Mechanical
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Mechanical
Detailed Summary of Work Done by the Mechanical Department in the Oil & Gas Industry
Overview The Mechanical Department is responsible for the design, specification, procurement support, installation, inspection, commissioning, maintenance, and integrity management of all static and rotating equipment used in oil and gas facilities. The department ensures equipment is safe, reliable, efficient, and compliant with international standards throughout the project lifecycle.1. Mechanical Design Engineering
- Mechanical design calculations
- Equipment selection
- Material selection
- Design verification
- Code compliance
- Equipment optimization
- Reliability improvement
- Cost optimization
2. Static Equipment Engineering
- Pressure vessels
- Heat exchangers
- Storage tanks
- Columns and towers
- Reactors
- Separators
- Knock-out drums
- Filters
- Scrubbers
- Pig launchers and receivers
- Air receivers
- Silencers
- Expansion tanks
- Mechanical design review
- Thickness calculations
- Nozzle reinforcement
- Material selection
- Vendor evaluation
- Inspection requirements
- Fabrication review
- Hydrotest requirements
3. Rotating Equipment Engineering
- Pumps
- Compressors
- Gas turbines
- Steam turbines
- Electric motors
- Diesel engines
- Fans
- Blowers
- Gearboxes
- Agitators
- Mixers
- Equipment selection
- Mechanical specifications
- Performance review
- Vendor drawing review
- Shaft alignment requirements
- Vibration analysis
- Mechanical seal selection
- Lubrication system design
4. Pressure Vessel Design
- Design pressure verification
- Design temperature verification
- Wall thickness calculations
- Nozzle reinforcement calculations
- Saddle support design
- Internal support review
- Corrosion allowance determination
- ASME Section VIII Division 1 & 2
- API 510
- PD 5500
5. Heat Exchanger Engineering
- Shell-and-tube heat exchangers
- Air-cooled heat exchangers
- Plate heat exchangers
- Double-pipe exchangers
- Mechanical design
- Tube bundle design
- Tube sheet calculations
- Expansion joint selection
- Material compatibility
- Vibration analysis
- Thermal expansion review
6. Storage Tank Engineering
- Crude oil tanks
- Diesel tanks
- Chemical tanks
- Water tanks
- LPG bullets
- LNG storage tanks
- Roof design
- Bottom plate design
- Shell design
- Wind load analysis
- Seismic analysis
- Foundation loading
- Settlement analysis
- API 650
- API 620
- API 653
7. Rotating Equipment Selection
- Flow rate
- Pressure
- Temperature
- Fluid properties
- Efficiency
- Reliability
- Maintenance requirements
- Life-cycle cost
8. Pump Engineering
- Centrifugal pumps
- Positive displacement pumps
- Screw pumps
- Gear pumps
- Multistage pumps
- Pump sizing review
- NPSH verification
- Mechanical seal selection
- Coupling selection
- Bearing selection
- Baseplate review
- Vendor evaluation
- API 610
- ISO 13709
9. Compressor Engineering
- Centrifugal compressors
- Reciprocating compressors
- Screw compressors
- Compressor selection
- Driver selection
- Anti-surge review
- Mechanical seal review
- Performance guarantee review
- Mechanical integrity review
- API 617
- API 618
- API 619
10. Mechanical Datasheets
- Design conditions
- Mechanical design
- Materials of construction
- Applicable codes
- Inspection requirements
- Painting requirements
- Preservation requirements
- Testing requirements
11. Material Selection
- Corrosion
- Temperature
- Pressure
- Sour service
- Erosion
- Fatigue
- Hydrogen service
- Carbon steel
- Stainless steel
- Duplex stainless steel
- Super duplex
- Inconel
- Monel
- Titanium
- Alloy steel
12. Corrosion Engineering Support
- Corrosion allowance
- Internal coatings
- External coatings
- Cladding
- Cathodic protection requirements
- Corrosion monitoring systems
13. Stress Analysis Support
- Nozzle load review
- Pipe support recommendations
- Thermal expansion assessment
- Equipment movement evaluation
14. Vendor Document Review
- General Arrangement (GA) drawings
- Fabrication drawings
- Foundation loads
- Weight reports
- Welding procedures
