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What is the difference between NPT and BSP?

Do you ever find yourself confused when selecting between NPT and BSP? It’s a common problem, but it doesn’t need to be one. Understanding the differences between NPT and BSP threads will help you select the right type for your specific application.

NPT stands for “National Pipe Taper” and is an American standard for threads that taper in size, getting smaller at one end of the thread for a secure fit. This means that an NPT thread will have a slightly different pitch on the outside than on the inside. This system is also known as the “dry seal” thread because of its non-cutting characteristics. NPT is the most commonly used thread for plumbing applications in North America and is a popular choice for any type of pressurized pipe fittings.

BSP stands for “British Standard Pipe” and is a thread system designed for tighter seal. This thread is formed with a slight angle at the end of the thread which helps provide a higher level of seal than NPT. BSP threads are commonly found on fittings used in many European countries, so if your application requires working with pipes and fittings from either of these continents, consider using a BSP thread.

In conclusion, knowing the difference between NPT and BSP threads is important when selecting the right type for a specific application. NPT offers a dry seal option while BSP provides a better seal, so it’s important to consider your specific needs when making a choice. Both are widely used standards, so be sure to select the right one to ensure your connection is secure and leak-free.