N

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A,  B,  C,  D,  E,  F,  G,  H,  I,  J,  K,  L,  M,  N,  O,  P,  Q,  R,  S,  T,  U,  V,  W,  X,  Y,  Z

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NACE – National Association of Corrosion Engineers

NDE – Non-Destructive Examination

NEMA – National Electrical Manufacturers Association

NPS

NPT — National Pipe TapereD

NRS

NEEDLE VALVE

NIPPLE

NON-DESTRUCTIVE TESTS

NON—RISING STEM

NORMALLY CLOSED SOLENOID VALVE

NORMALLY OPEN SOLENOID VALVE

NORSOK

NORSOK STANDARDS