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2. Flare fitting - Wikipedia

   en.wikipedia.org/wiki/Flare_fitting

   The most common flare fitting standards in use today are the 45° SAE flare [2] [3],the 37° JIC flare, and the 37° AN flare. For high pressure, flare joints are made by doubling the tube wall material over itself before the bell end is formed. The double flare avoids stretching the cut end where a single flare may crack.

3. 3004 aluminium alloy - Wikipedia

   en.wikipedia.org/wiki/3004_aluminium_alloy

   Alternate designations include 3.0526 and A93004. 3004 aluminium and its various tempers are discussed in the following standards: [3] ASTM B 209: Standard Specification for Aluminium and Aluminium-Alloy Sheet and Plate; ASTM B 221: Standard Specification for Aluminium and Aluminium-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

4. Copper tubing - Wikipedia

   en.wikipedia.org/wiki/Copper_tubing

   For example, DN20 is the size for copper pipe with an outside diameter of 19.05 mm or 3 ⁄ 4 inch. While pipe sizes in Australia are inch-based, they are classified by outside rather than inside diameter (e.g., a nominal 3 ⁄ 4 inch copper pipe in Australia has measured diameters of 0.750 inches outside and 0.638 inches inside, whereas a ...

5. Aluminium alloy - Wikipedia

   en.wikipedia.org/wiki/Aluminium_alloy

   For instance, consider the bending of a thin-walled tube: the second moment of area is inversely related to the stress in the tube wall, i.e. stresses are lower for larger values. The second moment of area is proportional to the cube of the radius times the wall thickness, thus increasing the radius (and weight) by 26% will lead to a halving of ...

6. Tube bending - Wikipedia

   en.wikipedia.org/wiki/Tube_bending

   A tube can be bent in multiple directions and angles. Common simple bends consist of forming elbows, which are 90° bends, and U-bends, which are 180° bends. More complex geometries include multiple two-dimensional (2D) bends and three-dimensional (3D) bends. A 2D tube has the openings on the same plane; a 3D has openings on different planes.

7. Aluminium - Wikipedia

   en.wikipedia.org/wiki/Aluminium

   The density of aluminium is 2.70 g/cm 3, about 1/3 that of steel, much lower than other commonly encountered metals, making aluminium parts easily identifiable through their lightness. [28] Aluminium's low density compared to most other metals arises from the fact that its nuclei are much lighter, while difference in the unit cell size does not ...