Combining thread-seal tape with a pipe dope compound can also overload threads. Excess application of PTFE tape can prevent mating threads from fully engaging, reducing the shear point of the threads. Overuse or misapplication of thread tape may be a hazard. Copper – contains copper granules and is certified as a thread lubricant but not a sealer.Gray – contains nickel, anti-seizing, anti-gailling and anti-corrosion, used for stainless pipes.Green – oil-free PTFE used on oxygen lines and some specific medical gasses.Pink – used on NPT threads 1/2 inch to 2 inch, safe for propane and other hydrocarbon fuels.Yellow – used on NPT threads 1/2 inch to 2 inch, often labeled "gas tape".White – used on NPT threads up to 3/8 inch.Thus, a “yellow TEFLON tape” was later introduced for such application.ĪSTM has broadened the specifications for PTFE tape colors: It is also known by the genericised trade-name Teflon tape while Teflon is in fact identical to PTFE, Chemours (the trade-mark holders) consider this usage incorrect, especially as they no longer manufacture Teflon in tape form Since many provincial/ state and local codes adopted the use of double density tapes when making connections for natural gas, the use of same color for two different thickness presented a challenge when time came to inspect a job. The tape is sold cut to specific widths and wound on a spool, making it easy to wind around pipe threads. Thread seal tape (also known as PTFE tape or plumber's tape) is a polytetrafluoroethylene (PTFE) film for use in sealing pipe threads. Third, it keeps the male and female threads from rusting together (a.k.a.Second, it acts as a filler to smooth out micro abrasions or surface irregularities on threads.First, the lubricant qualities allow male threaded pipe to be turned deeper into female threaded fittings to prevent leaks.The tape may have the effect of clogging the thread path, but it does not actually adhere to surfaces as a true sealant should. Strictly speaking, Teflon tape is not a thread sealant.
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