NPT (NATIONAL PIPE TAPERED)
NPT (National Pipe Tapered) is a thread standard used for pipe fittings in the United States. It features a tapered thread that provides a self-sealing connection, meaning the threads compress together to create a tight seal. However, thread sealant (such as PTFE tape or pipe dope) is often used to enhance sealing and prevent leaks.
Characteristics:
- Thread Type: Tapered
- Thread Angle: 60°
- Sealing Method: Self-sealing (metal-to-metal) but often reinforced with thread sealant (PTFE tape or pipe dope)
- Applications: Plumbing, hydraulic and pneumatic systems, gas and liquid pipelines, industrial piping
- Advantages:
- Strong and leak-proof connection
- Common standard in North America
- Resistant to high pressure
NPT threads are widely used in industries requiring high-pressure and leak-resistant connections, such as gas, oil, and water piping systems.
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