Metal Jacketing Corrosion: The Solution
Pipes, vessels, ducts tanks and other equipment that is subject to extreme hot or cold temperatures must be properly insulated; this helps to conserve energy, prevent condensation and improve safety. In most insulation applications, an outer protective layer known as a metal jacket is used, which helps to provide resistance to damage.
Different types of metal are used to create this jacketing. Regardless of which metal is used, the jacketing is susceptible to corrosion on its interior surface, caused by water migrating into the system. Such corrosion can be extremely damaging and even dangerous and so a moisture barrier such as DryMet is always recommended.
DryMet, created and supplied by BS Stainless, is a PSMB (PolySurlyn Moisture Barrier) and is widely recognised as the most efficient way to prevent interior surface corrosion. It has many salient qualities, including:
- A proven excellent performance
- Zero pinholes, so that water cannot ingress
- Extremely low vapour transmission rate and water absorption
- Robust, tough and durable manufacture
- Low flammability
- Excellent adherence to metal substrates
- Versatility with different metal types
Only metal jacketing with PSMB should be specified and used, regardless of the type of insulation. The easiest, most effective way to ensure that the jacketing has a PSMB is to use the new ASTM standard, which specifies that it complies with ASTM C1729, Type I, Grade 1 or 2, Class A: DryMet easily meets these standards.
DryMet can be secured with banding and wing seals also available from BS Stainless. If an acoustic barrier is required, we can also include SoundMet, which will also work as a moisture barrier. In cases where additional external protection from heat is required, we can also supply mass-loaded vinyl with CoolMet.