Standard [WITHDRAWN] DIN Flow sheets and diagrams of process plants – Graphical symbols. German title: Fließbilder. A Picture symbols defined by DIN , The following picture symbols are standardised by DIN 28 , part 3. Only the parts of the norm relevant. DIN – DRAFT. Draft Document – Flow diagrams of process units – Definitions. standard by Deutsches Institut Fur Normung E.V.
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The various types of flow-sheet are discussed below. The list given below has therefore been divided into essential items and optional items. The blocks can be of any shape, but it is usually convenient to use a mixture of squares and circles, drawn with a template.
FLOW-SHEET PRESENTATION – I | Chemical Engineering Projects
Nominal operating pressure dinn required operating pressure. You are commenting using your WordPress. In another method each stream line is numbered and the data tabulated at the bottom of the sheet.
Notify me of new comments via email. As the process flow-sheet is the definitive document on the process, the presentation must be clear, comprehensive, accurate and complete.
In Europe, the German standards organisation has published a set of guide rules and symbols for flow-sheet presentation, Dn With complex processes, their use is limited to showing the overall process.
The stream physical properties are best estimated by the process engineer responsible for the flow-sheet. Physical property data, mean values for the stream, such as: The stream flow-rates and compositions can be shown on the diagram adjacent to the stream lines, 28040 only a small amount of information is to be shown, or tabulated separately.
Fill in your details below or click an icon to log in: Each block can represent a single piece of equipment or a complete stage in the process.
Email Address never made public. Block diagrams are useful for representing a process in a simplified form in reports and textbooks, but have only a limited use as engineering documents. Stream temperature, degrees Celsius preferred.
FLOW-SHEET PRESENTATION – I
On the detailed flow-sheets used for design and operation, the equipment is normally drawn in a stylised pictorial form. You are commenting using your Twitter account.
Notify me of new posts via email. For tender documents or company brochures, actual scale drawings of the equipment are sometimes used, but it is more usual to use a simplified representation.
A block diagram is the simplest form of presentation. It is best that each group use the same estimates, rather than each decide its own values.
A Picture symbols defined by DIN
If they are then shown on the flow-sheet, they are available for use by the specialist design groups responsible for the subsequent detailed design. The essential items must always be shown, the optional items add to the usefulness of the flow-sheet but are not always included. The data on the flow-rate of each individual component, on the total stream flow-rate, and the percentage composition, can be shown on the flow-sheet in various ways.
To find out more, including how to control cookies, see here: This is the method generally used by professional design offices. The simplest method, suitable for simple processes with few equipment pieces, is to tabulate the data in blocks alongside the process stream lines. Leave a Reply Cancel reply Enter your comment here You are commenting using your Facebook account.
Alterations and additions can be easily made. By continuing to use this website, you agree to their use. The amount of information shown on a flow-sheet will depend on the custom and practice of the particular design office.