『Original by HaiChuan Translation Team』Effective flow area of the pressure relief valve

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English title: Actual Orifice Areas For Different Relief Valve Manufacturers Based On Api 526 Orifice Designations
Original link: Click here
Original author: ankur2061
Translator ID: @rain814218551
Those who wish to subscribe to the articles from the “Haichuan Translation Group” are invited to leave a message below the post saying “I want to subscribe”, or send me a message; I will notify everyone as soon as new articles are available. Effective orifice areas of relief valves from various manufacturers based on API 526 orifice designations: API 526 provides standards for orifice designations corresponding to the cross-sectional areas of relief valve orifices, such as D, E, F. . Wait. However, most pressure relief valve manufacturers provide a channel code that has the same designation as API 526 but a different channel area (higher than API 526), by using a reduced outflow coefficient for the channel. They call it the “effective flow area” or “effective discharge area”; when used with their own discharge coefficient, it is equal to the flow area specified in the API 526 standard. In fact, if you are calculating the flow rate for a pressure relief valve, especially for the design of the inlet and outlet pipes with the goal of reducing the inlet pressure energy by 3% and the outlet pipe pressure energy by 10% (for conventional pressure relief valves), then you can use the \"effective flow area\" specified in the formulas in Part 1 of API520 to calculate the flow rate through the flow channels provided by the specific manufacturer. Today’s article provides well-known pressure relief valve manufacturers around the world with an Excel sheet showing that their \"effective flow area\" is higher than the area corresponding to the flow area code specified in the API 526 standard. If someone chooses a specific model from a particular manufacturer, such as “Farris Company” or “Leser Company”, this table should be useful. Not all manufacturers or models are included, but some well-known manufacturers and their standard models are covered; they can use this table to determine the actual flow rate calculated from the formulas in Part 1 of API 520. It should be noted that this Excel workbook does not include the flow area specified in the ASME Section VIII standard; it only covers the API 526 standard.