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There is usually some sulphur compound in natural gas called mercaptan to produce a smell for safety reasons. In UK this is about 25ppm so this causes an acid dew point. Regards

I would still like to be sure that the vessel does not collapse when there is an earthquake, even if higher than code stresses are permitted.

At the very least you should include the area of both sides of the fins. You might also consider including the area of the fin tips and the area of the tube between the fins.

Any reason for not asking Cleaver?

Thanks Scotty, The initial press reports seem to suggest that the fire had taken out one cooling tower rather than two cells of one tower. As you suggest it seems it will be possible to re-route some piping to return the unit to service. Looking at photos it does not seem that the boilers have...

Does anybody know anything about this fire? Best Regards, athomas236

Dear All, Many thanks again for all your suggestions and comments which are helpful and thought provoking. The issue of noise associated with the skate ramp has been running for seven years. Although I have known about the issue for a number of years I was not aware about the nature of the...

Dear Both, Thank you for your responses. What I am trying to do is prove that the Parish Council are wrong when they say that the double ramp is insulated which is why I thought a simple hammer test would be sufficient. Apart from removing the plywood side panels from the double ramp and...

Dear All, Thank you for your comments and replies. Please accept apologies for being so slow in responding. I attach some photographs that show the general layout of the skate ramps. There are two quarter pipe ramps at each end with the central section comprising a spine, double ramp and a low...

Dear All, I live in a small village in the UK that has a skate board ramp that is causing a big nuisance to nearby residents. The garden fence of one resident being just 3 metres from the ramp. Does anyone know any regulations or Codes that apply in such circumstances. The Parish Council have...

why not just ask the valve supplier?

Question is very vague, need more details like ultimate analysis.

If I understand this correctly, you have a 30 year old OTSG that has been modified to some unknown extent and you want to calculate the boiler output at a reduced operating pressure and hence determine the required safety valve capacity. I assume that you have no particular experience in...

If you have 2xGTs and 1xWHB there is generally a section of duct between each GT and the WHB that is not shared with the other GT. Asuming that each GT doesnot have its own vent stack, then will there be a problem purging the non-shared section of duct when starting the second GT with one GT...

Well done ione, we used a similar approach to Kandil for monitoring main steam pipe stresses back in 1982. It is worth noting that with steam drums there are also temperature differences between the top and bottom sections because of different internal heat transfer co-efficients in the steam...

IRstuff is right, I remember making that mistake back in 1995. Best regards, athomas236

So what is your question. Best regards, athomas236

You could look at a pressure vessel design code such as ASME 8 or whatever the original design code was. Best regards, athomas236

On an occasion like this I would ask the boiler supplier. Best regards, athomas236

andrenov, Why not just wait for it to cool. Best regards, athomas236