NPT is the abbreviation of National Pipe Thread, 60 degrees sealed tapered Pipe Thread, the taper regulation is also 1:16, it is mainly used in U.S. and Canada. Usually, thread sealant is needed to achieve a leak-free seal but only 2 turns of thread sealant are required.

Learn to analyze NPT, PT, PF, G, and ZG threads, understand their advantages as well as applications, and how to better distinguish between them.

PT and NPT threads are both used a lot in hydraulic and pneumatic of thread pipe fittings. BSPT (British Standard Pipe Thread) can interchange with PT thread, but they aren’t quite the same. NPT threads are used a lot in North America, especially in water pipes, gas line and oil line.

Jul 31, 2024 · The G thread is a non-sealing, cylindrical thread that is suitable for general-purpose applications, while the NPT and PT threads are sealing threads that are designed for high-pressure applications.

NPT就是一般用途的美国标准锥管螺纹。 其中N表示National (American)美国国家标准，P表示PIPE管子，T表示TAPER锥形，牙型角为60°。 这种管螺纹在北美地区常用，或在使用 ANSI规范 中经常看到。 国家标准可查阅 GB/T12716-1991. 在做ANSI规范中须使用NPT牙哦！ 二、PT牙. PT牙为英制锥螺纹，牙型角为55°，密封中最常用。 多用在欧洲和英联邦国家，其实在台湾日本 JIS规范 也走英制规范，而中国其实也是使用英制螺牙。 属 惠氏螺纹 家族。 国家标准可查 …

PT and NPT threads are ideal for high-pressure, leak-proof connections, with NPT threads dominating in the North American market. G threads are more suited for lower-pressure systems where parallel threads and external seals are preferred.

Nov 2, 2024 · NPT is a 60° tapered thread conforming to ASME B1.20.1. suitable for piping and fluid transport systems with high sealing requirements. On the other hand, UNF is a straight thread conforming to ANSI/ASME B1.1 and is ideal for high precision mechanical fasteners.

Nov 10, 2023 · Navigating the labyrinth of pipes requires an understanding of NPT, PT, and G threads. Let’s explore the unique characteristics that make these threads indispensable globally.

NPT（美規 / 錐形螺紋）：美規螺紋，螺紋成錐形，牙型角 (螺山)為 60°，在美國被廣泛使用，ANSI 規範中幾乎都是此種螺牙規格。 PT（公制 / 錐形螺紋）：公制螺紋，螺紋成錐形，牙型角 (螺山)為 55°。

National Pipe Tapered Thread (NPT) is a US thread standard with a 60-degree thread form on a tapered thread, with a taper of ¾ inch per foot. Male national pipe thread (MNPT) is the male version of NPT pipe thread, sometimes abbreviated as MPT or NPT (M).