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2. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Various types of flanges are available, depending on construction. Flanges used in piping (orifice, threaded, slip-on, blind, weld neck, socket weld, lap-joint, and reducing) are available with a variety of facings, such as raised, flat, and ring-joint. Flange connections tend to be expensive because they require the precision forming of metal.

3. B16 Standardization of Valves, Flanges, Fittings, and Gaskets

   en.wikipedia.org/wiki/B16_Standardization_of...

   The ASME B16 Standardization of Valves Flanges, Fittings and Gaskets Committee, which operates under ASME’s Board on Pressure Technology Codes and Standards is responsible for standards covering valves, flanges, pipe fittings, gaskets and valve actuators for use in pressure services.

4. List of DIN standards - Wikipedia

   en.wikipedia.org/wiki/List_of_DIN_standards

   Steel threaded pipe fittings: Withdrawn: DIN EN 10241: EN 10241: DIN 2999-1: Pipe threads for tubes and fittings; parallel internal thread and taper external thread; tread dimensions: Withdrawn: DIN EN 10226-1: EN 10226-1: DIN 2999-2: Whitworth Pipe Threads for Tubes and Fittings; Cylindrical Internal Thread and Conical External Thread, Gauging ...

5. Coupling (piping) - Wikipedia

   en.wikipedia.org/wiki/Coupling_(piping)

   Pipe coupling (copper sweat) In piping and plumbing , a coupling (or coupler ) is a very short length of pipe or tube , with a socket at one or both ends that allows two pipes or tubes to be joined, welded ( steel ), brazed or soldered ( copper , brass etc.) together.

6. List of British Standards - Wikipedia

   en.wikipedia.org/wiki/List_of_British_Standards

   BS 499 Welding terms and symbols. BS 546 for Two-pole and earthing-pin plugs, socket-outlets and socket-outlet adaptors for AC (50–60 Hz) circuits up to 250V; BS 857 for safety glass for land transport; BS 970 Specification for wrought steels for mechanical and allied engineering purposes

7. Electrofusion welding - Wikipedia

   en.wikipedia.org/wiki/Electrofusion_Welding

   Electrofusion pipe fitting. Electrofusion welding employs fittings that are placed around the joint to be welded. Metal coils are implanted into the fittings, and electric current is run through the coils to generate heat and melt part of the pipes, forming a joint upon solidification.