Pneumatic bladder
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A pneumatic bladder is an
inflatable An inflatable is an object that can be inflated with a gas, usually with air, but hydrogen, helium and nitrogen are also used. One of several advantages of an inflatable is that it can be stored in a small space when not inflated, since inflata ...
(
pneumatic Pneumatics (from Greek ‘wind, breath’) is a branch of engineering that makes use of gas or pressurized air. Pneumatic systems used in Industrial sector, industry are commonly powered by compressed air or compressed inert gases. A central ...
) bag technology with many applications.


Emergency management applications

Pneumatic bladders are used to seal drains and ducts to contain
chemical spills A chemical accident is the unintentional release of one or more chemical hazard substances which could harm human health and the environment. Such events include fires, explosions, leakages or release of toxic or hazardous materials that can cause ...
or gases. Pneumatic bladders are often used for the containment of chemical spills,
oil spills An oil spill is the release of a liquid petroleum hydrocarbon into the environment, especially the marine ecosystem, due to human activity, and is a form of pollution. The term is usually given to marine oil spills, where oil is released into th ...
or fire water on water to prevent them from entering the environment, usually in the form of
boom Boom may refer to: Objects * Boom (containment), a temporary floating barrier used to contain an oil spill * Boom (navigational barrier), an obstacle used to control or block marine navigation * Boom (sailing), a sailboat part * Boom (windsurfi ...
s.


Marine applications

The Reef Ball Foundation uses a pneumatic bladder technology to float an artificial coral reef ("reef ball") into location, then deflate the bladder to sink the reef to the bottom.


Other applications

Pneumatic bladders, known as
dunnage bag Dunnage bags, also known as airbags, and inflatable bags, are used to secure and stabilize cargo. Introduced around 1970, dunnage bags provide convenient and cost-effective cargo stabilization in ISO sea containers, closed railcars, trucks, and ...
s, are used to stabilize cargo within a container. Pneumatic bladders are used in medical research.
Leading edge inflatable kite A leading edge inflatable kite (LEI) is a single skin kite with inflatable bladders providing structure. It is useful as a power or traction kite. These kites are flown using 2, 4 or 5 control lines and a bar. (See also: kite control systems) ...
s use pneumatic bladders restrained by a fabric case; the bladder is selected slightly larger than the case, so that at operational inflation the bladder is not stressed while the case defines the final shape of the leading edge. Many of the wing's airfoil ribs are similarly bladdered.


See also

*
Balloon A balloon is a flexible bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, and air. For special tasks, balloons can be filled with smoke, liquid water, granular media (e.g. sand, flour or rice), or light so ...
*
Bladder The urinary bladder, or simply bladder, is a hollow organ in humans and other vertebrates that stores urine from the kidneys before disposal by urination. In humans the bladder is a distensible organ that sits on the pelvic floor. Urine enters ...
*
Bladder (disambiguation) The bladder, or urinary bladder, is an organ that collects urine for excretion in animals. Bladder may also refer to: Biology * Artificial urinary bladder, in humans * Gallbladder, which stores bile for digestion * Pig bladder, urinary bladder o ...
*
Fuel bladder Fuel bladders, fuel storage bladders are a type of Flexi-bag used as a fuel container. They are collapsible, flexible storage bladders (also known as tanks) that provide transport and storage (temporary or long term) for bulk industrial liquids ...
*
Swim bladder The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled Organ (anatomy), organ that contributes to the ability of many bony fish (but not cartilaginous fish) to control their buoyancy, and thus to stay at their curren ...
*
List of inflatable manufactured goods This is a non-comprehensive list of inflatable manufactured goods, as no such list could ever completely contain all items that regularly change. An inflatable is an object that can typically be inflated with a gas, including air, hydrogen, heliu ...


References

Marine salvage operations Environmental engineering {{industry-stub