Double Block and Vent for Fuel Gas Pipe To Burner Heater
Double Block and Vent for Fuel Gas Pipe To Burner Heater
(OP)
Hello,
I know, according to NFPA 86 (Ovens and Furnaces) that we need to install a double block and vent on-off valves in the pipe of fuel gas that will be burned in the heater. That is what we have for Fuel Gas.
But, in adittion, we also burn some sour gas (independent pipe to burner) from the amine regenerator and from sour gas stripping unit. In this case we have just one on-off valve and one on-off vent that opens to flare. Is that enough or for this kind of service we to install an additional on-off block valve?
Best Regards
I know, according to NFPA 86 (Ovens and Furnaces) that we need to install a double block and vent on-off valves in the pipe of fuel gas that will be burned in the heater. That is what we have for Fuel Gas.
But, in adittion, we also burn some sour gas (independent pipe to burner) from the amine regenerator and from sour gas stripping unit. In this case we have just one on-off valve and one on-off vent that opens to flare. Is that enough or for this kind of service we to install an additional on-off block valve?
Best Regards





RE: Double Block and Vent for Fuel Gas Pipe To Burner Heater
RE: Double Block and Vent for Fuel Gas Pipe To Burner Heater
The rules that applies to these situations are not always consistent. In our case, the rules strictly only apply to a stream that contains hydrocarbon (even though H2S also burns).
RE: Double Block and Vent for Fuel Gas Pipe To Burner Heater
Also, what about the fuel gas that goes to the pilots (ignitor)? Is it valid to put the double block and vent valves up stream the interconection between the main fuel gas pipe and the pilot fuel gas piepe in order to avoid to install additional double block and vent valves in the fuel gas pipe that goes to pilots?
Regards