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

Five ideas to make Power Station Chimneys more economical and more environmentally efficient
CICIND Virtual Conference 2020 – Albert de Kreij, Sales Director, Hadek Protective Systems bv