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2. Propane, butane, and LPG container valve connections

   en.wikipedia.org/wiki/Propane,_butane,_and_LPG...

   1 lb (16 oz) propane bottle (Coleman) 1"-20 CGA600 UNEF 25.4 mm 1.27 mm 1" 20 tpi EXT RH ABNT NBR 13794 ABNT NBR 8614 NPT: 19.1 mm 1.814 mm 3/4" 14 TPI ABNT NBR 8614 a ABNT NBR 8614 NPT: 9.5 mm 3/8" No thread ABNT NBR 8614 b ABNT NBR 8614 NPT: 19.1 mm 1.814 mm 3/4" 14 TPI Bayonet Autogas Bayonet No thread Bayonet camping: N/A No thread EXT N/A

3. Oxy-fuel welding and cutting - Wikipedia

   en.wikipedia.org/wiki/Oxy-fuel_welding_and_cutting

   In the UK and other countries, the oxygen hose is blue (black hoses may still be found on old equipment), and the acetylene (fuel) hose is red. [7] If liquefied petroleum gas (LPG) fuel, such as propane, is used, the fuel hose should be orange, indicating that it is compatible with LPG. LPG will damage an incompatible hose, including most ...

4. Orifice plate - Wikipedia

   en.wikipedia.org/wiki/Orifice_plate

   Orifice plate showing vena contracta. An orifice plate is a thin plate with a hole in it, which is usually placed in a pipe. When a fluid (whether liquid or gaseous) passes through the orifice, its pressure builds up slightly upstream of the orifice [1] but as the fluid is forced to converge to pass through the hole, the velocity increases and the fluid pressure decreases.

5. POL valve - Wikipedia

   en.wikipedia.org/wiki/POL_valve

   POL is the common name for the standard CGA 510 (US Compressed Gas Association connection number). The Thread specification is .885" – 14 NGO – LH – INT, meaning 0.885 in (22.5 mm) diameter thread, 14 threads per inch (1.814 mm pitch), National Gas Outlet form, left-hand internal thread. [3]

6. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   When the ends differ in size, it is known as a reducing (or reducer) elbow. Clarity on the difference between plumbing terminologies and geometric angles: In plumbing, the term "45-degree elbow" for example, refers to the angle of bend from the original straight pipe position (0 degrees) to the new position (45 degrees), not the actual angle ...

7. Thermal expansion valve - Wikipedia

   en.wikipedia.org/wiki/Thermal_expansion_valve

   A low refrigerant charge condition is often accompanied when the compressor is operational by a loud whooshing sound heard from the thermal expansion valve and the evaporator, which is caused by the lack of a liquid head right before the valve's moving orifice, resulting in the orifice trying to meter a vapor or a vapor/liquid mixture instead ...