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Health and Safety Index

Health and Safety:

Issues and information related to health and safety.

 

The following is offered without comment.

 

Aracruz, JANUARY 12, 2001

Provided by LUIS ORTEGA TROTTER 

HYDROBLASTING

 

TEST WITH AND WITHOUT (KEVLAR®) PROTECTION SUIT

 

 

Test were done in off-shore SS45-ATLANTIC STAR ( north from Rio de Janeiro – Brasil ) ,from 23 to 25 March 2000 with UHP pump ( 30,000 psi ) using a rotary pneumatic gun with 4 sapphire nozzle rotating aprox. 2,500 RPM, and distance of 40 mm (1.5 inches) between  nozzle and test . Translation velocity (from side to side) of the gun 0.0833 m/sec ( 0.3 Km /hr, 3.24 inches/sec ) The jet velocity 2210 Km/hr (614 m/sec, 2,030 ft/sec) The normal translation velocity in the field would be 12 times higher, or closer to 1 m/sec. That means the real damage would be  much more than what appears in this test. A piece of  pig rib was used because it is similar to human body.  We named the speciman rib “John.”

Kelvar is a registered trademark of Du Pont.

 

 PHOTOS OF  THE TEST  USING SPECIAL SUIT ( KEVLAR® )

Photo 01 – Pig rib was fixed with nails  to a  wood table

Photo  02 –  Pig rib covered with sail cloth Kevlar® suit and yellow  PVC cloth. We named the test speciman:John (Joăo)

 

Photo 3 – Passing the rotary gun over the test with 0,083m/sec ( 0,3 Km/hr )

Photo 04 – After UHP  jetting , the PVC cloth, was destroyed.  First and second layer of Kevlar suit has been cut. (Total of 7 Kevlar layers )

Photo 05 – A closer view of the Kevlar suit

Photo 06 – The interior side of the Kevlar suit:  We observe no destruction,only wet.

Photo 07 – John ( Joăo ), our pig rib, is safe....The rib without damage

 


                                   TEST PHOTOS WITHOUT KEVLAR SUIT

 

Photo 08 – Preparing the test , only PVC and sail cloth protection

 

Photo 09 –  John ( Joăo )  is pepared for the UHP test using only PVC  and sail cloth

 

Photo 10 –  Passing the UHP gun over the test

Photo 11 – Total cut over PVC and sail cloth  and also cutting all the flesh

 

Photo  12 –  Closer .......

Photo 13 – We  see about 5 milimeter  cut of the wood table

 

Photo 14 –  We anounce condolences from our nice friend John, the pig rib.

Inform of the medical Institute:

John, 24 years old died today in this hospital. This heart , right lung were seriously damage with  aprox. 0,8 lts of water at a velocity of 2210 Km/hr

   

CONCLUSION:

UHP worker protect your life!!!

 

LUIS ORTEGA TROTTER
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