Is ips thread the same as npt thread?

IPS (Iron Pipe Size) threads and NPT (National Pipe Taper) threads are not the same, although they are related. IPS is a sizing standard for pipes, while NPT refers specifically to the tapered threading used on those pipes. NPT threads are designed to create a seal when tightened, whereas IPS primarily refers to the pipe's nominal size. However, IPS pipes often use NPT threads for connections, making them compatible in many applications.