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  2. National Board of Boiler and Pressure Vessel Inspectors

    en.wikipedia.org/wiki/National_Board_of_Boiler...

    Accredited repair organizations qualify to stamp the National Board VR symbol on repair nameplates. [3] The National Board lab supports industry research and development by testing new designs, serving as a comparative standard for other laboratories, validating new concepts, and – upon jurisdiction request – assist in boiler and pressure ...

  3. ASME Boiler and Pressure Vessel Code - Wikipedia

    en.wikipedia.org/wiki/ASME_Boiler_and_Pressure...

    The first edition of the Boiler and Pressure Vessel Code, known as the 1914 edition, was a single 114-page volume. [6] [7] It developed over time into the ASME Boiler and Pressure Vessel code, which today has over 92,000 copies in use, in over 100 countries around the world. [5]

  4. Testing and inspection of diving cylinders - Wikipedia

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

    Ultrasonic inspection may be substituted for the pressure test, which is usually a hydrostatic test and may be either a proof test or a volumetric expansion test, depending on the cylinder design specification. Test pressure is specified in the stamp markings of the cylinder. The results of a correctly performed pressure test are final. [31] [32]

  5. PD 5500 - Wikipedia

    en.wikipedia.org/wiki/PD_5500

    PD 5500 is a specification for unfired pressure vessels. It specifies requirements for the design, manufacture, inspection and testing of unfired pressure vessels made from carbon, ferritic alloy, and austenitic steels. It also includes material supplements containing requirements for vessels made from aluminium, copper, nickel, titanium and ...

  6. Hydrostatic test - Wikipedia

    en.wikipedia.org/wiki/Hydrostatic_test

    The vessel is filled with a nearly incompressible liquid – usually water or oil – pressurised to test pressure, and examined for leaks or permanent changes in shape. Red or fluorescent dyes may be added to the water to make leaks easier to see. The test pressure is always considerably higher than the operating pressure to give a factor of ...

  7. Hydrogen leak testing - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_leak_testing

    Hydrogen leak testing is the normal way in which a hydrogen pressure vessel or installation is checked for leaks or flaws. This usually involves charging hydrogen as a tracer gas into the device undergoing testing, with any leaking gas detected by hydrogen sensors. [1] Various test mechanisms have been devised.

  8. Pressure vessel - Wikipedia

    en.wikipedia.org/wiki/Pressure_vessel

    The ASME definition of a pressure vessel is a container designed to hold gases or liquids at a pressure substantially different from the ambient pressure. [2]The Australian and New Zealand standard "AS/NZS 1200:2000 Pressure equipment" defines a pressure vessel as a vessel subject to internal or external pressure, including connected components and accessories up to the connection to external ...

  9. Autofrettage - Wikipedia

    en.wikipedia.org/wiki/Autofrettage

    Autofrettage is a work-hardening process in which a pressure vessel (thick walled) is subjected to enormous pressure, causing internal portions of the part to yield plastically, resulting in internal compressive residual stresses once the pressure is released. The goal of autofrettage is to increase the pressure-carrying capacity of the final ...

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