Engineering Drawings: A Guide to Understanding Different Types

What are the different types of engineering drawings used according to BS 888?

1. Orthographic drawings

2. Isometric drawings

3. Assembly drawings

4. Sub-assembly drawings

5. General arrangement drawings

6. Circuit diagrams

7. Wiring diagrams

8. Block diagrams

9. Schematic diagrams

10. Fluid power diagrams

11. Instrumentation and control diagrams

Answer:

BS 888 outlines various types of engineering drawings, including orthographic and isometric drawings, assembly and sub-assembly drawings, general arrangement drawings, circuit and wiring diagrams, block and schematic diagrams, fluid power diagrams, and instrumentation and control diagrams.

BS 888 defines engineering drawings that serve different purposes. Orthographic drawings display a 2D representation of an object's multiple sides or views. Isometric drawings provide a 3D representation with depth, offering a realistic view. Assembly drawings depict how parts fit together, while sub-assembly drawings focus on smaller component groups. General arrangement drawings show overall project layouts and relationships between components.

Circuit diagrams showcase electrical connections and components in systems, while wiring diagrams present wiring details more specifically. Block diagrams provide an overview of a system's components and interactions, while schematic diagrams offer detailed representations of connections and functions within a system.

Fluid power diagrams illustrate hydraulic or pneumatic systems, showcasing the flow of fluids and components' interactions. Instrumentation and control diagrams represent control systems, showcasing instruments, sensors, and their connections for monitoring and regulating processes.

These drawings are interrelated as they complement each other in conveying comprehensive information. Orthographic and isometric drawings support visualization, while assembly, sub-assembly, and general arrangement drawings illustrate how components fit together. Circuit and wiring diagrams complement each other in detailing electrical connections, while block and schematic diagrams provide varying levels of detail. Fluid power and instrumentation diagrams serve different purposes in showcasing hydraulic/pneumatic systems and control mechanisms. Together, these drawings form a comprehensive documentation package crucial for engineering design, construction, and maintenance.