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  2. Testing and inspection of diving cylinders - Wikipedia

    en.wikipedia.org/wiki/Testing_and_inspection_of...

    A hydrostatic test involves pressurising the cylinder to its test pressure (usually 5/3 or 3/2 of the working pressure) and measuring its volume before and after the test. A permanent increase in volume above the tolerated level means the cylinder fails the test and must be permanently removed from service. [3]: sect. 5.7.3

  3. Hydrostatic test - Wikipedia

    en.wikipedia.org/wiki/Hydrostatic_test

    A hydrostatic test is a way in which pressure vessels such as pipelines, plumbing, gas cylinders, boilers and fuel tanks can be tested for strength and leaks. The test involves filling the vessel or pipe system with a liquid, usually water, which may be dyed to aid in visual leak detection , and pressurization of the vessel to the specified ...

  4. Diving cylinder - Wikipedia

    en.wikipedia.org/wiki/Diving_cylinder

    The pressure vessel is a seamless cylinder normally made of cold-extruded aluminum or forged steel. [5] Filament wound composite cylinders are used in fire fighting breathing apparatus and oxygen first aid equipment because of their low weight, but are rarely used for diving, due to their high positive buoyancy.

  5. Gas cylinder - Wikipedia

    en.wikipedia.org/wiki/Gas_cylinder

    A gas cylinder quad, also known as a gas cylinder bundle, is a group of high pressure cylinders mounted on a transport and storage frame. There are commonly 16 cylinders, each of about 50 litres capacity mounted upright in four rows of four, on a square base with a square plan frame with lifting points on top and may have fork-lift slots in the ...

  6. Proof test - Wikipedia

    en.wikipedia.org/wiki/Proof_test

    An example proofing round for the .50 BMG (12.7 × 99 mm) is the "cartridge, caliber .50, test, high pressure, M1". This uses the standard-weight .50 BMG M1 round propellant (240 gr of WC860), but a bullet weighing 999 gr (+/- 11 gr). The M1 proof round gives a proofing pressure of ~65,000 psi, 11,000 psi (~17%) above the standard service pressure.

  7. Pressure vessel - Wikipedia

    en.wikipedia.org/wiki/Pressure_vessel

    The screw thread used for high pressure vessel shell penetrations is subject to high loads and must not leak. High pressure cylinders are produced with conical (tapered) threads and parallel threads. Two sizes of tapered threads have dominated the full metal cylinders in industrial use from 0.2 to 50 litres (0.0071 to 1.7657 cu ft) in volume. [12]

  8. Cummins Testing Cylinder Skipping To Reduce NOx Emissions - AOL

    www.aol.com/news/cummins-testing-cylinder...

    Cummins Inc. (NYSE: CMI) is testing the same technology that boosts fuel economy in passenger vehicles to see whether it can dramatically reduce smog-forming oxides of nitrogen (NOx) emissions ...

  9. List of welding codes - Wikipedia

    en.wikipedia.org/wiki/List_of_welding_codes

    Specification and qualification of welding procedures for metallic materials - Welding procedure test, 13 parts. ISO 15615: Gas welding equipment. Acetylene manifold systems for welding, cutting and allied processes. Safety requirements in high-pressure devices ISO 15618-1: Qualification testing of welders for under-water welding.

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