Pads38
Well-Known Member
If you want to find out what adding oxygen to a fire does check out:
http://www.doeblitz.net/ghg/
-- how to light a barbeque in 3 seconds!
http://www.doeblitz.net/ghg/
-- how to light a barbeque in 3 seconds!
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Sea survival and is oxygen flammable???
- Thread starter dralex
- Start date
peterb
Well-Known Member
It's not just adding oxygen. There was a proposal to reduce the pressure in the Space Laboratory by reducing the partial pessure of nitrogen, keeping that of the oxygen the same. After all, with the same oxygen pressure the fire would still burn at the same rate, wouldn't it?
Not when we tried it (in zero-g, too). The fire spread rate was more than doubled.
Not when we tried it (in zero-g, too). The fire spread rate was more than doubled.
wagenaar
Well-Known Member
It was pointed out that the nitrogen acts as a coolant during burning in air. Carbon-dioxyde has a similar function when used to stop the burning. Decreasing the nitrogen-pressure, but keeping the oxygen-pressure constant, means that there is less nitrogen to act as coolant and logically the burning will be fiercer.
peterb
Well-Known Member
Exactly.
bdsweeting
Well-Known Member
According to the BOC Safety Sheet O2 is "Non-Flammable"
Safety Data Sheet
Oxygen MSDS Nr : 301-00-0005BOC(U) Version : 1.04 Date : 25/03/2002 BOC, Priestley Road, Worsley, Manchester M28 2UT 0800 02 0800 1 IDENTIFICATION OF THE SUBSTANCE/PREPARATION AND OF THE COMPANY Product name Oxygen Chemical formula O2 Company identification see heading and/or footer Emergency phone numbers see heading and/or footer 2 COMPOSITION/INFORMATION ON INGREDIENTS Substance/Preparation Substance. Components/Impurities Contains no other components or impurities which will influence the classification of the product. CAS Nr 07782-44-7 EEC Nr (from EINECS) 231-956-9 3
<span style="color:blue"> HAZARDS IDENTIFICATION </span> Hazards identification Compressed gas Oxidant. Strongly supports combustion. May react violently with combustible materials.
4 FIRST AID MEASURES Inhalation Not hazardous Ingestion Ingestion is not considered a potential route of exposure.
5 <span style="color:blue"> FIRE FIGHTING MEASURES </span> Specific hazards Supports combustion. Exposure to fire may cause containers to rupture/explode.<span style="color:red"> Non flammable</span> Hazardous combustion products None Suitable extinguishing media All known extinguishants can be used. Specific methods If possible, stop flow of product. Move away from the container and cool with water from a protected position. Special protective equipment for fire fighters None. 6 ACCIDENTAL RELEASE MEASURES Personal precautions Evacuate area. Ensure adequate air ventilation. Eliminate ignition sources. Environmental precautions Try to stop release. Prevent from entering sewers, basements and workpits, or any place where its accumulation can be dangerous. Clean up methods Ventilate area. 7 HANDLING AND STORAGE Handling and storage Use no oil or grease. Open valve slowly to avoid pressure shock. Segregate from flammable gases and other flammable materials in store. Suck back of water into the container must be prevented. Do not allow backfeed into the container. Use only properly specified equipment which is suitable for this product, its supply pressure and temperature. Contact your gas supplier if in doubt. Keep away from ignition sources (including static discharges). Refer to supplier's container handling instructions. Keep container below 50°C in a well ventilated place. 1 of 1
 Copyright BOC 2003
2 of 2
 Copyright BOC 2003
