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MEP201 Mechanical Engineering Drawing 1 st semester 2005-2006

MEP201 Mechanical Engineering Drawing 1 st semester 2005-2006. S R Kale Lecture. General Arrangement (G.A.) Drawings. Background. Schematic / P&I drawings are available, equipment sizing and selection has been done. NEXT: Need data on various equipment to integrate with one another.

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MEP201 Mechanical Engineering Drawing 1 st semester 2005-2006

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  1. MEP201Mechanical Engineering Drawing1st semester 2005-2006 S R Kale Lecture General Arrangement (G.A.) Drawings

  2. Background Schematic / P&I drawings are available, equipment sizing and selection has been done. NEXT: Need data on various equipment to integrate with one another. What data is needed? => G.A. drawing. G.A. & Layouts (2005)

  3. Overall features • About the manufacturer => Title block • Name plate rating • Model no., Date of manufacture • Ratings (capacity, design parameters) • Working substance • Electrical input/output • Terminal points – Scope of supply (items included or excluded) • Related drawings G.A. & Layouts (2005)

  4. Mechanical dimensions • Overall dimensions – Maximum, moving dimensions, space during operation, space for maintenance, clear space, • Movement – space, rails, • Mating – pipe flanges locators, size, type • Mechanical coupling – Shaft locators, diameter, keyway size, • Mountings – flange mounting PCD, thread/hole, locator pins, • Mounting locations – base plate, mounting brackets, locations and sizes, G.A. & Layouts (2005)

  5. Civil dimensions • Weights and forces – • Static loads • C.G. locations • Dynamic loads • Speed • Allowance for expansion, • Foundation – • Location of holes for mounting bolts • Size of foundation bolts G.A. & Layouts (2005)

  6. Handling requirements • Weights • C.G. • Lifting points – • Location of holes • Hook size • Special devices for lifting • DO NOT LIFT from …, G.A. & Layouts (2005)

  7. Electrical requirements • Power requirements – V, A, p.f., 1 or 3 phase • Earthing requirements • Load type – reactive, … G.A. & Layouts (2005)

  8. G.A. Drawing of Motor

  9. G.A. drawings - Examples Examples of pump, chilled water system, Loco, … G.A. & Layouts (2005)

  10. Slip-up (challenge!) • Flanges don’t match during erection • Foundation bolts are off • Piping and cabling become a jungle • Inadequate capacity (e.g. HOT crane at Badagrah) • Foundation dynamics are poor G.A. & Layouts (2005)

  11. Lecture summary Make or procure G.A. drawing from the manufacturer/supplier, ask for more information if not given => Integrate the information to make the plant. NEXT STEP : Make plant design, O.K. for construction. G.A. & Layouts (2005)

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