Piping isometric drawing

Piping and supports design calculations Stress analysis report for piping Piping layout and isometric drawings Pipe rack drawings Miscellaneous piping accessories Hydrostatic test and other tests report Tie-in list... 

The first five methods are apphcable only after rigorous circuit analysis and when piping layouts and isometric drawings or scale models are available for quantity takeoff (e.g., pipe size, length, and specification, flanges and valve count, etc.). 

Piping design documentation (e.g., piping isometric drawings)... 

Since every detail of a plant design is recorded on electronic media and paper, many other kinds of flowsheets are also required for example, electrical flow, piping isometrics, and piping tie-ins to existing facilities, instrument lines, plans, and elevations, and individual equipment drawings in detail. Models and three-dimensional representations by computer software are standard practice in design offices. 

When the diagram is laid out, it is only necessary to show the relative elevation of the process connections to the equipment where they affect the process operation for example, the net positive suction head (NPSH) of pumps, barometric legs, siphons, and the operation of thermosyphon reboilers. Full details of pipe layout are usually shown in a different drawing, known as a piping isometric drawing. See Figure 5.19 for an example. 

Example 1 Isometric drawings of the piping can only be prepared with the piping drawings being available. 

Following the generation of the isometric drawings and bills of material, aU components required for the individual piping classes have to be compiled separately. The bills of material will be derived from this. Of course the generation of the bills of material is easier with the aid of CAD systems. The same apphes to the pipe lists (see Figure 4.35). The results can be stored on a data carrier and enclosed to the pipe inquiries. 

Routing and size correct to ELD/arrangcment drawing/piping isometric ... 

The final line size of single phase flow, two phase flow, gravity flow, and sluny flow should be ba.sed on hydraulic loop pressure proflle calculation using actual line length and pipe fittings shown in the piping isometric drawings. 

Tools to do this analysis axe P ID drawings, equipment data sheets, inslrumcnt/control valve data sheets, piping isometric drawings, hydraulic spireadshcets, process simulation computer software, and sound cngineeriiig judgment... 

Drawings such as piping isometrics, pipe hangers, pipe support locations, instrument schematics, demolition and standard details should usually not be included in the numbers just defined. This normally excludes all drawings requiring less than 80 man hours. The status of such drawings is too volatile and will distort the overall engineering status. 

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