Process Engineering Publications

Technical guides covering autoclave design, scale-up criteria, WFI systems design, and process safety barriers.

All TopicsAPI ManufacturingAutomationCost EngineeringFluid MechanicsHydrogenationProcess EngineeringProcess SafetyRajdeep Anand SirScale-UpSimulationSolvent RecoveryTechnology TransferUtilities
Methanol Boil-Up Rate in a 5 KL SS Batch Reactor – Case Study of 4,000 L Methanol Batch
Process Engineering
⏱11 min read

Methanol Boil-Up Rate in a 5 KL SS Batch Reactor – Case Study of 4,000 L Methanol Batch

A practical chemical engineering guide on calculating reactor jacket area, level-dependent boil-up rate reduction, and distillation times in a 5 KL SS batch reactor with 4,000 L methanol. Covers heat duties, apparent overall heat transfer coefficient (U), heating media, MOC comparisons, and metric units (kcal, hrs, kg/h).

Process EngineeringReactor DesignHeat TransferMethanolScale-UpSolvent RecoveryDistillation
Kiran Seepana 0 2
Material of Construction (MOC) Selection & Corrosion Coupon Testing in Chemical & Pharma Manufacturing: Reactors, Vessels, Centrifuges & Dryers
Process Engineering
⏱10 min read

Material of Construction (MOC) Selection & Corrosion Coupon Testing in Chemical & Pharma Manufacturing: Reactors, Vessels, Centrifuges & Dryers

A master engineering guide on Material of Construction (MOC) selection and in-situ corrosion coupon studies (ASTM G1, G4, G30, G48, G78) for chemical reactors, centrifuges, and dryers. Covers weight loss kinetics, PREN, SCC, ICH Q3D elemental leaching, and global standards.

MOC SelectionCorrosion Coupon StudyASTM G1ASTM G4ReactorsCentrifugesDryersHastelloySS316LICH Q3D
Kiran Seepana 0 0
Pharma Equipment Surface Area Calculation for Cleaning Validation, MACO & Solvent Quantity Requirements: Reactors, ANFDs, Multi-Mills & Synthesis Trains
Process Engineering
⏱9 min read

Pharma Equipment Surface Area Calculation for Cleaning Validation, MACO & Solvent Quantity Requirements: Reactors, ANFDs, Multi-Mills & Synthesis Trains

A definitive engineering and quality assurance guide to pharma equipment wetted surface area calculation (Reactors, ANFDs, Multi-Mills, Centrifuges, Piping), Maximum Allowable Carryover (MACO per APIC/FDA/EMA), swab sampling limits, and cleaning solvent quantity sizing.

Cleaning ValidationSurface Area CalculationMACOAPIC GuidelinesBatch ReactorANFDMulti-MillSolvent QuantitycGMP
Kiran Seepana 0 0
Pressure Drop: The Complete Practical Guide for Pharma Plant Engineers
Process Engineering
⏱6 min read

Pressure Drop: The Complete Practical Guide for Pharma Plant Engineers

Master piping pressure drop calculations. Understand Darcy-Weisbach friction factors, minor fitting losses, compressible flows, and budget hydraulic losses for API systems.

Process EngineeringHydraulicsPressure DropLine SizingFluid Dynamics
Kiran Seepana 0 0
Heat Exchanger Selection Guide for Pharmaceutical Processes: Double Tubesheet, Monolithic Stainless Steel & Graphite Blocks, Plates, Spiral & Microchannels
Process Engineering
⏱12 min read

Heat Exchanger Selection Guide for Pharmaceutical Processes: Double Tubesheet, Monolithic Stainless Steel & Graphite Blocks, Plates, Spiral & Microchannels

Comprehensive pharmaceutical engineering guide to heat exchanger selection. In-depth analysis of Sanitary Double Tubesheet (DTS), Monolithic Stainless Steel (SS316L) fusion-bonded blocks, Monolithic Graphite & Silicon Carbide (SiC) block exchangers, Gasketed & Welded Plates, Spiral, Corrugated Tube, and Scraped Surface exchangers with empirical sizing equations, pros/cons, and market-leading brands.

