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25-658: FPT may refer to: Female pipe tapered; see National pipe thread F/P/T, an acronym used by Canadian governments to designate a joint Special Advisory Committee of F ederal/ P rovincial/ T erritorial civil servants Fiat Powertrain Technologies , an Italian automotive company Fixed-parameter tractability , in computer science Florida Playwrights' Theatre , an erstwhile theatre group in Hollywood, Florida, United States Forced perfect termination , in electronics FPT Group ,

50-633: A lubricant like lubricating paste or thread seal tape. The use of tape also helps to limit corrosion on the threads, which otherwise can make future disassembly nearly impossible. Commonly used sizes are 1 ⁄ 8 , 1 ⁄ 4 , 3 ⁄ 8 , 1 ⁄ 2 , 3 ⁄ 4 , 1, 1 + 1 ⁄ 4 , 1 + 1 ⁄ 2 , 2, 2 + 1 ⁄ 2 , 3, 3 + 1 ⁄ 2 , 4, 5, and 6 inch, as pipe and fittings by most US suppliers. Sizes smaller than 1 ⁄ 8  inch are occasionally used for compressed air, while sizes larger than 6 inches are often joined by other methods. NPT

75-399: A workpiece after a modification process. It is usually an unwanted piece of material and is removed with a deburring tool in a process called deburring . Burrs are most commonly created by machining operations, such as grinding , drilling , milling , engraving or turning . It may be present in the form of a fine wire on the edge of a freshly sharpened tool or as a raised portion of

100-532: A Vietnamese IT company FPT Software , a Vietnamese software company FPT Industries , an American aerospace engineering company FPT University , in Vietnam Full Pressure Turbo , in Saab automobiles Portuguese Tennis Federation (Portuguese: Federação Portuguesa de Ténis ) Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with

125-437: A seal when torqued as the flanks of the threads compress against each other, as opposed to parallel/straight thread fittings or compression fittings in which the threads merely hold the pieces together and do not provide a seal. The various types of pipe threads are designed for use both with or without thread sealants, as particular applications demand. The sealants, where used, are typically thread seal tape thread sealant or

150-555: A surface; this type of burr is commonly formed when a hammer strikes a surface. Deburring accounts for a significant portion of manufacturing costs. In the printmaking technique of drypoint , burr, which gives a rich fuzzy quality to the engraved line, is highly desirable—the great problem with the drypoint medium is that the burr rapidly diminishes after as few as ten impressions are printed. There are three types of burrs that can be formed from machining operations: Poisson burr , rollover burr , and breakout burr . The rollover burr

175-408: A thread seal paste pipe dope (sometimes similar in composition to plumber's putty ). Because the thread body is tapered (0.75 in/ft or 62.5 mm/m), a larger diameter keeps compressing into a smaller diameter and finally forms a seal (no clearance remains between the crests and roots of the threads because of the taper). This means that NPT fittings should be burr -free and lubricated using

200-415: Is a deburring process that either mechanically grinds a burr off of metal or rolls the edge of the dangerous slit or sheared metal burrs into itself. Rolled mechanical deburring was first developed in the 1960s by Walter W. Gauer from Gauer Metal Product, Inc. as a means to speed up the process of hand deburring strips of metal that were used in bakery racks. One of the main benefits of waterjet deburring

225-515: Is a high level of precision and repeatability - and for this reason, CNC control is used. This eco-friendly process uses high-pressure water to remove loose burrs and chips even in deep holes – all while leaving the parts cleaner and free of debris. Pressurized water is precisely focused via CNC control to remove burrs and chips in and around parts. Depending on the cleanliness specifications, this can be performed submerged or in an open-air environment. Open-air washing/deburring targets specific areas of

250-637: Is an abbreviation for male iron pipe, and FIP is an abbreviation for female iron pipe. Outside North America, some US pipe thread sizes are widely used, as well as many British Standard Pipe threads and ISO 7–1, 7–2, 228–1, and 228-2 threads. The various types are each named with an abbreviation and a full name, as follows: Threaded pipes can provide an effective seal for pipes transporting liquids , gases , steam , and hydraulic fluid. These threads are now used in materials other than steel and brass, including PTFE , PVC , nylon , bronze , and cast iron . The taper on NPT threads allows them to form

275-493: Is defined by ANSI / ASME standard B1.20.1. The taper rate for all NPT threads is 1 inch of diameter in 16 inches of length ( 3 ⁄ 4 inch per foot or 62.5 millimeters per meter) measured by the change of diameter (of the pipe thread) over distance of thread. The half-angle (between the taper surface and the axis of the pipe) is arctan ( 1 ⁄ 32 ) ≈ 1.7899° ≈ 1° 47′. The standard for Nominal Pipe Size (often abbreviated NPS, which should not be confused with

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300-443: Is either done with tools like scrapers, files, sandpaper, stones and reamers or with handheld power tools that use abrasive points, sandpaper, or cutters similar to those used to deburr during machining. Electrochemical deburring is the use of electrochemical machining to deburr precision work pieces and edges that are hard-to-reach, such as intersecting holes. The process uses a salt or glycol solution and electricity to dissolve

