Pipe sealant with Teflon

In pipe sealing, anaerobics are high-performance alternatives to poly tetrafluoroethylene tape or pipe dopes, and have been approved for portable water systems worldwide. Indeed, Loctite s original Pipe Sealant with Teflon has been copied by many companies and become an industry standard. Anaerobics also lubricate a joint during assembly and can seal a wide range of thread styles and designs. 

Initially, the as-received pump could not pass a 13.8-bar (200 psig) static pressure test at ambient temperature. Consequently, the pump was returned to the manufacturer for extensive seal modifications. Upon receiving the modified pump, the unit was placed into service for a hot shakedown test with C30 oil at 175 psig pressure under the present experimental setup. The modified seal continued to leak at a small but acceptable rate on the order of 1 g/min. However, leak problems were encountered in the threaded seal of the stator and the pump housing. The stator was resealed with a thick Teflon tape and a high-temperature pipe sealant that initially slowed the total system leaks to less than 50 g/h. 

B. Pipe Joints. Good joints suitable for vacuum or pressure applications can be made by means of tapered pipe thread joints in heavy-walled tubing. Unlike all of the joints discussed so far, the seal is made in the threads of this joint. The threaded portions of both the male and female pipe joint are tapered, and as a result the inner and outer threads are wedged into each other when they are screwed together (Fig. 10.9). To achieve a good seal the male pipe threads are wrapped with two layers of Teflon pipe tape, which serves the role of sealant and... 

---