Regarding the instrument setup for the fuel gas pipeline in the heating furnace
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2.11 The pressure measuring instruments for the perpetual flame fuel gas system shall be installed on the main pipeline behind the perpetual flame fuel gas flame arrester. 2.12 The pressure measuring instruments for the main fuel gas system shall be installed on the main pipeline behind the main fuel gas flame arrester. The above are Sinopec’s regulations regarding the fuel gas for heating furnaces. Is it required to install a separate pressure measuring instrument? Is there no separate pressure measuring instrument on the main fuel gas system? Do you mean the interlocking or the pressure measurement points for control? Furthermore, what is the purpose of having it installed behind the flame arrester?
When the pilot light of the heating furnace or the pressure of the main fuel gas is too low, the burner will go out, and a large amount of fuel gas will enter the furnace, increasing the risk of explosion; therefore, pressure measuring instruments must be installed. The pressure before the flame arrester does not reflect the pressure inside the furnace (as the flame arrester may become clogged), so such instruments should be placed after the flame arrester. It is not sufficient for pressure measuring instruments to merely provide an indicator or display; they are usually linked to an emergency shut-off valve on the fuel gas pipeline, which closes automatically when the fuel gas pressure drops significantly. The pressure of the fuel gas can usually be controlled by installing a self-acting pressure regulator.
Well said:,handshake
Setting a pressure point behind the flame arrester is to prevent backflow, right?
The pressure measurement should be placed behind the flame arrester, and it should form a low-low interlock with the shut-off valve