LPG Loading Incident and Blocking Materials

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Questions and Answers

The incident occurred at 9:45 AM.

True (A)

The driver was unloading LPG when the incident occurred.

False (B)

The coupling failure caused a release of oxygen.

False (B)

The driver survived the incident.

<p>False (B)</p> Signup and view all the answers

The investigation revealed the coupling thread was in good condition.

<p>False (B)</p> Signup and view all the answers

Sandbags are effective because they create a perfect seal on any surface.

<p>False (B)</p> Signup and view all the answers

Elastomer mats are used to seal drains.

<p>True (A)</p> Signup and view all the answers

All drains can be completely encircled by elastomer berms.

<p>False (B)</p> Signup and view all the answers

Oil Sorb absorbs only oil.

<p>False (B)</p> Signup and view all the answers

Polypropylene can absorb 25 times its weight in oil and floats on water.

<p>True (A)</p> Signup and view all the answers

Flashcards

LPG Release Incident

Spontaneous release of LPG led to a fireball, severely injuring and resulting in the death of the driver two days later.

Coupling Failure Causes

Thread in coupling was badly worn, lugs were deformed, indicating possible misuse such as hammering.

Sandbags as Blocking Material

Used to block the flow of spill, but achieving a good seal can be difficult.

Spill Absorbents

Absorbents, such as Oil Sorb and polypropylene are substances used to soak up spilled oils.

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Oil Sorb (Diatomaceous Earth)

Diatomaceous earth, absorbs its weight in oil but also absorbs water and doesn't float.

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Polypropylene Absorbent

PP absorbs 25x its weight in oil, absorbs ONLY oil, and floats on water even when saturated.

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Study Notes

  • At 9:45, an incident occurred during LPG loading where the coupling connecting the loading arm to the vehicle failed.
  • The failure caused a spontaneous release of LPG which ignited, resulting in a fireball that engulfed the driver.
  • The driver suffered severe injuries and died two days later.
  • The investigation revealed that the coupling's thread was badly worn and the lugs were deformed.
  • It is suspected that the driver used a hammer to tighten the coupling.

Blocking Materials

  • Sandbags and elastomer mats/berms are two types of blocking materials.

Sandbags

  • Used by placing in the path of flow, butted tightly together to form a barrier.
  • Limitations include difficulty in achieving a good seal between bags and the ground.
  • Absorbent material should be used to catch leakage.
  • Each bag weighs about 70 pounds, making them difficult to move for some individuals.

Elastomer Mats

  • Used by placing over storm or sanitary drains to seal them.
  • Limitations include potentially not completely covering larger drains.
  • They may not form a perfect seal on rough surfaces or along curbs.

Elastomer Berms

  • Used by placing in the path of flow to form a barrier, or around drain openings.
  • Limitations include potentially not completely encircling larger drains.
  • They may not form a perfect seal on rough surfaces or along curbs.

Spill Kits

  • Spill kits are established at oil storage locations subject to SPCC regulations.
  • The quantity of spill materials depends on the volume of oils stored at each location.
  • Spill kit materials are used to absorb spilled oils and block their flow.

Absorbents

  • Diatomaceous earth (Oil Sorb) and polypropylene are two types of absorbents.
  • Oil Sorb is supplied in 25-pound paper bags.
  • Polypropylene is supplied as socks, pillows, and pads.

Oil Sorb

  • Used by spreading on the leading edge of an oil spill and working back to the source.
  • Can absorb its weight in oil.
  • It absorbs both water and oil and does not float on water.

Polypropylene

  • Used by spreading on the leading edge of an oil spill and working back to the source.
  • Can absorb 25 times its weight in oil.
  • It only absorbs oil and floats on water, even when saturated.

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