A swage nipple concentric is a type of pipe fitting that is used to connect two pipes of the same diameter. It is made of a single piece of metal that is swaged, or expanded, to fit tightly around the pipes. The swage nipple is then inserted into the pipes and secured with a nut.

The technical specifications of a swage nipple concentric vary depending on the size and material of the fitting. However, some common specifications include:
1. Material: Carbon steel, Alloy steel, Stainless steel or Ductile
2. Size: 1/4 inch to 8 inches
3. Schedule: STD, XS, 160, XXS
4. Thread type: NPT, BSP, BSPT
5. Pressure rating: 100 psi to 20,000 psi

Swage nipples concentric are commonly used in a variety of applications, including:
A. Plumbing
B. HVAC
C. Fire sprinkler systems
D. Pressure vessels
E. Industrial piping

They are a versatile and reliable type of pipe fitting that can be used in a wide range of conditions.
Here are some additional features and benefits of swage nipple concentrics:
a. They are easy to install and remove.
b. They provide a secure and leak-free connection.
c. They are resistant to corrosion and rust.
d. They are available in a variety of sizes and materials to meet the needs of different applications.