Asbestos Found in High Temperature Gaskets

Asbestos is a natural rock and carries some rock-like properties, such as heat-resistance, fire retardant, and being virtually impervious to many chemical reactions. Unlike rock, asbestos is amenable to fiber form that makes it soft and pliable to be used in everything from gaskets, roofing, tiles, paint, and caulking to protective gloves. In fact, at one point, materials used in the building industry and shipyards were full of asbestos which made them durable and cost-effective. But all that was before the Environmental Protection Agency (EPA) ban in 1980s because scientists and researchers proved beyond a doubt that asbestos exposure resulted in deadly diseases. According to one estimate, more than 10,000 Americans die each year as the result of asbestos exposure.

Asbestos Exposure from Gaskets

Gaskets were also one product made with asbestos; gaskets were used in vehicles, ships, homes, and buildings to create a tight seal at flanges and openings to prevent leakage where the pump is attached to pipes and other devices. Specifically useful when the equipment is under compression, gaskets were used in pumps for acidic or corrosive chemicals, such as ammonia, or for products requiring moderate to high-temperature, such as steam. Gaskets were also used in machinery related to the automobile industry to fill the space between two pieces of equipment, in brake linings or to seal the cylinders to prevent coolant or engine oil from leaking. In short, gaskets found many applications.

Gaskets Containing Asbestos Fibers

Even after the ban, EPA allows gaskets made of asbestos to be used in automotive applications. If the fibers are tightly bound and are not likely to become free, they are considered safe. The cars we use today contain asbestos-containing gaskets in their engines. Likewise, asbestos gaskets continue to be used in various applications.

Asbestos gasket sheet/paper

There are many types and designs of gaskets available depending on industrial usage, funds available, type of chemical contact, and physical parameters:

Of these, sheet gasket used to contain asbestos in the form of compressed asbestos, now replaced by graphite. The gasket shape used to be "punched out" of the sheet and used in many applications, other than high-pressure and high-temperature applications.

Asbestos gasket manufacturers

A representative list of asbestos gasket manufacturers:

Asbestos gasket removal

By the look of it, an asbestos-containing gasket is no different from a gasket without asbestos. As such, it is necessary to take precautions and use the correct equipment as mandated by EPA when changing gaskets. Or simply leave it to the professionals.

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Asbestos Materials