1-11 1/2 NPT Thread Dimensions: A Comprehensive Guide
The 1-11 1/2 NPT (National Pipe Taper) thread is a standardized thread form used in piping and tubing systems. It is commonly used in industrial applications, such as oil and gas, petrochemical, and power generation. In this article, we will explore the dimensions of the 1-11 1/2 NPT thread and provide a comprehensive guide to its technical specifications.
Thread Dimensions
The 1-11 1/2 NPT thread has a major diameter of 1.5 inches (38.1 mm) and a pitch of 11 threads per inch (TPI). The thread angle is 60 degrees, and the thread form is tapered, with a taper of 3/4 inch per foot.
Thread Dimensions Chart
| Dimension | Value (inches) | Value (mm) |
|---|---|---|
| Major Diameter | 1.5 | 38.1 |
| Pitch | 11 TPI | 2.27 mm |
| Thread Angle | 60 degrees | 60 degrees |
| Taper | 3/4 inch per foot | 20.64 mm/m |
Thread Form
The 1-11 1/2 NPT thread form is a tapered thread, meaning that the diameter of the thread decreases as you move away from the origin of the thread. This taper is designed to provide a secure connection between the male and female threads.
Thread Form Illustration
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Taper: 3/4" per foot
Applications
The 1-11 1/2 NPT thread is commonly used in a variety of industrial applications, including:
- Oil and gas
- Petrochemical
- Power generation
- Chemical processing
- Industrial piping systems
Conclusion
In conclusion, the 1-11 1/2 NPT thread is a critical component in many industrial applications. Understanding the dimensions and technical specifications of this thread form is essential for ensuring the safe and reliable operation of piping and tubing systems. By following the guidelines outlined in this article, engineers and technicians can ensure that their systems are designed and installed correctly.
