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flash fraction

English translation: The part that boils off immediately

08:17 Jul 7, 2016
English language (monolingual) [PRO]
Engineering (general)
English term or phrase: flash fraction
I was reading the article about explosion conditions for accidents with the transport of liquefied gas. Can anyone explain what "flash fraction" means? It is not a familiar term for me. Thank you in advance.

The first scenario (3a) is a complete rupture of the an LPG-vessel followed an instantaneous release of the flash fraction of the full quantity of LPG. The second scenario (3b) is a continuous release of propane gas due to a leak of limited size, see also Table 1.


More specific: if the release is larger than 1000 m3 gas, which corresponds with the flash fraction of 7.6 m3 LPG approximately, and the tunnel tube is no longer than 1500 m, the cloud length of explosive composition will be no longer that about 40 m.
leg4leg
Türkiye
Local time: 09:32
Selected answer:The part that boils off immediately
Explanation:
LPG is a mixture of hydrocarbons. Some of these (the fraction part) will boil off immediately (the flash part) if the pressure is suddenly reduced whereas some evaporate slower.
Selected response from:

Terry Richards
France
Local time: 08:32
Grading comment
Selected automatically based on peer agreement.
4 KudoZ points were awarded for this answer



SUMMARY OF ALL EXPLANATIONS PROVIDED
4 +3The part that boils off immediately
Terry Richards


  

Answers


1 hr   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +3
The part that boils off immediately


Explanation:
LPG is a mixture of hydrocarbons. Some of these (the fraction part) will boil off immediately (the flash part) if the pressure is suddenly reduced whereas some evaporate slower.

Terry Richards
France
Local time: 08:32
Works in field
Native speaker of: Native in EnglishEnglish
PRO pts in category: 32
Grading comment
Selected automatically based on peer agreement.

Peer comments on this answer (and responses from the answerer)
agree  Yasutomo Kanazawa
32 mins
agree  acetran
17 hrs
agree  Jörgen Slet
4 days
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