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Dear sir/Madam I read many books, in all literature’s working in confined spaces oxygen levels 19.5 to 21% suggested. What happens if the oxygen levels are more than 21%
23rd December 2013 From India, Hyderabad
Dear Srikanth
If the Oxygen level is above 21% then it is well and good and if the O2 level is less than 19.5 then there are chances for breathing problem to those working in confined space. Further if the Oxygen level is beyond the tolerable level then there are chances of fire hazard. This Fire Hazard can be well explained by our Safety Professional members. So let me place a request to the safety professional members to give suitable reply to this query.
24th December 2013 From India, Kumbakonam
Dear Bhaskar

Thanks for leading me into the thread. Nowadays I am finding very less participation of the forum members into the EHS Forum of CiteHR and that's the reason behind my less participation. Many persons here only seeks what they want from the forum and not feels spending time in involving other threads/discussions, which I feel very painful... There was a time I enjoyed participating and learning from CiteHR... I believe the above said must be one of the reasons for not participating in this forum by our great seniors like Mr. Keshav Pillai.

Now come to the topic. Mr. Keshav Pillai only in one of our earlier discussions clarified very nicely the answer which I am just copy pasting for the benefit of those who missed the earlier discussion.

"Dear Dipil,

As a health hazard it has been discovered that delivery of higher concentration and high pressure can cause hypoxia from pulmonry damage, as well as causing visual damage and central nervous derangement.

Oxygen in excess of 23.5% is usually considered s a fire hazard. Clothing and hair can easily catch fire in O2 enriched armosphere. Textiles can burn fiercely when they are enriched with oxygen.

O2 enrichment happens very rarely. By accident, Chemical reactions, passing purposely and failing to monitor etc there are chances of O2 enrichment.

Tool box meetings are conducted on specific topic. It has a different purpose. It is a kind of training as such. However tailboard meeting is to instruct, clarify and make sure that everyone involved is clear of what to do about the job at hand just before starting it.


Kesava "

I love to spend time even between by busy schedules here in this meaningful forum if minded people for knowledge sharing come forward with an assurance of at least participating in all the discussions, it's not u should be able to give solutions...At least a kind of togetherness...I am also not assuring to give answers to all the query... But yes, we can definitely learn and grow together...

Seriously looking forward to hear from the other sharing minded forum members...Lets try to make it alive again...
24th December 2013 From India
Dear All
I recollect the incident of three Apollo 7 astronauts who burnt to death because their spacecraft
cabin had very high percentage of Oxygen. Thereafter NASA decided not to have high percentage
of oxygen in the spacecraft cabin.
Lakshminarayana Rao
26th December 2013 From India, Bangalore
Dear Sir
Thanks for the response. It's really nice to know that still you closely watching to the discussions in this forum...
I am considering you as one of my ideal even though we never speak or meet....You are my inspiration in the field of Safety... I learn even the basics of safety from you through this forum and really shall thankful to you forever…

26th December 2013 From India
Dear All ,
Dipilji is right . From last few months our SHE forum is not moving as earlier . Due to some unavoidable reasons I am also not participated in last few discussions . We all also not raising critical safety concerns that's why Our forum Safety Guru Mr.Kesava sir not participating . All are requested to join the forum , spare a time for SHE concerns make this forum again very Live .
15th January 2014 From India, Thana
Dear Member
Oxygen is toxic in nature if the concentration is more than 21%
In disease condition we use higher concentration for short duration but not for longer duration. In high concentration oxygen produces fibrosis of the lung.
Lastly oxygen is not inflammable but it assist in burning. So when there is fire availability of oxygen will make the condition worse.
20th January 2014 From India, Chennai
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