Principal Engineer – Mechanical Design Engineering
Summary
Leads the mechanical design, stress/FEA analysis, and full-lifecycle engineering of high-pressure tubular and plug flow reactors for chemical process industries, from concept design through commissioning and troubleshooting. Works with AutoCAD, SolidWorks, and ASME/API codes, and mentors engineers as a subject matter expert.
Job
Description: Principal Engineer – Mechanical Design Engineering
Reporting To
Head – Engineering
Job Grade:
Principal Engineer / Senior Technical Specialist / Subject Matter Expert
Position Summary
The Principal Engineer - Mechanical Design Engineering is responsible
for leading the mechanical design, development, analysis, and optimization of
Tubular Reactors (Plug Flow Reactors - PFR) used in chemical, petrochemical,
fertilizer, refining, and specialty process industries. The role provides
technical leadership across the complete equipment lifecycle, including concept
design, detailed engineering, manufacturing support, installation,
commissioning, troubleshooting, and continuous improvement.
Key Roles
& Responsibilities
Mechanical
Design & Engineering
- Lead the mechanical design and development of
Tubular Reactors and Plug Flow Reactor (PFR) systems.
- Prepare and review equipment specifications,
datasheets, engineering calculations, and fabrication drawings.
- Design high-pressures and high-temperature reactor
components in compliance with applicable design codes and standards.
- Perform mechanical calculations related to:
- Internal and external pressure
- Thermal expansion
- Stress analysis
- Fatigue analysis
- Creep assessment
- Structural integrity
- Optimize designs for safety, reliability,
manufacturability, and cost-effectiveness.
- Evaluate reactor performance under severe operating
conditions involving high pressures and temperatures.
- Analyze flow distribution, pressure drop, thermal
gradients, and heat transfer characteristics.
- Ensure reactor designs meet process requirements
and performance guarantees.
Mechanical
Integrity & Stress Analysis
- Conduct detailed stress analysis of reactor
components.
- Perform Finite Element Analysis (FEA) for critical
equipment.
- Evaluate thermal stresses caused by process and
startup/shutdown conditions.
- Assess fatigue life, creep behavior, and equipment
durability.
- Support Fitness-for-Service (FFS) and remaining
life assessments.
Materials
Engineering
- Select suitable materials for:
- High-temperature service
- Corrosive environments
- Hydrogen service
- High-pressure applications
- Review material specifications and metallurgy
requirements.
- Investigate material failures and recommend
corrective measures.
- Work closely with metallurgists on material
upgrades and qualification activities.
Process
& Multidisciplinary Coordination
- Collaborate with Process Engineering teams to:
- Understand process requirements
- Review operating conditions
- Evaluate reaction kinetics impacts
- Optimize reactor performance
- Coordinate with:
- Piping Engineering
- Structural Engineering
- Instrumentation & Controls
- Project Engineering
- Manufacturing Teams
Vendor &
Manufacturing Support
- Review vendor proposals and technical submissions.
- Participate in supplier qualification and technical
evaluations.
- Support procurement activities involving reactor
systems and critical components.
- Review fabrication procedures, welding
specifications, and inspection plans.
- Resolve manufacturing and fabrication-related
technical issues.
Quality,
Inspection & Compliance
- Ensure compliance with:
- ASME Section VIII
- ASME B31.3
- API Standards
- PED Requirements
- Company Engineering Standards
- Review inspection and testing requirements.
- Support Factory Acceptance Tests (FAT) and Site
Acceptance Tests (SAT).
- Ensure quality standards are maintained throughout
project execution.
Commissioning
& Plant Support
- Provide engineering support during:
- Installation
- Pre-commissioning
- Commissioning
- Startup
- Troubleshoot reactor operational issues including:
- Tube failures
- Hot spots
- Excessive pressure drop
- Mechanical distortions
- Thermal stress problems
- Conduct Root Cause Failure Analysis (RCFA).
Innovation
& Continuous Improvement
- Lead design improvement initiatives for enhanced
reactor performance and reliability.
- Evaluate emerging reactor technologies and advanced
materials.
- Support R&D activities for new process
applications.
- Develop engineering standards, design practices,
and lessons learned documentation.
Leadership
Responsibilities
- Act as Subject Matter Expert (SME) for Tubular
Reactor and PFR technologies.
- Mentor and guide mechanical design engineers.
- Review and approve critical engineering
deliverables.
- Lead technical reviews and client engineering
discussions.
- Support business development activities by
providing technical expertise during proposal and bid stages.
Requirements
Experience
- 6+ years of experience in Mechanical Design
Engineering.
- Minimum 6-7 years of specialized experience in:
- Tubular Reactors
- Plug Flow Reactors (PFR)
- High-pressure process equipment
- Chemical, Petrochemical,
Fertilizer, or Refining Industries
Technical
Skills
Engineering
Software
- AutoCAD
- SolidWorks
Design &
Analysis
- Pressure Vessel Design
- Thermal Analysis
- FEA & Stress Analysis
- Fatigue and Creep Assessment
- Mechanical Integrity Evaluation
- Weld Design & Fabrication Engineering
Standards
& Codes
- ASME Section VIII Div. 1 & 2
- ASME B31.3
- API Standards
- TEMA
- PED
- ISO Standards
Key
Competencies
- Tubular Reactor Design Expertise
- Mechanical Design Engineering
- Pressure Equipment Design
- Process Plant Engineering
- Advanced Stress Analysis
- Technical Leadership
- Root Cause Analysis
- Problem Solving & Innovation
- Project Management
- Cross-functional Collaboration