For NPT threads a sealant compound or Polytetrafluoroethylene (PTFE) tape must be used for leak-free seal. For NPTF no sealant is needed for a leak tight connection. Characteristics of NPT (also known as ANSI/ASME B1.20 1 Pipe Threads, General Purpose): • the angle between the taper ...
NPTF - National Pipe Thread Tapered Fine - also called Dryseal American National Standard Taper Pipe Thread -is a U.S. standard for tapered threads used to join pipes and fittings is defined by ANSI B1.20.3 For NPT threads a sealant compound or Polytetrafluoroethylene (PTFE) tape must be ...