Asbestos Duplex Block, Duplex Pipe Covering, Pipe Covering and Air Cell Pipe Covering

Block insulation, pipe covering and air cell pipe covering are types of insulation used around concrete blocks, pipes, and boilers. Insulation may be applied in residential homes and commercial buildings to protect the structure from extreme temperatures.

Asbestos was added to insulation materials as asbestos fibers are durable and naturally resistant to heat, chemicals and other abrasive substances.

Block Insulation

Block insulation may be applied to concrete blocks that support houses, apartments and other structures. This material may also be used in the following industries:

• Power plants
• Chemical plants
• Ship yards
• Factories
• Oil refineries

The cores of concrete blocks are filled with insulation that may be in the form of liquid foam or loose foam beads.

Asbestos-containing insulation that is whole and intact may not cause health risks. Insulation that has been cut, torn or disturbed through renovation or demolition may emit asbestos fibers into the air. Installing or removing asbestos insulation may expose homeowners, construction workers and employees to asbestos.

Approximately 1.3 million construction workers are at risk of becoming exposed to asbestos on the job, according to the Environmental Protection Agency.

Pipe Covering and Air Cell Pipe Covering

Pipe insulation may be applied to heating pipes, water pipes and drains and helps pipes maintain a consistent temperature. Air cell pipe coverings are a type of insulation used to cover pipes and may resemble corrugated paper or cardboard.

Pipe coverings are typically wrapped around pipes or ductwork and may be located in the following areas:

• Ceilings
• Garages
• Basements
• Furnace systems
• Heating and air systems

Over time, pipe coverings may become brittle and may break off from the pipe.  Once airborne, asbestos fibers may be inhaled or ingested by contractors, insulators, plumbers or anyone exposed to the fibers in their home or office.

Pipe coverings were often fitted to pipes on-site and may have been cut or sawed. Asbestos fibers enclosed in insulation material can become airborne for hours or days.

Undamaged asbestos pipe coverings may be covered with newer insulation as a preventative safety measure. Crumbling or frayed pipe coverings should be removed by professionals who are trained and certified to remove damaged asbestos.