National pipe thread Wikipedia. Threaded pipe and elbow. The pipe has a male NPT thread, while the elbow is female. American National Standard Pipe Thread standards, often called national pipe thread standards for short, are U. S. national technical standards for screw threads used on threaded pipes and pipe fittings. They include both tapered and straight thread series for various purposes including rigidity, pressure tight sealing, or both. The various types are each named with a symbol and a full name examples of the symbols include NPT, NPS, NPTF, NPSC, and others. Npt Pipe Thread Chart Pdf' title='Npt Pipe Thread Chart Pdf' />Types. Two types of threads are distinguished Parallel straight threads, British Standard Pipe Parallel thread BSPP originally also known as British Standard. Outside the United States, some US pipe threads are found, as well as many British Standard Pipe threads and ISO 7 1, 7 2, 2. The various types are each named with a symbol and a full name, as follows 2Symbol2Shorthand expansion. Full name2Comment2NPTnational pipe taper. American National Standard Taper Pipe Thread. Tapered for sealing, often without any thread sealant for connections in nearly every type of service. NPSnational pipe straight. American National Standard Straight Pipe Thread. For rigidity sealable only with sealant sometimes male straight enclosed by female tapered for low pressure sealing. NPSCnational pipe straightcoupling. American National Standard Straight Pipe Thread for Couplings. For general couplings. NPSFnational pipe straightfuel. Dryseal USA American Standard Fuel Internal Straight Pipe Thread. H3 Parker Hannifin Corporation Tube Fittings Division Columbus, Ohio 4300 Catalog Industrial Pipe Fittings and Adapters H 2507 Straight Thread Elbow Page H47. Quick response dry pendenT elo sprinklers TecHnicAl dATA Form No. F040915 16. 04. 28 Rev. Page 1 of 9 The Viking corporation, 210 n industrial park drive. National Standard Taper Pipe NPT Threads Size Chart 116 0. Symmetrical Couplings Storz, Guillemin Chart Thread Measurements Cam Locking Couplings EN 144207 AMB, AVKI Special Types Cam Locking Couplings EN 14420. CHU 1. 15 www. anvilintl. Product Availability Quick Reference Chart NUT SUB Hammer Unions Standard Service Pipe Size in. End Fig No. Connection. Internal only, straight. NPSHnational pipe straighthose. Vsco Cam Effects. American National Standard Straight Pipe Thread for Hose Couplings. For hose couplings. NPSInational pipe straightintermediate. Dryseal USA American Standard Intermediate Internal Straight Pipe Thread. Similar to NPSF but slightly larger internal only, straight. NPSLnational pipe straightlocknut. American National Standard Straight Pipe Thread for Loose fitting Mechanical Joints with Locknuts. For use with locknuts. NPSMnational pipe straightmechanical. American National Standard Straight Pipe Thread for Free fitting Mechanical Joints. For various rigid mechanical uses. NPTFnational pipe taperfuel. Dryseal USA American Standard Taper Pipe Thread. For dryseal connections in nearly every type of service, especially fuel connections. NPTRnational pipe taperrailing. American National Standard Taper Pipe Thread for Railing Joints. For railings. PTF SAE SHORTpipe taper, fuel, SAE, short. Dryseal SAE Short Taper Pipe Thread. Adobe Flash Player 6.0 65. Named after SAE International similar to NPTF but one turn shorter. 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,3PVC, nylon, bronze, and cast iron. The taper on NPT threads allows them to form a seal when torqued as the flanks of the threads compress against each other, as opposed to parallelstraight thread fittings or compression fittings in which the threads merely hold the pieces together and do not provide the seal. The various types of pipe threads are designed for use both with or without thread sealants,1 as particular applications demand. The sealants, where used, are typically thread seal tape or pipe dope sometimes plumbers putty. As the thread body is tapered 0. This means that NPT fittings should be burr free and lubricated using 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  18,  14,  38,  12,  34, 1,  1 14,  1 12, and 2 inch, appearing on pipes and fittings by most U. S. suppliers. Sizes smaller than  18 inch are occasionally used for compressed air, while sizes larger than 2 inches are uncommon, due to the use of alternative methods of joining that are used with these larger sizes. SpecificationseditNPT is defined by ANSIASME standard B1. The taper rate for all NPT threads is 1 inch of diameter in 1. The angle between the taper and the center axis of the pipe is tan1 13. Nominal Pipe Size NPS is loosely related to the inside diameter of Schedule 4. Because of the pipe wall thickness, the actual diameter of the threads is larger than the NPS, considerably so for small NPS. Pipe of other schedules with a certain NPS has different wall thickness, but the same outside diameter and thread profile as Schedule 4. Ibm Lotus Notes Client 7.0 For Windows 2000 on this page. NPS. Thread formeditNPT and NPS threads have a 6. Sellers thread form flattened peaks and valleys. National pipe taper fuel NPTFeditNational Pipe Taper Fuel NPTF, also called Dryseal American National Standard Taper Pipe Thread, defined by ASME B1. PTFE tape often referred to by the popular brand name Teflon or other sealant compound. NPTF threads have the same basic shape but with crest and root heights adjusted for an interference fit, eliminating the spiral leakage path. Standard sizeseditAmerican Society of Mechanical Engineers National Pipe Thread Taper NPT5Pipe size. Threaddensity. Thread pitch. Hand tight Engagement 6Effective Thread 6Overall. Length 6Pipe nominaloutside diameter, ODTap drill. Length. Threads. Diameter. Length. Threads. Diameterinchinch1inchmminchthreadsinchinchthreadsinchinchinchmminchmm 11. Hand tight and effective thread engagement lengths. HistoryeditIn 1. William Sellers, the 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. See also Screw thread History of standardization. See alsoeditReferenceseditBibliographyeditOberg, Erik Jones, Franklin D. Horton, Holbrook L. Ryffel, Henry H. Green, Robert E. Mc. Cauley, Christopher J., eds., Machinerys Handbook 2. New York, NY, USA Industrial Press, ISBN 9. OCLC 4. 73. 69. 15. External linksedit.