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  2. Maximum allowable operating pressure - Wikipedia

    en.wikipedia.org/wiki/Maximum_allowable...

    Depending on the design code that the pressurized item is designed, an over-pressure allowance can be used when sizing the relief valve. This is +10% for PD 5500, and ASME Section VIII div 1 & 2 (with an additional +10% allowance in ASME Section VIII for a fire relief case). ASME has different criteria for steam boilers.

  3. Pilot-operated relief valve - Wikipedia

    en.wikipedia.org/wiki/Pilot-operated_relief_valve

    Smaller package on the larger pipe sizes. More options for control. Seals more tightly as the system pressure approaches but does not reach set pressure. Control pilot can be mounted remotely. Some designs allow for changes in orifice size within the main valve. Can be used in engines. Higher Operating-to-Set Pressure ratio.

  4. Natural gas prices - Wikipedia

    en.wikipedia.org/wiki/Natural_gas_prices

    Price per million BTU of oil and natural gas in the US, 1998-2015. Natural gas prices, as with other commodity prices, are mainly driven by supply and demand fundamentals. However, natural gas prices may also be linked to the price of crude oil and petroleum products, especially in continental Europe.

  5. Relief valve - Wikipedia

    en.wikipedia.org/wiki/Relief_valve

    A relief valve DN25 on cooling water pipe from heat exchanger Schematic diagram of a conventional spring-loaded pressure relief valve. A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise build up and create a process upset, instrument or equipment failure, explosion, or fire.

  6. Safety valve - Wikipedia

    en.wikipedia.org/wiki/Safety_valve

    An oxygen safety relief valve DN250-safety valves. A safety valve is a valve that acts as a fail-safe.An example of safety valve is a pressure relief valve (PRV), which automatically releases a substance from a boiler, pressure vessel, or other system, when the pressure or temperature exceeds preset limits.

  7. Natural gas has never been this upside-down as negative ... - AOL

    www.aol.com/finance/natural-gas-never-upside...

    And in Europe, natural gas prices jumped to 2024 highs this past week after Ukrainian troops crossed into Russia and claimed the capture of a key gas transit hub.

  8. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    Threaded steel pipe is widely used in buildings to convey natural gas or propane fuel and is also a popular choice in fire sprinkler systems due to its resistance to mechanical damage and high heat (including the threaded joints). Threaded steel pipe may still be used in high-security or exposed locations because it is more resistant to ...

  9. Key suspect in EU corruption case can remove electronic bracelet

    www.aol.com/news/key-suspect-eu-corruption-case...

    The key suspect at the heart of the corruption scandal that rocked the European Union’s assembly last year no longer has to wear an electronic monitoring bracelet, the Belgian federal prosecutor ...