Shanghai Rolling Pipe threads tech Ltd is manufacturer of Black Seamless Pipe Nipples. With NPT and BSP Pipe threads Pipe Nipples at our factory are manufactured with special rolling threads which make the profile of the pipe threads perfect. In Rolling Pipe threads the Pipe getting perfectly connected with female fitting and make it easy to connect. Rolling Pipe threads creates strong connection, high in quality, easy to connect, Long in life with no leakage and rust.