VoDich
Mechanical
- May 31, 2010
- 15
I'm replacing a couple of 500 HP steam boilers that provide heating and domestic hot water for a campus in California. Main fuel is natural gas. Backup fuel is fuel oil #2 (diesel). I believe these boilers were installed in the late 80's. There is a large diesel storage tank with diesel supply piping from the storage tank to these boilers. However, there is not a diesel return piping from the boilers back to the storage tank. No day tank in between either. The boiler rep is telling me that I'm required to have a diesel return piping from the boiler back to the storage tank. My questions are:
1) Am I required to have a diesel return piping from the boilers back to the diesel storage tank? If so, which codes or standards have this requirement? NFPA? ASME?
2) Can one small (100-200 gallons) diesel day tank be placed near these 2 boilers to run diesel return piping from the boilers to? Would this be adequate to not have to run a diesel return piping all the way back to the large diesel storage tank that is several hundred feet away?
3) What really happens to the boiler or burner if there isn't a diesel return piping, provided that the flowrate and pressure at the burner are adequate?
This isn't the first site where I have seen boilers without a diesel return piping. That's why I'm a little confused on why the boiler rep and day tank rep are telling me that it is required, yet a few sites I have seen do not have it.
Thanks!
1) Am I required to have a diesel return piping from the boilers back to the diesel storage tank? If so, which codes or standards have this requirement? NFPA? ASME?
2) Can one small (100-200 gallons) diesel day tank be placed near these 2 boilers to run diesel return piping from the boilers to? Would this be adequate to not have to run a diesel return piping all the way back to the large diesel storage tank that is several hundred feet away?
3) What really happens to the boiler or burner if there isn't a diesel return piping, provided that the flowrate and pressure at the burner are adequate?
This isn't the first site where I have seen boilers without a diesel return piping. That's why I'm a little confused on why the boiler rep and day tank rep are telling me that it is required, yet a few sites I have seen do not have it.
Thanks!