Therefore, use of tape as a thread sealant is generally not considered appropriate in fluid power (hydraulic) systems. Also, internal overhangs of loose material may constrict a joint or slough off and form a foreign body that could jam a valve seat. Combining thread seal tape with a pipe dope compound can also overload threads. Excess application of tape can prevent mating threads from fully engaging, reducing the shear point of the threads. Overuse or misapplication of thread seal tape may be a hazard. ( August 2023) ( Learn how and when to remove this template message) Unsourced material may be challenged and removed. Please help improve this section by adding citations to reliable sources. The wearer wraps a layer of tape around a plug and uses the jewelry, adding another layer every few days, thus gradually stretching the piercing. Thread seal tape is also commonly used in the stretching of body piercings, through a process known as taping, because it is inert and safe for this use. Thread seal tape is almost always applied by hand, although at least one machine is available for production wrapping of fittings. Parallel threads may not seal effectively with or without tape, as they are intended to be sealed by a gasket. Thread seal tape is appropriate for use on tapered threads, where the sealing force is a wedge action. Uses PTFE tape applied on an NPT fitting, in the direction of the threads. In Europe, the BSI standard BS-7786:2006 specifies various grades and quality standards of PTFE thread sealing tape.
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