CHINA CUSTOM NPT PIPE NIPPLES SCH40/SCH80 MANUFACTURER

https://www.tcpipefittings.com/products/npt-pipe-nipples-sch40-sch80.html

WHAT IS NPT PIPE NIPPLES?

NPT is short of American National Standard Pipe Thread standards, which is used on threaded pipes and pipe fittings. They include both tapered and straight thread series for various purposes including rigidity, pressure-tight sealing, or both.