A pipe fitting is one of the most important components of a fluid handling system, installed at a critical connection point, it must provide a seal to improve operational safety and efficiency. There are many different fittings available for tube fittings, each type suited to different needs. How do we make the right choice?
Here’s a look at the common options available to buyers and their respective advantages provided by YINUO,China’s leading pipe fitting factory.
Pipe fittings are used for straight line connections such as instruments, and the connection forms are socket welded or threaded. It is mainly used for small diameter low pressure pipelines, for the parts that need to be installed and disassembled frequently, or as the final adjustment of the pipe with threaded fittings.
There are a wide variety of nipple pipe fittings, and commonly used nipple pipe fittings can generally be divided into hard nipple pipe fittings and nipple pipe fittings. If it is divided according to the connection method of the nipple pipe fitting and the pipe, the hard pipe joint has three kinds of flaring type, sleeve type and welded type, and the hose nipple pipe fitting is mainly the buckle type hose nipple pipe fitting.
In the industrial piping system, threaded nipple pipe fittings are essential components used to extend pipe runs or connect different fittings. Choosing the correct size, material, and thread type is critical to ensuring a leak-proof and pressure-resistant connection.
As a leading manufacturer, Yinuo provides this comprehensive guide to help engineers and procurement managers select the right pipe nipples for their projects.
What is a Pipe Nipple?
A pipe nipple is a short piece of pipe with male threads (usually NPT or BSPT) at both ends, or sometimes at one end. They are typically used to connect two other female-threaded fittings or valves.
Common Types of Nipples:
- Close Nipple: The shortest possible length; threads meet in the center.
- Hex Nipple: Features a hexagonal middle section for easy tightening with a wrench.
- Barrel Nipple: A short length of pipe with threads on both ends and an unthreaded section in the middle.
- Swage Nipple: Used to connect pipes of different diameters (reducing nipple).
Main types of nipple pipe fitting
Threaded nipple pipe fittings
Threaded nipple pipe fittings are one of the most common options for securing the connection of two threaded pieces, one external, with threads protruding from the outside of the fitting; The other is an internal thread with a thread inside the fitting. A connection is formed when the external thread is screwed into the internal thread and secured by tightening the connection.
The threaded nipple pipe fitting contains a special kind: the pipe nipple threaded one end, which is also called the thread welded nipple pipe fitting. It connects two types of nipple pipe fitting with one end being a external thread and the other end being a welded steel pipe by welding. This pipe nipple threaded one end is usually used in cases where one pipe is directly connected to another pipe, which can improve the strength and tightness of the pipe.
Compression nipple pipe fittings
Compression fittings are another common option, using ferrule to create a leak-proof seal. When the nut of the joint is tightened, the ferrules are compressed between the nut and the receiving joint. Due to this compression, the ferrule effectively bites into the tube, resulting in a firm grip and tight seal. Compression fittings for compression fittings are also easy to assemble and remove.
Common size of nipple pipe fitting
The size unit of the pipe joint is expressed by ips, IPS is the standard size of the pipe thread, which is a kind of inch size. In this standard, IPS stands for Iron Pipe Size, and 1/8 ips stands for pipe diameter size of 1/8 inch.
The 1/4 ips threaded nipple pipe usually refers to the 1/4 inch threaded nipple pipe, which is often used in:
- audio equipment, such as guitar, electronic organ, stereo, etc., to connect the input and output of audio signals.
- The 1/4 ips threaded nipple pipe can also be used in video equipment, such as cameras, monitors, etc., to connect the input and output of video signals.
- 1/4 ips threaded nipple pipe can also be used in communication equipment, such as radios, walkie-talkies, etc., for connecting the signal transmission between the antenna and the device.
- 1/4 ips threaded nipple pipe can also be used in electronic equipment, such as televisions, computers, etc., for connecting the input and output of audio and video signals.
Thread Standards: NPT vs. BSPT
One of the most common causes of leaks is mismatched threads. It is vital to distinguish between these two international standards:
- NPT (National Pipe Taper): Common in North America. It has a $60^\circ$ thread angle and is designed for a mechanical seal.
- BSPT (British Standard Pipe Taper): Common in Europe and Asia (also known as R/Rc threads). It has a $55^\circ$ thread angle.
Warning: NPT and BSPT threads are not compatible due to the difference in thread pitch and angle. Mixing them will result in a compromised seal.
Materials and Pressure Ratings
The durability of your piping system depends on the material grade. Yinuo offers nipples in:
- Stainless Steel (304/316L): Superior corrosion resistance for chemical and food-grade applications.
- Carbon Steel (Black/Galvanized): High strength for oil, gas, and fire protection systems.
- Brass: Ideal for low-pressure water systems and aesthetic plumbing.
Why Choose Yinuo Threaded Nipples?
As a professional pipe fitting manufacturer, Yinuo ensures every nipple meets international standards (ASTM A733, DIN 2982).
- Precision Threading: Advanced CNC machining for perfect alignment.
- High-Pressure Resistance: Available in Schedule 80 and XXS for extreme environments.
- Global Shipping: Fast delivery to over 50 countries with ISO 9001 certification.
FAQ: Frequently Asked Questions
1. How is the length of a pipe nipple measured?
The length is measured as the overall length (OAL), including the threaded portions at both ends.
2. Can I get custom-length nipples?
Yes, Yinuo provides custom lengths from 50mm to 6000mm depending on your project requirements.