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2. Welding joint - Wikipedia

   en.wikipedia.org/wiki/Welding_joint

   Thin sheet metals are often flanged to produce edge-flange or corner-flange welds. These welds are typically made without the addition of filler metal because the flange melts and provides all the filler needed. Pipes and tubing can be made from rolling and welding together strips, sheets, or plates of material. [4]

3. Weld access hole - Wikipedia

   en.wikipedia.org/wiki/Weld_access_hole

   Without the weld access hole, the middle of the flange would be blocked by the web and inaccessible for welding. The hole also minimizes the induction of thermal stresses with a combination of partially releasing the welded section, avoiding welding the T section where the flange joins the web and improving cooling conditions. [1] [2]

4. Fillet weld - Wikipedia

   en.wikipedia.org/wiki/Fillet_weld

   The weld is triangular in shape and may have a concave, flat or convex surface depending on the welder's technique. Welders use fillet welds when connecting flanges to pipes and welding cross sections of infrastructure, and when bolts are not strong enough and will wear off easily. [1]

5. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Although flange fittings are bulky, they perform well in demanding applications such as large water supply networks and hydroelectric systems. Flanges are rated at 150, 300, 400, 600, 900, 1500, and 2500 psi; or 10, 15, 25, 40, 64, 100, and 150 bars of pressure. Various types of flanges are available, depending on construction.

6. Butt welding - Wikipedia

   en.wikipedia.org/wiki/Butt_welding

   Butt welding is a commonly used technique in welding that can either be automated or done by hand on steel pieces. [1] Butt welding can also be done with brazing for copper pieces. It is used to attach two pieces of metal together such as pipe, framework in factories, and also flanges. [ 1 ]

7. Metal expansion joint - Wikipedia

   en.wikipedia.org/wiki/Metal_expansion_joint

   Standard connectors of the axial expansion joint are welded ends, fixed flanges and loose flanges. Axial expansion joints are often equipped with a guiding tube on the inside of the metal bellows. This reduces the flow resistance and prevents damage caused by direct contact with the flowing medium.