Heat ExchangerMonolithic SS Heat ExchangerDouble TubesheetMonolithic GraphiteSilicon Carbide SiCPlate Heat ExchangerSpiral Heat ExchangerProcess EngineeringThermal DesignWFI Condenser
Kiran Seepana 0 0
Electrical Design Basis, Connected Load Analysis, BOQ & Turnkey Capital Costing (INR) for Pharma & API Manufacturing Plants
Process Engineering
⏱10 min read

Electrical Design Basis, Connected Load Analysis, BOQ & Turnkey Capital Costing (INR) for Pharma & API Manufacturing Plants

A comprehensive engineering and capital budgeting guide for pharmaceutical and API electrical infrastructure: connected load list, substation & transformer sizing, Form 4b iMCC panels, flameproof ATEX installations, cable sizing mechanics, and itemized electrical BOQ in ₹ INR.

Electrical DesignPharma CAPEXBOQ CostingSubstation SizingCable SizingATEX FlameproofiMCC PanelsAPI Manufacturing
Kiran Seepana 0 0
How to Write a Process Design Basis That Actually Gets Used
Process Engineering
⏱6 min read

How to Write a Process Design Basis That Actually Gets Used

Discover how to draft a Process Design Basis for a 150°C batch reactor, detailing wall thickness sizing, MOC matrix, velocities, cooling load, and pump NPSH.

Process EngineeringDesign BasisReactor SizingProcess SafetyHeat Transfer
Kiran Seepana 0 0
Energy Pinch Analysis: Finding Hidden Savings in a Pharma Plant
Process Engineering
⏱7 min read

Energy Pinch Analysis: Finding Hidden Savings in a Pharma Plant

Optimize energy efficiency in active pharmaceutical ingredient manufacturing. Learn the basics of thermal Pinch Analysis, hot/cold composite curves, and heat exchanger network (HEN) retrofitting.

UtilitiesPinch AnalysisEnergy EfficiencyHeat ExchangersSustainability
Kiran Seepana 0 0
Civil & Structural Design Basis and Cost Estimation for Pharma & API Process Plants: A Rigorous Engineering Guide to Loads, Column Sizing, MTO, and Capital Budgeting
Process Engineering
⏱11 min read

Civil & Structural Design Basis and Cost Estimation for Pharma & API Process Plants: A Rigorous Engineering Guide to Loads, Column Sizing, MTO, and Capital Budgeting

A definitive chemical and civil engineering guide on structural design basis, load combinations (IS 875 / ACI 318), dynamic equipment unbalance, RCC column mechanical sizing, material take-off (MTO) metrics (rebar kg/m², concrete m³/m²), and capital cost estimation for multi-tier API and pharmaceutical process buildings.

Civil EngineeringStructural Design BasisCost EstimationAPI ManufacturingPharma Plant DesignColumn SizingMaterial Take-OffLoad CombinationsIS 456ACI 318Equipment LoadsProject Engineering
Kiran Seepana 0 0
How to Write a Process Design Basis That Actually Gets Used: A Practical Engineering Guide for Pharma, API, and Specialty Chemical Projects
Process Engineering
⏱11 min read

How to Write a Process Design Basis That Actually Gets Used: A Practical Engineering Guide for Pharma, API, and Specialty Chemical Projects

A comprehensive, calculation-oriented chemical engineering guide on authoring an authoritative Process Design Basis (PDB / Basis of Design BOD) for pharma and API capital projects, covering the 12 mandatory modules, HMB closure, equipment design margins, MOC matrix, utility tie-in conditions, and a 100 MTPA worked case study.

Process Design BasisFEEDDetailed EngineeringMass BalanceEquipment SizingAPI ManufacturingPharma EngineeringP&IDScale-UpProject ManagementTechnology Transfer
Kiran Seepana 0 0
Green Chemistry Metrics Every Process Engineer Should Know
Process Engineering
⏱8 min read

Green Chemistry Metrics Every Process Engineer Should Know

A detailed chemical engineering guide to Green Chemistry metrics (Atom Economy, E-Factor, PMI) featuring real-world industrial case studies (Ibuprofen, Sitagliptin, Sertraline) and solvent substitution guidelines.

