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. Copper: contains copper granules and is certified as a thread lubricant but not a sealer.Gray: contains nickel, anti-seizing, anti-galling, 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 potable water. 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.yellow reels for gas, and green for oxygen. In the UK, the tape is used from coloured reels, e.g. These color-codes for thread sealing tape were introduced by Bill Bentley of Unasco Pty Ltd in the 1970s. It is often used to correspond to color coded pipelines (US, Canada, Australia, and New Zealand: yellow for natural gas, green for oxygen, etc.). Thread seal tape used in plumbing applications is most commonly white, but it is also available in various colors. Although PTFE itself is suitable for use with high-pressure oxygen, the grade of tape must also be known to be free from grease. Relevant standards may vary between industries tape for gas fittings (to UK gas regulations) is required to be thicker than that for water. The second standard, A-A-58092, is a commercial grade which maintains the thickness requirement of MIL-T-27730A and adds a minimum density of 1.2 g/cm 3. MIL-T-27730A (an obsolete military specification still commonly used in industry in the US) requires a minimum thickness of 3.5 mils and a minimum PTFE purity of 99%. There are two US standards for determining the quality of any thread seal tape. Types PTFE tape used for different sized fittings PTFE tape for natural gas Typically the tape is wrapped in the same direction the male threads go for tightening and is commonly used commercially in applications including pressurized water systems, central heating systems, and air compression equipment. It also protects the threads of both pieces from direct contact with each other and physical wear and helps seal and prevent leaks from the connection. The tape also works as a deformable filler and thread lubricant, helping to seal the joint without hardening or making it more difficult to tighten, and instead making it easier to tighten. Thread seal tape lubricates allowing for a deeper seating of the threads, and it helps prevent the threads from seizing when being unscrewed. 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, Teflon tape, or plumber's tape) is a polytetrafluoroethylene (PTFE) film tape commonly used in plumbing for sealing pipe threads. Tape commonly used in plumbing Thread seal tape is wrapped around the threads, lubricating the connection and allowing the two pieces to be screwed deeper together.
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