IPS Versus NPT Pipe Thread Standards: What Is the Difference?

[TomBrook11232]

IPS Versus NPT Pipe Thread Standards: What Is the Difference?


What is the difference between IPS and NPT threads?

[Kelly_Bramble]

IPS is Iron Pipe Straight thread. It's meant to seal on a washer (like the threads the hose for your toilet or faucets attach to). NPT is a tapered thread, designed to seal on the threads, which is why you put pipe tape on them - to lubricate them and help the threads deform and create a seal.

IPS threads are also a generic name for NPSH or NPSM Threads " American National Straight Pipe Threads"

http://www.engineersedge.com/fluid_f...eads_13376.htm

[Cragyon]

IPS is old school