How to apply plumbing tape?

Update:12-06-2020
Summary:

When applying thread tape, the first and most crucial j […]

When applying thread tape, the first and most crucial job is always to make sure that you’re using the correct sort of PTFE tape for the application and setting you’re going to be putting it to work in.PTFE Thread Seal Tape Manufacturers

Once that has been confirmed, you should then take care to follow these relatively straightforward steps in order:

First, clean the threads of the duct joint you’re going to be applying the PTFE tape to. Existing pipes will likely have traces of dirt, rust, grease or other pipe sealant left on them from previous applications. In the case of brand new lengths of conduit, the threads may not have been cleaned thoroughly after machining, meaning there could be metal shavings or factory oils present that will negatively impact on the integrity of the seal formed. It’s possible that you may need a specialised product such as an industrial-strength pipe cleaner to fully remove some stubborn or harsh solvents and greases.

 

Allow the cleaned threads of the joint to dry out very thoroughly before attempting any further work on them. This can usually be achieved with the conscientious use of paper towels, but it’s also wise to leave them out to fully air-dry if you can. Either way, you must be sure that no beads of moisture remain in even the tightest channels between or around threads that will be mated together.

Once the fittings are completely dry, you can begin wrapping your PTFE sealant tape around the threads. Start one thread down from the open end, to prevent any scraps of material sheared off during mating from entering the duct. Wrap in the same descending direction as the threads, working your way back towards the pipe - this is key to preventing unhelpful distortions, such as concentrated bunching or unravelling of the tape, as the opposing ends of the joint come together.

As you work your way down the threads, you should overlap the layers of tape by about half their width to ensure full coverage all the way around. It’s important not to use too much; again, while some deformation of the material between threads is helpful in creating a tighter seal, too much distortion can end up having the opposite effect. As you wrap, pull tightly enough to maintain sufficient tension such that the threads remain clearly visible as defined ridges, even through thicker or more opaque tape varieties.

Continue in this manner until you reach about one full wrap past the bottom of the last thread. Finish the final wrap by cutting and sticking down the final inch or so, making sure no loose tape is left hanging or improperly adhered, and the cut off end is pressed down as smoothly