Frequently Asked Questions

What Are Your Hours

Conco can be reached 24/7.  Our offices operate on a typical 8am to 5pm business schedule; however, our answering service is on duty around the clock and is ready to relay emergency situations to Conco personnel.  Help is available day or night…

Why Should I Choose Conco TruFit™ Mechanical Tube Cleaners Over a Competitor’s?

A Conco tube cleaner with TruFit™ technology is our promise that the tube cleaner you buy is the perfect match for your tube dimensions. Exact cleaner sizing means precise blade radius for maximum cleaning action.

Conco TruFit™ tube cleaner blades do not have sharp corners or edges as some in the industry do. The Conco design prevents gouging and removal of base tube material.

Conco carbon steel cleaner blades are heat treated for strength, then tempered to create the spring action that ensures deposit removal and tube protection.

There is a TruFit™ cleaner for every type of fouling deposit, including mud, slime, algae, mussels, manganese, iron, crystalline and calcium carbonate.

How Quickly Can You Respond?

In most instances we can have a crew onsite with 24 hours. Conco arranges for crews to begin the coordination and assembly of the equipment and cleaners almost immediately.

The limiting factors are travel time and location. Air travel is based upon the airlines schedules and is limited as we try to maintain costs for our customers. In emergencies, we can take the flights that get us to the location the quickest. Driving allows us more flexibility but then our response time is affected by distance.

Do Metal Cleaners Damage Tubes

Conco’s high-quality, properly constructed metal cleaners do NOT damage tubes. The cleaner blades are tempered, and travel down the tubes without causing consequential tube wall loss.

The excerpt below is from a technical paper titled “The Practical Application & Innovation of Cleaning Technology for Condensers.”

“It was found that after 100 passes of (Conco) cleaners, wall thickness reduction was only between 0.0005" and 0.0009" (12.5and 23 μm). At this rate, extrapolating the worst-case removal from this series of tests for a 0.049" wall thickness, it would take about 2,700 passes of a cleaner per tube, or roughly

1,000 years of annual condenser cleanings to result in a critical reduction in tube wall loss.”

For access to the full paper click HERE

What is the Typical Size of your Crews?

This greatly depends upon the size of­­­­­­ the unit and the timeframe the plant has for the outage. The most common crew size is 4 men per shift. This takes into account the need for the hole watch. However, smaller condenser may only require 3 man crews. We can also shoot around the clock and provide 3-4 man crews per shift for 24 hour coverage.

What is your standard shift?

We typically shoot in 12-hour shifts; however, we do have plants that require 8 or 10-hour shifts based upon plant personnel availability.

Are your crews made up of Conco employed technicians or do you use day laborers?

All Conco crews are trained and employed by Conco. This allows us to make sure the technicians sent to the customer’s site are trained in how to perform the work correctly, efficiently and safely.

New Service Technician Training Includes:

  •    OSHA-10 Certification
  •    Safety Procedural Training
  •    Respiratory Fit Training & Testing
  •    Basic Plus
  •    Hands-on Shooting Training
  •    Confined Space
  •    First Aid / CPR / AED / BBP
  •    DOT/Defensive Driver Training 

What propels the cleaner down the tubes?

We use 100% water for our propulsion source. This provides a consistent force that drives the cleaners through the most difficult fouling and also removes the loose debris in front of the cleaner preventing build up and stuck cleaners.

It is also the safest method. As a cleaner exits the tube, it is moving at a relatively slow speed. This allows gravity to take effect quickly and the cleaner begins falling to the floor of the condenser within a few feet after exiting the tube.

How long does it take to conduct an air in leakage test?

It depends on the size of the unit (Megawatts)

100 MW or smaller = One 8-hour shift
100 MW to 400 MW = One 10-hour shift
400 MW to 700 MW = One 12-hour shift
700 MW & larger = Two 10-hour shifts

When doing SF6 online injections to determine which waterbox has a tube leak, how small of a leak can you detect?

We have seen indications of less than a gallon per day.

What is the definition of the term Fill Factor (FF) in relation to Eddy Current Testing (ECT) and Remote Field Testing (RFT)?

Fill Factor is the ratio of the probe diameter to the Inner Diameter (ID) of the test specimen. Typically the FF for ECT is 85% and 75% for RFT.

Can I find a leak using Eddy Current testing?

Yes, it is possible, but Eddy Current testing is not a method of leak detection. Eddy Current testing should be used to assess the condition of a component and help plan for preventive maintenance.