Protecting power plant chimneys
Pennguard The most versatile acid resistant chimney lining for fossil fired power plants.

Unique product features

  • Chemical resistance
    For low temperature wet flue gas to high temperature untreated gas, even with a high SO content
  • Temperature resistance
    Up to 200 °C or even higher for short periods
  • Thermal Shock resistance
    Most thermal shocks have no effect on PennguardTM linings
  • Low weight
    12 – 15 kg/m², does not require anchors, earthquake resistant
  • Long service life
    virtually no maintenance


Hadek is the expert on power plant chimney and FGD ductwork protection, and the global distributor of the PennguardTM Block Lining System.

We deliver:

  • Research and feasibility studies
  • Detail engineering
  • Installation supervision
  • Lifetime Performance Monitoring System
  • 10 year limited warranty

Most recent project report

Opatovice power station

Lignite fired power station renews its flue gas desulphurization system and converts its existing chimney to a PennguardTM lined wet stack

  • Lignite fired power station, 330 MWe and 650MWt
  • Wet limestone FGD
  • 135 m high reinforced concrete chimney with sectional brick flue
  • PennguardTM lining applied directly onto internal surface of the brick flue

Our latest news

Discover the publications and study reports

WetReadyTM Guide Vane – A special guide vane for FGD Wet Stacks
CICIND Montreal 2018 – David Anderson, James Daniel, Alden Research Laboratory Inc., Albert de Kreij, Hadek Protective Systems bv