- Inspection plans
- Manufacturing schedules
- Performance curves
15. Procurement Support
- Preparing technical specifications
- Evaluating technical bids
- Clarifying vendor queries
- Reviewing deviations
- Conducting technical bid evaluations
- Participating in vendor meetings
16. Inspection and Quality Control
- Material verification
- Welding inspection
- Dimensional inspection
- Pressure testing
- Non-destructive testing (NDT)
- Painting inspection
- Final acceptance inspection
- Radiographic Testing (RT)
- Ultrasonic Testing (UT)
- Magnetic Particle Testing (MT)
- Dye Penetrant Testing (PT)
- Visual Testing (VT)
17. Factory Acceptance Test (FAT)
- Performance tests
- Hydrotests
- Mechanical run tests
- Vibration tests
- Noise tests
- Functional tests
18. Site Installation Support
- Installation supervision
- Equipment alignment
- Foundation inspection
- Grouting inspection
- Bolt tightening verification
- Lifting plan review
19. Commissioning Support
- Pre-commissioning checks
- Equipment flushing
- Oil flushing
- Mechanical run tests
- Leak testing
- Startup support
- Performance verification
20. Maintenance Engineering
- Preventive maintenance
- Predictive maintenance
- Corrective maintenance
- Breakdown maintenance
- Reliability-centered maintenance (RCM)
21. Reliability Engineering
- Root Cause Failure Analysis (RCFA)
- Failure Mode and Effects Analysis (FMEA)
- Reliability studies
- Mean Time Between Failures (MTBF) analysis
- Availability improvement
- Spare parts optimization
22. Asset Integrity Management
- Risk-Based Inspection (RBI)
- Fitness-for-Service (FFS) assessments
- Remaining life assessments
- Corrosion monitoring
- Thickness measurements
- Integrity assessments
- API 580
- API 581
- API 579
23. Mechanical Safety
- Pressure relief installation
- Rotating equipment guarding
- Lifting points
- Emergency shutdown compatibility
- Safe maintenance access
- Mechanical interlocks
24. Shutdown and Turnaround Support
- Plans equipment inspections
- Coordinates repairs
- Replaces worn components
- Conducts overhauls
- Performs pressure testing
- Supports plant restart
25. Brownfield and Revamp Projects
- Existing equipment condition
- Capacity upgrades
- Structural adequacy
- Replacement feasibility
- Life extension
- Retrofit requirements
26. Documentation and Deliverables
- Mechanical Design Basis
- Equipment Specifications
- Mechanical Datasheets
- Material Requisitions
- Technical Bid Evaluations
- Vendor Data Reviews
- General Arrangement Drawings
- Fabrication Drawings
- Inspection and Test Plans (ITPs)
- NDT Reports
- Hydrotest Reports
- Mechanical Completion Reports
- Commissioning Checklists
- Operation and Maintenance Manuals
- Spare Parts Lists
- Asset Registers
27. Standards and Codes Used
- ASME Boiler and Pressure Vessel Code (BPVC)
- API 610 – Centrifugal Pumps
- API 617 – Centrifugal Compressors
- API 618 – Reciprocating Compressors
- API 650 – Welded Storage Tanks
- API 620 – Low-Pressure Storage Tanks
- API 653 – Tank Inspection, Repair, and Reconstruction
- API 510 – Pressure Vessel Inspection
- API 579 – Fitness-for-Service
- API 580/581 – Risk-Based Inspection
- ISO 13709
- ISO 15156 (NACE MR0175)
- TEMA
- ASTM Material Standards
28. Coordination with Other Engineering Disciplines
- Process Engineering
- Piping Engineering
- Civil & Structural Engineering
- Instrumentation & Control
- Electrical Engineering
- Inspection & Quality
- Procurement
- Construction & Commissioning
- Operations & Maintenance
Typical Mechanical Engineering Workflow
- Receive process data and equipment requirements.
- Prepare mechanical design basis and equipment specifications.
- Select materials and applicable design codes.
- Develop mechanical datasheets and procurement documents.
- Review vendor offers and technical proposals.
- Approve vendor drawings and manufacturing documents.
- Support fabrication, inspection, and factory acceptance testing.
- Assist with site installation, alignment, and commissioning.
- Verify equipment performance during startup.
- Support operation, maintenance, integrity management, and future upgrades.