Gas burning orange?...
 

Gas burning orange? Gas experts?

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Doing my weekend duties, burning bits of pig for the various women of the house this morning, I noticed the gas hob burning with a very orange flame. I checked the hob was correctly assembled and tried a couple of the other hobs, all burning orange.

Is this a possible indicator of reduced supply pressure or a change to the gas mix/quality itself?

 
Posted : 11/12/2022 11:45 am
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could be down to humidity? IANAE

That said be very careful of Co2 as the orange flame signifies incomplete combustion, got a Co2 alarm?

 
Posted : 11/12/2022 11:53 am
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I recall from back at school, Bunsen burners burned orange if you shut off the air supply. By that logic, maybe there's a blockage in an air supply somewhere? (I don't actually know how gas hobs work... 😊)

 
Posted : 11/12/2022 11:58 am
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Nope, CO2 detector isn't complaining at all.

 
Posted : 11/12/2022 12:02 pm
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It's incomplete combustion. Open up some doors and windows immediately.

Could be high humidity in the room, so venting the room may sort it. If not, and you're sure the burners are clean and assembled correctly, could be gas pressure perhaps, and worthy of more investigation?

 
Posted : 11/12/2022 12:16 pm
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Our gas hob does this if we're cooking something really oily or fatty. Assume it's just oil/fat nebulised in the air getting burnt.

 
Posted : 11/12/2022 1:02 pm
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Could be fat from the bacon in the air. I'd think the O2 for combustion is just in th room and for that level to drop would be a real concern about your houses air flow.
No carbon MONoxde alarms you should be ok. NB I'm a chemist not a gas engineer.

 
Posted : 11/12/2022 1:08 pm
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CO rather than CO2.

 
Posted : 11/12/2022 1:15 pm
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Just checked again and it's back to a lovely blue flame, has got me wondering if the supply pressure was turned down earlier...

 
Posted : 11/12/2022 2:20 pm
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Orange flame suggests incomplete combustion, as mentioned above. I'd take the bits off the burner to get to the gas port and just check there isn't any kind of debris stuck down there.

 
Posted : 11/12/2022 2:36 pm
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I'm going with the bacon fat. I've had a roomful of Bunsen's burn orange when boiling salt solutions.
Was the bacon salty? Sodium ions will give an orange flame. Importantly did the sound of the flame change? A quieter burn will be from reduced oxygen.

 
Posted : 11/12/2022 2:41 pm