Design Buy Build Issue 22 2016 | Page 104

Eliminating Condensation F lexible elastomeric foam (FEF) insulation materials prevent condensation forming on cold, refrigeration and air-conditioning pipes Condensation on pipework should always be prevented wherever possible. Moisture formation can damage the structural fabric of a building, promote mould growth and either cause or greatly accelerate pipe corrosion. In extreme circumstances corrosion attributed to condensation can even shorten the lifespan of a mechanical system. Insulation is used to ensure that the surface temperature remains above the critical dew-point temperature so that condensation cannot form. “The properties of the insulation play an important role in preventing condensation and closed-cell materials have a clear advantage,” explains Ralf Springub from the European FEF/PEF Interest Group CEFEP (Celle, Germany). Warmer air can hold lots of moisture as water vapour but this capacity is diminished as it cools. 104