Jizhong NPT Pipe Nipple – Premium Threaded Pipe Connectors for Reliable Seals

An NPT pipe nipple is a short section of pipe with National Pipe Taper (NPT) threads on both ends, designed to connect two female-threaded pipes or fittings. In the U.S. and Australia, NPT nipples are widely used in residential plumbing, commercial piping, and industrial fluid systems. The tapered thread design creates a secure, leak-proof seal, making it the preferred connection method for high-pressure and high-temperature applications.

Pipe nipples are one of the most versatile pipe connectors. Unlike standard pipes, they are specifically made for joining components rather than transporting fluids over long distances. Each nipple has threads on both ends, allowing quick connection between pipes, valves, or other fittings.

Common Materials:

• Stainless steel (304/316) – corrosion resistance for water, food, and chemical systems
• Carbon steel (black or galvanized) – strength for industrial and oil & gas use
• Brass/Bronze – excellent for marine and potable water applications
• PVC/CPVC – lightweight and chemical-resistant options

The term “nipple” comes from its short, protruding appearance — a name that has remained standard in global plumbing terminology.

The National Pipe Taper thread (ANSI/ASME B1.20.1) is the most common standard in North America and Australia for creating pressure-tight joints. Its 1°47′ taper angle forms a wedging effect, improving the seal under pressure.

• Thread Angle: 60°
• Sealing Method: Thread interference plus sealant (PTFE tape or pipe dope)
• Typical Applications: Water supply, compressed air, oil & gas, fire protection, chemical transport

• 1/2″ NPT nipple – common for home plumbing in the U.S. and Australia
• 3/4″ NPT nipple – often used for garden irrigation and HVAC systems
• 1″ NPT nipple – general commercial and industrial piping
• 1 1/2″ NPT nipple – heavy-duty fluid transfer lines
• 2″ NPT nipple – large capacity pipelines

A close nipple is the shortest type, with no unthreaded section in the middle. Its compact size is perfect for installations with limited space, but it requires nipple wrenches for installation due to minimal grip area.

When ordering from Jizhong, always specify:

• Overall Length (OAL): End-to-end including threads
• Thread Engagement: Number of threads in contact (usually 3–5)
• Nominal Size: Based on inside diameter, e.g., 1/2″ NPT

Pro tip: For precise fitment, state whether you need “thread-to-thread” or “face-to-face” measurements.

1. Close Nipple – shortest possible length
2. Hex Nipple – hex section for wrench grip
3. Toe Nipple – longer thread on one end
4. Barrel Nipple – unthreaded center section
5. Reducer Nipple – connects different pipe sizes
6. Hose Nipple – for hose connections

A TOE (Threaded One End) nipple has threads on one end and a plain end for welding or slip-on fittings. Common in retrofit projects and hybrid piping systems.

• NPT: Common in the U.S. and Australia, 60° angle, requires sealant, handles high pressure
• BSPT: Common in Europe and Asia, 55° angle, not directly compatible with NPT without adapters

As a leading global malleable iron pipe fittings manufacturer, Jizhong provides:

• Full range: 1/8″ to 4″ NPT pipe nipples
• Multiple materials for every application
• Custom-cut lengths to fit project requirements
• Factory-direct pricing for bulk orders
• Fast shipping to the U.S., Australia, and worldwide

Whether you’re a plumbing contractor in Sydney or an industrial plant operator in Texas, Jizhong delivers durable, precise, and cost-effective NPT pipe nipple solutions you can trust.

Contact Jizhong today for technical assistance or a quick quote.

• What is the Difference Between BSPT and NPT Thread Fittings?
• Pipe Thread Standards