325-459: Is the most common. Burrs may be classified by the physical manner of formation. Plastic deformation of material includes lateral flow (Poisson burr), bending (rollover burr), and tearing of material from the workpiece (tear burr). Solidification or redeposition of material results in a recast bead. Incomplete cutoff of material causes a cutoff projection. Burrs can be minimized or prevented by considering materials, function, shape, and processing in

350-455: The NPT has a crest width of 0.038 to 0.062 pitch, which is sharper than the 0.125 pitch of Sellers. National Pipe Taper Fuel ( NPTF , also called Dryseal American National Standard Taper Pipe Thread , defined by ASME B1.20.3) is designed to provide a more leak-free seal without the use of PTFE tape (often referred to by the popular brand name "Teflon") or another sealant compound. NPTF threads have

375-487: The abbreviation NPS for the straight thread form standard) is loosely related to the inside diameter of Schedule 40 series of sizes. Because of the pipe wall thickness of Schedule pipe, the actual diameter of the NPT threads is larger than the Nominal Pipe Size diameter, and considerably so for small sizes. Pipe of a given size in a different Schedule than Schedule 40 provides a different wall thickness while maintaining

400-436: The burr. The electric current is applied with a specialized tool to reach the burr location. Burrs are removed in 5 to 10 seconds, while the rest of the work piece is unaffected. Thermal energy method (TEM), also known as thermal deburring , is a deburring process used to remove hard-to-reach burrs or burrs from multiple surfaces at the same time. The process uses an explosive gas mixture to provide thermal energy to burn off

425-452: The burrs. It is the fastest burr removal process, requiring only 20 milliseconds to remove a burr. The process starts by loading the workpiece into an explosion-proof chamber, which is then sealed and clamped with approximately 220 metric tons (240 short tons). The chamber is then evacuated of air and filled with an oxygen and fuel mix; this mixture is pressurized to 0.5 to 1.9 MPa (73 to 276 psi). An electrical igniter then ignites

450-457: The design and manufacturing engineering phases of product development. Burrs in drilled holes cause fastener and material problems. Burrs cause more stress to be concentrated at the edges of holes, decreasing resistance to fracture and shortening fatigue life. They interfere with the seating of fasteners, causing damage to fastener or the assembly itself. Cracks caused by stress and strain can result in material failure. Burrs in holes also increase

475-432: The material below its embrittlement temperature , which causes the flash or burrs to be easily removed via tumbling or media blasting. This process has been around since the 1960s to deflash plastic and rubber. Common materials that are typically cryogenically deburred with blast media include PEEK, nylon, Teflon, Delrin, polypropylene, polycarbonate, acetal, PTFE, PET, HDPE, PVC, ABS and many others. Mechanical deburring

500-578: The mixture, which burns for approximately 20 milliseconds, causing all of the sharp corners and burrs to burn away. The peak temperature reaches 3,000 °C (5,430 °F). Cryogenic deburring is a cryogenic process used to remove burrs and flash from plastic and die cast workpieces. The process works by tumbling and/or abrasively blasting the workpieces at cryogenic temperature levels. The low temperatures (approximately −195 °C (−319.0 °F)) are achieved using liquid nitrogen , liquid carbon dioxide , or dry ice . This low temperature brings

525-459: The most common are mass-finishing , spindle finishing , media blasting , sanding , grinding , wire brushing , abrasive flow machining , electrochemical deburring, electropolishing , thermal energy method, machining , water jet deburring, and manual deburring. Manual deburring is the most common deburring process because it is the most flexible process. It also only requires low cost tools and allows for instant inspection. Manual deburring

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550-510: The risk of corrosion, which may be due to variations in the thickness of coatings on a rougher surface. Sharp corners tend to concentrate electrical charge, increasing the risk of static discharge. Burrs in moving parts increase unwanted friction and heat. Rough surfaces also result in problems with lubrication, as wear is increased at the interfaces of parts. This makes it necessary to replace them more frequently. Electrical charge buildup can cause corrosion. There are many deburring processes, but

575-489: The same basic shape but with crest and root heights adjusted for an interference fit, eliminating the spiral leakage path. In 1864, William Sellers , then president of Franklin Institute , presented a standard for nuts, bolts, and screws. Out of this effort came the first United States Standard threads , including pipe threads. Burr (edge) A burr is a raised edge or small piece of material that remains attached to

600-470: The same outside diameter and thread profile as Schedule 40. Thus the inside diameter of a given size of Schedule pipe differs from the Nominal Pipe Size, while outside diameters for a given nominal Schedule size are the same between Schedules. National Pipe Thread series have the same 60° included angle as Sellers thread . On the other hand, for sealing capability, tapered (pressure-tight) threads have crest and root shapes that differ from Sellers. For example,

625-500: The title FPT . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=FPT&oldid=1023995572 " Category : Disambiguation pages Hidden categories: Articles containing Portuguese-language text Short description is different from Wikidata All article disambiguation pages All disambiguation pages National pipe thread MIP

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