Recent content by sizgalil

Thanks LittleInch. Sorry for being so laconic. Will try elaborate. The author is discussing trapped air pockets in a liquid lines. He mentions that the water and the air pockets are at the same pressure when performing a pressure test in a pipe against a closed valve. He mentions that the...

Hi. I read in "Piping and Engineering" by George Antaki the following example: Can anybody explain how the trapped air pressure can rise above the hydraulic pressure? Thanks?

Hi. Does anyone know what the definitions of AC (Accuracy Class) and SG (lock-up pressure class) are with regards to pressure regulators and slam shut valves? Thanks!

Thanks. The air content in the calculated SNG mixture is way beyond the HEL of the LPG. So, the mixture is not explosive. Of course the mixing unit has to be well designed to ensure this. I in contact with the burner manufacturer to try get answers regarding the orifice modification and...

Hi guys. Hope someone can help on the following issue. Our client wishes to backup the NG with SNG (LPG and Air) that supplied to a mono-fuel burner. I calculated the Wobbe Index of the NG and of the LPG and determined the correct LPG-Air ratio required to attain an identical Wobbe Index of...

I'm pretty sure it's output but will make sure. Thanks so much.

So let me see if I've got this right. A boiler needs a burner larger than its capacity in order to overcome the efficiency of the boiler. Wouldn’t it be necessary to also account for the burners efficiency? So that if the burner is 10 million, the gas flow should actually be let say 11 million?

Thanks Littleinch. Can't a burner much larger than a boiler burn the boiler to ashes?

Thanks Katmar. I will try clarify my question. The boilers are actually rated in steam output such as 10 ton of steam per hour. This is equivilent to about 6,500,000 kcal/hr. Now often I notice that such size boilers are equipped with a 10,000,000 kcal/hr burner. Why is this and should the gas...

Hi there. Does anyone know if the flow of natural gas to a steam boiler should be determined by the boiler's capacity or rather by it's burner's capacity which is usually substantially bigger? Will the burner not operate at a higher capacity than that of the boiler in order to overcome losses...

PEDARRIN2 thanks so much. I use the equations rather than the tables which as you mentioned are limitting.

Hi, Does anyone know whether the hybrid pressure method for gas pipe sizing as described in ANSI Z223.1-127, can be used for pressures above 2 psi upstream of the regulators? Thanks a million.

TBP, when you say the heatloss from the surface includes evaporation, convection, and radiation. Do you know if all these factor are taken in account in the Burnham helper. The book does not mention any details regarding RH or solar radiation?

TBP sorry. I found the page - 42.

Thanks. Downloaded the Burnham helper. Can't find the chart & calcs you've referred to. Do you know in what chapter it appears?