thickness maps, data in a format your CMMS or asset system accepts.
- 05Location and state, since crews price travel and mobilization.
Read how to get NDT quotes to see what happens after you send.
FAQ
How often should switchgear get an infrared inspection?
NFPA 70B sets intervals based on equipment condition and criticality, and many sites survey at least once a year; your insurer may set its own requirement.
Do drones replace rope access for wind blades?
For surface damage screening, usually yes, and drones are faster per turbine; rope access is still used for repairs, close up checks and some internal inspections.
Can a borescope inspection happen without an outage?
No, a gas or steam turbine borescope needs the unit shut down and cooled, so it is scheduled into a maintenance window.
What should a wind blade inspection report include?
Images of every blade side, damage located by radius and side, a severity category for each finding and recommended action and timing.
Get matched with power and wind inspection providers
The method advisor ranks the options for your asset, notes what each one does not see and gives a typical price band labeled as an estimate. Your RFQ goes to matched providers after you create your account and confirm your email. You compare replies and sign directly with the provider. Buyers do not pay anything.
- 01What needs inspecting
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- 02Material
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- 04Concern
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Provide thermography, UT or drone services to utilities? List your company
Show your methods, certifications and the states you cover to buyers planning outages and wind campaigns. See pricing for plans.