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Posted By EE
Help, would anyone know how much pressure (in psi) it would take for a narrow (1mm diameter) jet of hydraulic oil to penetrate skin / eyes?
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Posted By Descarte I would suggest it would take a lot less pressure to penetrate the eyes than the skin, and it would also be determined on the diameter of the jet. I have not been able to find a definitive answer to this question but have sourced the following information, which unfortunately ranges in psi from quite low to quite high. The pressure required to penetrate the surface of the skin is in the order of 7x105 N/m2 or 100 psi from: http://www.waterjetting.org.uk/health_safety.htmlHigh pressure injection injuries are caused by liquids or gasses entering the body from a source, such as a hydraulic hose, exhibiting pressures of 600-12,000 psi. From: http://www.everything2.c...ure%20Injection%20Injuryat pressures ranging from 600-12,000 psi. From: http://www.ncbi.nlm.nih....ds=3669115&dopt=AbstractThe nozzles of paint and grease guns emit a fine stream of liquid at pressures of 600 to 1,200 pounds per squareinch (psi). The power from hydraulic lines circulates at between 1,800 and 2,200 psi. Fine jets of fluid aredriven at such terrific velocity as to equal the pressure of a bullet driven from the muzzle of a rifle!If a pressure gun is discharged into your skin even from 10 centimeters away, small particles of oil, paint, dirtand rust may get injected into the tissues. Damage seems small and the bit of broken skin seems trivial. Don’tbe fooled, you may have a very serious injury. In time the affected area may become severely swollen andpainful. Time lapse between the injection and painful swelling depends on the material injected From: http://66.249.93.104/sea...hl=en&gl=uk&ct=clnk&cd=7
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Posted By Paul Adams
Can't help with the pressures, but when injected as described in the previous post, hydraulic oil attacks the tissue and affected tissue requires surgical removal urgently - the longer it is left, the more it migrates through the tissue and the more damage is done. That is my understanding.
I have a powerpoint presentation from a major organisation detailing the effects which was provided in the spirit of sharing. It has some particularly unpleasant photographs of the results of the surgery and I would pick your audience carefully. E - mail if you want a copy.
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Posted By allan wood
as far as i know the pressure required to penetrate the skin is 100 p.s.i.
several years ago i was involved in an accident whilst undertaking some hydro demolition works, i recieved a high pressure injection myself, the lance i was using failed due to metal fatique, and the water was injected into my wrist at an angle and became lodged in the muscles in my forearm.
this resulted in 8 days in hospital, 3 operations, 4 days on an intravienous drip with my right arm in a sling raised above my head (very uncomfortable) and the worry that i could very well lose my arm from the elbow down. i also had to endure several months of intense physiotherapy.
the water jetting association has some good information on these types of injuries and if you put in a google search i am sure there are some gruesome pictures.
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Posted By EE
Thanks to the 4 respondents - between you, I was able to find exacatly what I needed
Eternally grateful
EE
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