12 BSP Tapping vs. 12 NPT

Attribute	12 BSP Tapping	12 NPT
Thread Type	British Standard Pipe	National Pipe Taper
Thread Size	12 mm	12 inches
Thread Pitch	1.75 mm	0.8 threads per inch
Usage	Commonly used in Europe and Asia	Commonly used in North America

Introduction

When it comes to pipe fittings, two common types that are often compared are BSP (British Standard Pipe) Tapping and NPT (National Pipe Thread). Both types have their own unique attributes and applications, making it important to understand the differences between them. In this article, we will explore the key characteristics of BSP Tapping and NPT to help you make an informed decision when choosing the right type for your specific needs.

Thread Design

One of the main differences between BSP Tapping and NPT lies in their thread design. BSP Tapping features parallel threads, which means that the threads maintain a consistent diameter along the entire length of the fitting. This design allows for a tight seal without the need for excessive tightening. On the other hand, NPT fittings have tapered threads, which means that the diameter of the threads decreases towards the end of the fitting. This design requires the use of thread sealant to ensure a leak-free connection.

Thread Angle

Another important difference between BSP Tapping and NPT is the thread angle. BSP Tapping has a thread angle of 55 degrees, while NPT has a thread angle of 60 degrees. This slight variation in thread angle can impact the ease of installation and the overall performance of the fitting. Some users may find that the 55-degree thread angle of BSP Tapping provides a more secure and reliable connection, while others may prefer the 60-degree thread angle of NPT for its compatibility with a wider range of fittings.

Size Range

When it comes to size range, both BSP Tapping and NPT offer a wide selection of sizes to choose from. BSP Tapping is available in sizes ranging from 1/8 inch to 4 inches, while NPT is available in sizes ranging from 1/16 inch to 12 inches. This means that both types can accommodate a variety of applications, from small-scale projects to large industrial installations. It is important to consider the specific size requirements of your project when selecting between BSP Tapping and NPT.

Material Compatibility

Another factor to consider when comparing BSP Tapping and NPT is their compatibility with different materials. BSP Tapping is commonly used with materials such as brass, copper, and stainless steel, while NPT is often used with materials such as steel, iron, and aluminum. The choice of material can impact the overall performance and longevity of the fitting, so it is important to select a type that is compatible with the materials you will be working with.

Sealing Method

One of the key differences between BSP Tapping and NPT is the sealing method used to prevent leaks. BSP Tapping typically requires the use of an O-ring or gasket to create a tight seal, while NPT fittings rely on thread sealant to prevent leaks. The choice of sealing method can impact the ease of installation and maintenance of the fitting, so it is important to consider this factor when selecting between BSP Tapping and NPT.

Pressure Rating

Pressure rating is another important consideration when comparing BSP Tapping and NPT. BSP Tapping fittings are typically rated for lower pressures compared to NPT fittings. This means that NPT fittings are better suited for high-pressure applications where a tight seal is essential. It is important to consider the pressure requirements of your project when selecting between BSP Tapping and NPT to ensure that the fitting can withstand the necessary pressure levels.

Cost

Cost is always a factor to consider when choosing between different types of fittings. BSP Tapping fittings are generally more expensive than NPT fittings due to their precision engineering and high-quality materials. However, the higher cost of BSP Tapping fittings may be justified by their superior performance and longevity. On the other hand, NPT fittings are more affordable and readily available, making them a popular choice for budget-conscious projects.

Application

Ultimately, the choice between BSP Tapping and NPT will depend on the specific requirements of your project. BSP Tapping is well-suited for applications that require a tight seal and precise fit, such as hydraulic systems and pneumatic equipment. On the other hand, NPT fittings are commonly used in general plumbing applications and low-pressure systems. It is important to consider the specific needs of your project when selecting between BSP Tapping and NPT to ensure optimal performance and reliability.

Conclusion

In conclusion, BSP Tapping and NPT are two common types of pipe fittings that offer unique attributes and applications. By understanding the key differences between BSP Tapping and NPT, you can make an informed decision when selecting the right type for your project. Whether you prioritize thread design, size range, material compatibility, sealing method, pressure rating, cost, or application, it is important to consider all factors to ensure that the fitting meets your specific requirements. We hope that this article has provided valuable insights into the attributes of BSP Tapping and NPT to help you make the best choice for your next project.