News Updates

Hennigan Engineering brings 650 Megawatt Unit back to full power by removing 46,000 lbs of scale

Hennigan Engineering successfully removes 46,000 lbs of scale using High Pressure Water Jetting Services, bringing a 650 megawatt unit back to full power.

After several unsuccessful attempts by other companies, using high pressure water jetting and chemical cleaning, Hennigan Engineering was contacted to try to resolve the issue of removing hard calcium scale from a 34,000 tube unit.


  • The Unit was derated by 300 megawatts due to biological and calcium scale which was a result of a fouling event that was introduced via a re-circulation cooling lake.
  • Tube Flow was decreased to where 50-55% of the tubes had no flow at all.
  • Urgency was required as Unit downtime was a considerable factor in mid-summer months.

Success Story

  • Hennigan Engineering Removed an estimated 46,000 lbs of Calcium Scale.
  • The Plant was able to return to 650 megawatts of full power upon re-powering.

For more information on this project and the cleaning program designed by Hennigan Engineering, please contact us!

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Helium Leak Testing Used To Pinpoint Leaks!

Our Helium Leak Detection Team can pinpoint the smallest of leaks!!

Mass spectrometer leak testing techniques allow leak detection capabilities to a level of 1 X 10-11  with graphic recording for historical data retrieval.


  • Machine Parts & Fittings
  • Pharmaceutical [ovens, chambers, freezers & incubators]
  • Packaging
  • Heat Exchangers
  • Condensers—Main Steam
  • Tubing [Hydraulic—Water—Gas]
  • Boilers / Tanks / Vessels
  • Pipe [Fittings-Valves-Below Grade-NonMetallic-Metallic]
  • E-Beam Welded Parts and Fittings
  • Solar Panel Process Chamber

Testing can be performed at our facility or yours.  Our testing equipment is portable and can be shipped anywhere in the world.  With our Field Engineers and Support Technicians we can support your needs in a prompt and professional manner to meet the most aggressive schedules.


Helium Leak Testing of Refrigeration System
Helium Leak Testing of Refrigeration System
Helium Leak Detection
Sample of Helium Leak Test Graph
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Upcoming Trade Shows 2018

2018 Duke Energy Fossil/Hydro Tech X Conference

  • Embassy Suites by Hilton Charlotte Concord Golf Resort & Spa
  • Concord, NC
  • USA
  • August 27 – 29, 2018

2018 Condenser Life Cycle Seminar

  • Royal Sonesta New Orleans
  • New Orleans, LA
  • USA
  • September 10-12, 2018


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Complex Video Inspection – New York Aqueduct System

In the spring of 2018 Hennigan Engineering was sought out by an ENR top 50 engineering firm to become part of a specialized and uniquely qualified team of professionals to perform complex video inspection services and customized high pressure biomass/scale removal services in a large scale and multi-phased project for the New York Department of Environmental Protection’s 70 mile Aqueduct system.

This water supply system is one of the most extensive public water supply systems in the world that moves more than one billion gallons of clean water per day into the city and surrounding boroughs.  It is comprised of aqueducts, tunnels, reservoirs and pumps.  It provides water for the city’s more than eight million residents and its many visitors.  95% of the total water supply is supplied by gravity.

The other 5 % needs to be pumped to maintain pressure.  The original system was completed in 1928. The system’s Operation & Maintenance is the responsibility of the New York City Department of Environmental Protection.

We recently designed and deployed specialized pipeline video inspection equipment capable of recording pan/zoom/tilt data in color; from large diameter pipes with over 700-ft vertical sections that reach hundreds of feet below the elevation of the bottom of the Hudson River from Roosevelt Island.

In addition, we designed and successfully demonstrated a that fully cleaned the cementitious sidewalls of the aqueduct from difficult biomass and scale.  This involved custom-designed pressure cleaning heads that balanced pressure, approach angle, speed and volume to maximize cleaning production without causing damage to the aqueduct walls.  We will continue to support this project over the next several years.

High Pressure Cleaning of Aqueduct

Working on the aqueduct system in this capacity requires specialized equipment and personnel with specific expertise and experience that only Hennigan Engineering provides.

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Upcoming Shows 2018

Hennigan Engineering is pleased to announce we will be exhibiting at the following upcoming shows:


24th Annual Nuclear Generator & Supplier Executive Summit – Seattle, WA                       July 18 – 20, 2018   hosted by Utilities Service Alliance


24th annual Nuclear Generator and Supplier Executive Summit â?? Seattle, WA. â?? July 18-20, 2018and 

The 2018 Condenser Life Cycle Seminar  – September 10-12, 2018 – at the Royal Sonesta, New Orleans, LA

2018 Condenser Life Cycle Seminar



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