Process EngineeringGreen ChemistrySustainabilityE-FactorProcess Mass Intensity
Kiran Seepana 0 0
NPSH Demystified: Why Cavitation Ruins Both Pumps and Batches
Process Engineering
⏱6 min read

NPSH Demystified: Why Cavitation Ruins Both Pumps and Batches

Learn the differences between NPSHR and NPSHA. Run step-by-step sizing calculations, evaluate vapor pressure temperature effects, and analyze a real pharma pump case study.

Process EngineeringPumpsNPSHCavitationFluid Dynamics
Kiran Seepana 0 0
Line Sizing: Velocity Limits Every Process Engineer Must Know
Process Engineering
⏱6 min read

Line Sizing: Velocity Limits Every Process Engineer Must Know

Understand standard velocity limits for process piping. Learn the economic velocity concept, suction guidelines, saturated steam limits, and slurry sizing.

Process EngineeringPiping SizingFluid DynamicsProcess UtilitiesPump Cavitation
Kiran Seepana 0 0
Steam Traps: The Cheapest Way to Lose 15% of Steam and Not Know It
Process Engineering
⏱6 min read

Steam Traps: The Cheapest Way to Lose 15% of Steam and Not Know It

Diagnose and eliminate steam trap failures in your utilities network. Learn about thermodynamic, float, and thermostatic steam trap sizing and ultrasound testing.

UtilitiesSteam SystemsEnergy EfficiencySteam TrapsMaintenance
Kiran Seepana 0 0
Systematic Flushing Before Startup: Protecting Your First Batch
Process Engineering
⏱6 min read

Systematic Flushing Before Startup: Protecting Your First Batch

Ensure piping cleanliness before pharmaceutical startup. Learn sequence flushing, velocity targets, line chemical cleaning, stainless steel passivation, and GMP documentation.

API ManufacturingFlushingPassivationCommissioningcGMP
Kiran Seepana 0 0
Control Valve Sizing: Why the Cv You Calculate Is Never the One Installed
Process Engineering
⏱8 min read

Control Valve Sizing: Why the Cv You Calculate Is Never the One Installed

Understand why control valves are frequently oversized in process plants, the mathematical sizing formulas (Cv), the dangers of cavitation and flashing, rangeability issues, and a real pharma reactor thermal control case study.

Process EngineeringControl ValvesValve SizingInstrumentationProcess Control
Kiran Seepana 0 0
Pharma P&ID Review Checklist: 50 Things Most Engineers Miss
Process Engineering
⏱5 min read

Pharma P&ID Review Checklist: 50 Things Most Engineers Miss

Run a systematic 50-point P&ID design review checklist derived from real HAZOP action items. Downladable PDF checklist included.

Process EngineeringP&ID ReviewHAZOPProcess SafetyDesign Checklist
Kiran Seepana 0 0
Commissioning Stage Gates: Where Projects Go Wrong and How to Prevent It
Process Engineering
⏱6 min read

Commissioning Stage Gates: Where Projects Go Wrong and How to Prevent It

Avoid late-stage project delays by mastering commissioning stage gates. Review pre-commissioning, commissioning checklists, punch lists, and Ready-for-Startup (RFSU) sign-offs.

Scale-UpCommissioningProject ManagementReady-For-StartupStart-Up
Kiran Seepana 0 0
Batch Reactor Agitator Design: Impeller Selection, Power, Mixing, Scale-Up, and Engineering Correlations
Process Engineering
⏱9 min read

Batch Reactor Agitator Design: Impeller Selection, Power, Mixing, Scale-Up, and Engineering Correlations

A definitive, calculation-oriented chemical engineering guide on batch reactor agitator design, covering hydrodynamics, impeller selection, power number, pumping capacity, Zwietering Njs solid suspension, heat transfer, shaft dynamics, and pilot-to-commercial scale-up.

Reactor DesignAgitationScale-UpImpeller SelectionFluid DynamicsMixingPower NumberZwietering NjsAPI ManufacturingChemical Engineering
Kiran Seepana 0 0

Disclaimer

The technical articles, chemical engineering equations, and recommendations published in these blogs are for informational and educational purposes only. They are based on general engineering practices and principles, which may not apply to specific design contexts or plant conditions. Users are responsible for verifying all design criteria and safety margins with certified professional engineers prior to implementation.