N
National Fire Protection Association (NFPA), 618–619, 677
Natural circulation, See Forced circulation
Natural gas, 688
Natural oxidation, 658–659
Natural water circulation, 72
Natural-draft cooling tower, 120
Near-atmospheric pressure, 618
Negative temperature coefficient, 249
Net Positive Suction Head (NPSH), 110–111
Network
control and communications, 229–232
interface layer, 448
network-connecting devices, 448
networking capability, 321
Transmission Technologies, 450–456
Nickel alloys, 148–149
Nitrogen, 652
Noise susceptibility level (NSL), 820
Noise-minimizing techniques, 820
Nominal bore (NB), 787
Non-feedback control, 673
Nonflammable fluid, See Fire retardant fluid (FRF)
Nonreturn valve (NRV), 10, 73, 163–164, 778
Normal temperature and pressure (NTP), 239 ...

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