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Threaded and non-threaded pipe nipples have distinct characteristics and serve different purposes in plumbing systems.

Here are the differences between the two and their typical applications:

Threaded Pipe Nipples:

Design: Threaded pipe nipples have external threads on both ends, allowing them to be easily connected to other threaded fittings or pipes. The threads are typically tapered (NPT – National Pipe Thread) or straight (NPS – National Pipe Straight).
Connection: The threaded ends of these nipples provide a secure and leak-resistant connection when tightened into compatible threaded fittings or pipes. The threads create a tight seal, preventing water or gas leakage.
Versatility: Threaded pipe nipples are versatile and widely used in various plumbing applications. They can be easily installed, removed, or replaced, making them suitable for both permanent and temporary connections.
Common Applications: Threaded pipe nipples are commonly used in residential and commercial plumbing systems, including water supply lines, gas lines, heating systems, and irrigation systems.
Non-Threaded Pipe Nipples:

Design: Non-threaded pipe nipples, also known as plain or smooth pipe nipples, do not have external threads. Instead, they have a plain, smooth surface on both ends.
Connection: Non-threaded pipe nipples require additional fittings, such as couplings or compression fittings, to establish a connection with other pipes or fittings. pipe nipple manufacturer These fittings may include compression nuts, sleeves, or other types of connectors.
Specialty Applications: Non-threaded pipe nipples are often used in specific plumbing applications where a threaded connection is not required or desired. For example, they may be used with compression fittings in situations where a tight seal is required or in specialized systems like pneumatic or hydraulic systems.
Customization: Non-threaded pipe nipples can be cut and customized to specific lengths as needed. This flexibility allows for precise installation in unique plumbing configurations.
In summary, threaded pipe nipples provide a threaded connection for easy installation and are commonly used in various plumbing applications. Non-threaded pipe nipples, on the other hand, require additional fittings and are often used in specialty applications where a threaded connection is not necessary or when customization is required.

What are the common sizes of pipe nipples available in the market?

Pipe nipples are available in a range of sizes to accommodate different plumbing and piping needs. The common sizes of pipe nipples available in the market are based on the nominal pipe size (NPS) system. Here are some of the standard sizes:

1/8 inch (0.125 inches) NPS
1/4 inch (0.25 inches) NPS
3/8 inch (0.375 inches) NPS
1/2 inch (0.5 inches) NPS
3/4 inch (0.75 inches) NPS
1 inch (1.0 inches) NPS
1 1/4 inch (1.25 inches) NPS
1 1/2 inch (1.5 inches) NPS
2 inches (2.0 inches) NPS
2 1/2 inches (2.5 inches) NPS
3 inches (3.0 inches) NPS
4 inches (4.0 inches) NPS

These sizes represent the diameter of the pipe nipple and correspond to the inner diameter of the pipe or fitting to which they are connected. It’s important to note that these sizes are based on the NPS system and may vary slightly depending on the specific standards followed in different regions or industries.

Additionally, pipe nipples are available in different lengths to accommodate specific installation requirements. Common lengths range from a few inches to several feet. It’s worth noting that pipe nipples can also be custom cut to desired lengths to suit specific plumbing configurations.

It’s advisable to consult local plumbing codes, industry standards, or a professional plumber to determine the appropriate size and length of pipe nipples for your specific plumbing project.