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Answer» What is National Pipe Thread mean? 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 types are named with a symbol and a full name. Examples of the symbols include NPT, NPS, NPTF, NPSC. MIP is an acronym for male iron pipe, and FIP is an acronym for female iron pipe. Outside North America, some US pipe threads are found, as well as many British Standard Pipe threads and ISO 7-1, 7-2, 228-1, and 228-2 threads. reference
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