Design Engineering

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Mechanical designers work with engineers using computer design software to create from sketches and even field work, technical drawings for equipment, foundations, and facilities.

A mechanical designer is a professional who specializes in creating detailed designs for mechanical systems and equipment.  They work in various industries, such as manufacturing, aerospace, automotive, and construction, to design and develop mechanical components, machines, and systems.

The role of a mechanical designer involves using computer aided design (CAD) software and other tools to create and revise technical drawings, schematics, and specifications for mechanical equipment and systems.  They work closely with engineers, project managers, and other professionals to ensure that designs meet project requirements and are feasible in terms of budget, safety, and functionality.  Mechanical designers may be responsible for creating designs for a wide range of mechanical systems, including heating, ventilation, and air conditioning (HVAC) systems, piping and plumbing systems, industrial machinery, and vehicle components.  They may also be involved in designing products such as consumer goods, medical devices, and electronics.

To become a mechanical designer, one typically needs a degree or certification in mechanical engineering, drafting, or a related field, as well as experience with CAD software and other design tools.  Strong technical and problem solving skills, as well as an understanding of manufacturing processes and materials, are also important for success in this field.


Science Branches

Applied Science
Mechanical Engineering

Design Engineering GlossaRy



  • Base Point  -  The point on a parametric sketch that remains fixed to the coordinate system.
  • Block Diagram  -  A schematic drawing that shows the relationahip in a systen using simple shapes.
  • Block Flow Diagram  -


  • Center Line  -  A linetype used to indicate the axis of symmetry of a hole or part.
  • Circumscribed (Outside)  -  A circle that touches every vertex.
  • Coordinate  -  Any point on a plane.
  • Coordinate Plane  -  A plane having a horizontal and vertical axis number line intersecting at the origin.


  • Datum Plane  -  A geometric reference point for parametric dimensions.
  • Design Aids  -
  • Dimension Line  -  A type of line used when applying dimension to a drawing.
  • Design Constraint  - A line on the range of options that is acceptable.
  • Drawing Abbreviations  -
  • Drawing Revision  -  Drawings are typically released and revised as the design process progresses.  Depending on the companies engineering and construction requirements depends on how the drawings are releases.
  • Dynamic Assembly  -  An assembly model in which parts are linked to their individual part files so the software can update the assembly when individual part files are modified.


  • Electrical One Line Diagram  -  A simplified drawing used to represent the power system in a plant.
  • Electrical Schedule  -  Tabulation of conduit, conductors and/ or cable quantities that are routed through various raceways for the purpose of connecting components of an electrical system.
  • Equipment Location Plan  -  A drawing created to show the location of equipment relative to other pieces of equipment.
  • Equipment Index  -
  • Exploded  -  An assembly in which parts are moved out of position along a axis so that each individual part is visible.
  • Export  -  To save data from one application in a file format that can be read by another software application.


  • Face  - A planar surface on an object bounded by edges when it intersects other surfaces.
  • Flange  -  A flattened collor or rim around a cylindrical part to allow for attachment.




  • Inscribed (Inside)  -  A sphere that touches the center of every faces.
  • Interface  -  The portion of a system or device used to interact with or control it.
  • Intersection  -  The point at which two points or surfaces meet, or the area shared bt overlapping surfaces.




  • Limit Tolerance  -  A tolerance that states the maximum and minimum allowable dimension, not the basic dimension value.
  • Line Designation  -  Flow lines should be labeled to show pipe size, line service identification, line number, line material, piping class and the line pressure rating.
  • Line List  -


  • Match Line  -  A match line is used to denote a cut line between two or more drawings where the area is to large for one drawing.
  • Machining Scale  -  A steel ruler with its smallest divisions 0.01 inch apart.



  • Offset  -  The distance from an existing object at which a new object will be created.
  • On Plot  -  Large and/or complex facilities require demarcation between hazardous and nonhazardous areas.
  • Over Dimensioning  -  Showing the same dimension more than one way in the drawing.


  • Part Drawings  -  Individual drawings prepared for each part that will be manufactured or modified for the project.
  • Parting Line  -  A line on a molded part where the two mold halves come togeather.
  • Paper Size  -  A plot size, drawing size or paper size is the size that the drawing is plotted on.
  • Piping One-line Drawing  -
  • Pipe Design Management System  -  Was developed by AVEVA formerly CAD Center in UK.  PDMS as it is known in the 3D CAD industry, is a customizable, multi-user and multi-discipline, engineer controlled design software package for engineering, design and construction projects in, but not limited to, offshore and onshore oil & gas industry, chemical & process plants, mining, pharmaceutical & food industry, power generation and paper industries.
  • Piping and Instrumentation Diagram  -  In the design process, a piping and instrumentation diagram, abbreviated as P&ID, is created following the Block Flow Diagram and Process Flow Diagram.
  • Piping and Instrumentation Diagram/How To  -  It is important that the Piping and Instrumentation Diagram contains all the information for the process because this is the basis for the Piping Design and HazOP.
  • Process Flow Diagram  -  Shows the relationships between the major components of a system or process plant. The PFD is more detailed than a Block Flow Diagram but does not contain as much detail as Piping and Instrumentation Diagram P&IDs.




  • Schematic Diagram  -  A schematic diagram or elementary diagram shows every wire and device involved in the control of an electrical load.
  • Service Classification  -  Service class is a one to three letter designation that shows what service the line is in.  It is typically shown on a Piping and Instrumentation Diagram as part of the line numbering system.
  • Solid Modeling  -  A type of 3D modeling that represents the volume of an object, not just its lines and surfaces.
  • Static Assembly  -  An assembly that does not update when individual part files change.
  • Storyboard  -  Pictures that dipict the sequence and composition of key events in an animation.
  • Subassembly  -  A group of parts that fit togeather to create one functional unit.
  • Surface Modeling  -  A three-dimensional modeling that defines only surfaces and edges.
  • System Variables  -  Settings that control the default operation of a CAD package.


  • Template  -  A drawing with certain settins that can be used repeatedly as the basis for starting a new drawing.


  • Update  -  To regenerate the model or drawing using any new dimension values or changed perameters.
  • User Coordinate System  -  A coordinate system defined by the user to assist in creating CAD geometry.


  • Vanishing Point  -  A location where the projections converge in a perspective drawing.
  • Vertex  -  A point where two or more curves, edges, or lines meet.


  • Wiring Diagram  -  The purpose of wiring diagrams are to provide the installer with the information required for terminating the individual conductors at various points.
  • Working Drawing  -  Drawings that convey all the information needed to manufacture and assemble a design.




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Architectural Decimal Text Size and Scale
Architectural Inch Text Size and Scale
Block Flow Diagram
Design Aids
Drawing Abbreviations

Tags: Mechanical Drawings Engineering