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2. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Tees can connect pipes of different diameters, change the direction of a pipe run, or both. Available in various materials, sizes and finishes, they may also be used to transport two-fluid mixtures. [further explanation needed] Tees may be equal or unequal in size of their three connections, with equal tees the most common.

3. Nominal Pipe Size - Wikipedia

   en.wikipedia.org/wiki/Nominal_Pipe_Size

   Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

4. Electrofusion welding - Wikipedia

   en.wikipedia.org/wiki/Electrofusion_Welding

   There are two possible fittings used in electrofusion welding: couplers and tapping tees (saddles). Coupler fittings contain two separate regions of coils, creating two distinct fusion zones during welding. The inner diameter of the coupler is typically slightly larger than the outer diameter of the pipes.

5. Push-to-pull compression fittings - Wikipedia

   en.wikipedia.org/wiki/Push-to-pull_compression...

   The fittings were designed for use with polybutylene pipe, while stainless steel pipe inserts were used for internal support. Hepworth was acquired by Wavin in 2005. [ 1 ] Hep2O changed material and design in the 2000s to a smooth white plastic and a push-to-demount design.

6. National pipe thread - Wikipedia

   en.wikipedia.org/wiki/National_pipe_thread

   Because of the pipe wall thickness of Schedule pipe, the actual diameter of the NPT threads is larger than the Nominal Pipe Size diameter, and considerably so for small sizes. Pipe of a given size in a different Schedule than Schedule 40 provides a different wall thickness while maintaining the same outside diameter and thread profile as ...

7. Pipe fitting - Wikipedia

   en.wikipedia.org/wiki/Pipe_fitting

   Pipe fitting may refer to: The work of pipefitters , who install or repair piping or tubing systems Piping and plumbing fittings , adapters used in pipe systems