I have a question regarding "11.4.4 Fuel Piping." from NFPA 20, 2010 Edition.
11.4.4.1 reads, "Flame-resistant reinforced flexible hose listed for this service with threaded connections shall be provided at the engine for connection to the fuel system piping."
Is the use of "flame-resistant...
Does the current NFPA 20 allow for the use of flexible tubing or hoses on the pressure sensing lines or are they required to be rigid?
The 2007 NFPA 20 reads: "5.29.3 The pressure-sensing line shall be brass, copper, or series 300 stainless steel pipe or tube, and the fittings shall be of 1/2in...