8 EXPOSURE CONTROLS/PERSONAL PROTECTION Personal protection Do not smoke while handling product. Avoid oxygen rich (>21%) atmospheres. Ensure adequate ventilation. 9 PHYSICAL AND CHEMICAL PROPERTIES Molecular weight 32 Melting point -219 °C Boiling point -183 °C Critical temperature -118 °C Relative density, gas 1.1 (air=1) Relative density, liquid Not applicable. Vapour Pressure 20°C Not applicable. Solubility mg/l water 39 mg/l Appearance/Colour Colourless gas Odour None Autoignition temperature Not applicable Flammability range Oxidiser. Other data Gas/vapour heavier than air. May accumulate in confined spaces, particularly at or below ground level. 10 STABILITY AND REACTIVITY Stability and reactivity May react violently with combustible materials May react violently with reducing agents. Violently oxidises organic material. 11 TOXICOLOGICAL INFORMATION General No toxicological effects from this product. 12 ECOLOGICAL INFORMATION General No ecological damage caused by this product. 13 DISPOSAL CONSIDERATIONS General To atmosphere in a well ventilated place. Do not discharge into any place where its accumulation could be dangerous. Contact supplier if guidance is required. 14 TRANSPORT INFORMATION UN Nr 1072 Class/Div 2.2 Subsidiary risk 5.1 ADR/RID Item Nr 2,1° O ADR/RID Hazard Nr 25 Labelling ADR Label 2: non flammable non toxic gas Label 05: fire intensifying risk. Other transport information Avoid transport on vehicles where the load space is not separated from the driver's compartment. Ensure vehicle driver is aware of the potential hazards of the load and knows what to do in the event of an accident or an emergency. Before transporting product containers ensure that they are firmly secured and: - cylinder valve is closed and not leaking - valve outlet cap nut or plug (where provided) is correctly fitted - valve protection device (where provided) is correctly fitted - there is adequate ventilation. - compliance with applicable regulations.
3 of 3
 Copyright BOC 2003
15 REGULATORY INFORMATION Number in Annex I of Dir 67/548 Not included in Annex I. EC Classification O;R8 -Symbols O: Oxidising Labelling of cylinders -Symbols Label 2: non flammable non toxic gas Label 05: fire intensifying risk. -Risk phrases R8 Contact with combustible material may cause fire. -Safety phrases S9 Keep container in well ventilated place. S17 Keep away from combustible material. 16 OTHER INFORMATION Ensure all national/local regulations are observed. Ensure operators understand the hazard of oxygen enrichment. Before using this product in any new process or experiment, a thorough material compatibility and safety study should be carried out. Details given in this document are believed to be correct at the time of going to press. Whilst proper care has been taken in the preparation of this document, no liability for injury or damage resulting from its use can be accepted.
Safety Data Sheet
Oxygen MSDS Nr : 301-00-0005BOC(U) Version : 1.04 Date : 25/03/2002 BOC, Priestley Road, Worsley, Manchester M28 2UT 0800 02 0800 1 IDENTIFICATION OF THE SUBSTANCE/PREPARATION AND OF THE COMPANY Product name Oxygen Chemical formula O2 Company identification see heading and/or footer Emergency phone numbers see heading and/or footer 2 COMPOSITION/INFORMATION ON INGREDIENTS Substance/Preparation Substance. Components/Impurities Contains no other components or impurities which will influence the classification of the product. CAS Nr 07782-44-7 EEC Nr (from EINECS) 231-956-9 3
<span style="color:blue"> HAZARDS IDENTIFICATION </span> Hazards identification Compressed gas Oxidant. Strongly supports combustion. May react violently with combustible materials.
