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Explosive decompression (ED) refers to a sudden marked drop in the pressure of a system that occurs in less than 0. Pressure (symbol 'p' is the force per unit Area applied to an object in a direction perpendicular to the surface 1 seconds, associated with explosive violence. An explosion is a sudden increase in Volume and release of Energy in an extreme manner usually with the generation of high Temperatures and the release Generally it results from some sort of material fatigue or engineering failure, causing a contained system to suddenly vent into the external atmosphere. Engineering is the Discipline and Profession of applying technical and scientific Knowledge and

Contents

Explanation

Seals in high pressure vessels are also susceptible to explosive decompression; the rubber gaskets used to seal pressurised pipelines tend to become saturated with high-pressure gases. A pressure vessel is a closed container designed to hold gases or liquids at a Pressure different from the ambient Pressure. A gasket is a mechanical seal that fills the space between two objects generally to prevent leakage between the two objects while under compression. This page is about the physical properties of gas as a state of matter If the pressure inside the vessel is suddenly released, then the gases within the rubber gasket may expand violently, causing blistering or explosion of the material. For this reason, it is common for military and industrial equipment to be subjected to an explosive decompression test before it is certified as safe for use.

The pressure drop in other situations often takes longer than 0. 1 second, and is then more accurately described as rapid decompression. The second ( SI symbol s) sometimes abbreviated sec, is the name of a unit of Time, and is the International System of Units An example of explosive decompression is the Byford Dolphin diving bell accident. Diving bell accident At 400 am on November 5, 1983, four divers were in a decompression chamber system attached to a Diving bell on the rig being

Fallacies

Misunderstandings of the meaning of the words are quite likely to be a fuelling factor for a persistent myth that humans would explode if exposed to the non-pressure of outer space. An urban legend or urban myth is a form of modern Folklore consisting of stories thought to be factual by those circulating them Human beings, humans or man (Origin 1590–1600 L homō man OL hemō the earthly one (see Humus Outer space, often simply called space, comprises the relatively empty regions of the Universe outside the escape velocities of Celestial bodies. Accidents in space exploration research and high-altitude aviation have shown that while vacuum exposure causes swelling, human skin is tough enough to handle a drop of one atm. History First orbital flights The first successful orbital launch was of the Soviet unmanned Sputnik Aviation refers to activities involving man-made flying devices ( Aircraft) including the people organizations and regulatory bodies involved with them Human physiological adaptation to space is a challenge faced in developing Human spaceflight. The skin is the outer covering of living tissue of an animal (or plant The Standard atmosphere is an international reference pressure defined as 101325 Pa and formerly used as unit of Pressure (symbol atm This assumes that the person doesn't attempt to hold their breath (which is likely to cause acute lung trauma), the limiting factor on consciousness then being hypoxia after a few seconds. [1][2] A sudden drop of eight atm in the Byford Dolphin accident had intensely fatal results. Diving bell accident At 400 am on November 5, 1983, four divers were in a decompression chamber system attached to a Diving bell on the rig being [3]

Explosive decompression accidents on aircraft

See also

References

National and international standards for explosive decompression testing include:

External links

  1. ^ Advisory Circular 61-107 (PDF) table 1. On 10 January 1954, BOAC Flight 781 a De Havilland Comet 1 (type DH-106 took off from Ciampino Airport in Rome Italy en route to South African Airways Flight 201, a de Havilland Comet 1, took off at 1832 GMT from Ciampino Airport in Rome Italy en route to Aloha Airlines Flight 243 was a scheduled Aloha Airlines Boeing 737-297 flight between Hilo and Honolulu in Hawaii. China Airlines Flight 611 Callsign Dynasty 611 (CAL611 CI611 was a 747 on a regularly scheduled flight from Chiang Kai Shek International Airport (now Japan Airlines Flight 123 was a Japan Airlines domestic flight from Tokyo International Airport (Haneda to Osaka International Airport (Itami Cabin pressurization is the active pumping of compressed Air into an Aircraft cabin when flying at altitude to maintain a safe and comfortable environment for crew A United States Defense Standard, often called a military standard, " MIL-STD " or " MIL-SPEC " is used to help achieve standardization The Radio Technical Commission for Aeronautics (RTCA develops standards related to the FAA. 1. FAA. The Federal Aviation Administration ( FAA) is an agency of the United States Department of Transportation with authority to regulate and oversee all aspects of
  2. ^ Flight Surgeon's Guide. USAF.
  3. ^ Giertsen, J. C. ; et al. (1988). "An Explosive Decompression Accident". The American Journal of Forensic Medicine and Pathology 9 (2): pp. 91-101.  
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