4 FIRST AID MEASURES Inhalation Not hazardous Ingestion Ingestion is not considered a potential route of exposure.
5 <span style="color:blue"> FIRE FIGHTING MEASURES </span> Specific hazards Supports combustion. Exposure to fire may cause containers to rupture/explode.<span style="color:red"> Non flammable</span> Hazardous combustion products None Suitable extinguishing media All known extinguishants can be used. Specific methods If possible, stop flow of product. Move away from the container and cool with water from a protected position. Special protective equipment for fire fighters None. 6 ACCIDENTAL RELEASE MEASURES Personal precautions Evacuate area. Ensure adequate air ventilation. Eliminate ignition sources. Environmental precautions Try to stop release. Prevent from entering sewers, basements and workpits, or any place where its accumulation can be dangerous. Clean up methods Ventilate area. 7 HANDLING AND STORAGE Handling and storage Use no oil or grease. Open valve slowly to avoid pressure shock. Segregate from flammable gases and other flammable materials in store. Suck back of water into the container must be prevented. Do not allow backfeed into the container. Use only properly specified equipment which is suitable for this product, its supply pressure and temperature. Contact your gas supplier if in doubt. Keep away from ignition sources (including static discharges). Refer to supplier's container handling instructions. Keep container below 50°C in a well ventilated place. 1 of 1
 Copyright BOC 2003
2 of 2
 Copyright BOC 2003
8 EXPOSURE CONTROLS/PERSONAL PROTECTION Personal protection Do not smoke while handling product. Avoid oxygen rich (>21%) atmospheres. Ensure adequate ventilation. 9 PHYSICAL AND CHEMICAL PROPERTIES Molecular weight 32 Melting point -219 °C Boiling point -183 °C Critical temperature -118 °C Relative density, gas 1.1 (air=1) Relative density, liquid Not applicable. Vapour Pressure 20°C Not applicable. Solubility mg/l water 39 mg/l Appearance/Colour Colourless gas Odour None Autoignition temperature Not applicable Flammability range Oxidiser. Other data Gas/vapour heavier than air. May accumulate in confined spaces, particularly at or below ground level. 10 STABILITY AND REACTIVITY Stability and reactivity May react violently with combustible materials May react violently with reducing agents. Violently oxidises organic material. 11 TOXICOLOGICAL INFORMATION General No toxicological effects from this product. 12 ECOLOGICAL INFORMATION General No ecological damage caused by this product. 13 DISPOSAL CONSIDERATIONS General To atmosphere in a well ventilated place. Do not discharge into any place where its accumulation could be dangerous. Contact supplier if guidance is required. 14 TRANSPORT INFORMATION UN Nr 1072 Class/Div 2.2 Subsidiary risk 5.1 ADR/RID Item Nr 2,1° O ADR/RID Hazard Nr 25 Labelling ADR Label 2: non flammable non toxic gas Label 05: fire intensifying risk. Other transport information Avoid transport on vehicles where the load space is not separated from the driver's compartment. Ensure vehicle driver is aware of the potential hazards of the load and knows what to do in the event of an accident or an emergency. Before transporting product containers ensure that they are firmly secured and: - cylinder valve is closed and not leaking - valve outlet cap nut or plug (where provided) is correctly fitted - valve protection device (where provided) is correctly fitted - there is adequate ventilation. - compliance with applicable regulations.
3 of 3
 Copyright BOC 2003
15 REGULATORY INFORMATION Number in Annex I of Dir 67/548 Not included in Annex I. EC Classification O;R8 -Symbols O: Oxidising Labelling of cylinders -Symbols Label 2: non flammable non toxic gas Label 05: fire intensifying risk. -Risk phrases R8 Contact with combustible material may cause fire. -Safety phrases S9 Keep container in well ventilated place. S17 Keep away from combustible material. 16 OTHER INFORMATION Ensure all national/local regulations are observed. Ensure operators understand the hazard of oxygen enrichment. Before using this product in any new process or experiment, a thorough material compatibility and safety study should be carried out. Details given in this document are believed to be correct at the time of going to press. Whilst proper care has been taken in the preparation of this document, no liability for injury or damage resulting from its use can be accepted.
nedmin
Well-Known Member
When I worked in the steel industry contractors left an oxygen cylinder next to the red hot steel coming out of a rolling mill, due to expansion there was an almighty bang and the cylinder split down the middle from top to bottom(it was stood vertical) there was no fire just the bang,from the cylinder exploding due to expansion, so oxygen on its own is not flammable if it had happened in a flour mill ,now thats a different story.!!