P&ID & Process Engineering
Piping & Instrument Diagrams (P&IDs), PFDs, MFDs, UFDs, MTFDs — Development and generation of all project/process flow diagrams for oil & gas, power, energy, refinery, petrochemical, process, and general industries.
A Consulting & Contract Engineering Company — State-of-the-art Engineering and Design
ELPI Engineering is a California based consulting engineering firm with capability of providing in-depth innovative quality consulting services that are based on the most current technologies available. ELPI Engineering is a registered consulting firm with the State of California. We provide state-of-the-art designs and engineering services in mechanical engineering: process, oil and gas, energy, petrochemical, chemical, pharmaceutical, general industries, and power engineering fields. Our guaranteed professional services include, but are not limited to:
Core Services
- —Generation & Developing of Project, P&IDs, PFDs, MFDs
- —UFDs, & MT FDs. Heat and Material Balance Calculations
- —Refinery Process Evaluation. Process & Technology Selection. Process Simulations
- —Energy Conservation and Efficient Utilization. Energy Supply & Demand Studies
- —Project Engineering / Project Management
- —Heat Transfer and Thermodynamics Analysis. Thermal Rating & Design of Heat Transfer / Process Equipment
Equipment & Systems
- —Industrial Heat Exchangers (including RODbaffle & Twisted-Tube types)
- —Process Fired Heaters, Biogas Boilers, Waste Heat Boilers, Boilers, Pressure Vessels, Storage Tanks
- —Vacuum Pump system design (liquid ring, dry screw, rotary vane) for process & industrial applications
- —Evaporators-Crystallizers, Oil/Gas Separators
- —Fossil Power Plants and Co-generation
- —Mechanical, Plumbing & HVAC Systems. Title 24 Energy Compliance
- —Advanced Energy Systems (including Molten Carbonate Fuel Cells)
- —Resolving Operational Problems
- —Technical Recruiting (Assignments of Engineers on Contract / Permanent Basis)
Petrochemical, Chemical & Pharmaceutical Engineering
Process design support for petrochemical complexes, specialty chemical plants, and cGMP pharmaceutical manufacturing — from PFDs, P&IDs, and process simulation to equipment design — for facilities throughout California and Alaska.
Petrochemical & Refinery
- —Refinery process evaluation & technology selection
- —Petrochemical complex process design support
- —Revamp, debottlenecking & capacity studies
- —Pressure vessels & storage tanks (ASME)
- —Oil/gas separators & utility flow diagrams (UFDs)
Chemical Processing
- —Specialty chemical plant process design
- —Evaporators-crystallizers — incl. sodium chloride crystal production PFDs
- —Vacuum pump systems (liquid ring, dry screw, rotary vane)
- —Heat & material balance calculations
- —Waste heat recovery & biogas boilers
Pharmaceutical (cGMP)
- —cGMP pharmaceutical manufacturing process design
- —API manufacturing engineering support
- —WFI (Water for Injection) systems
- —Clean steam systems
- —Vacuum system design for pharmaceutical processes
Thermal design for these industries — fired heaters, heat exchangers, boilers, and vacuum pumps — is detailed on our heat transfer engineering page.
P&ID Development Services
Development and generation of all project/process Piping & Instrument Diagrams (P&IDs) and Process Flow Diagrams (PFDs) for oil & gas, power, energy, refinery, petrochemical, process, and general industries — using latest ISA symbology.
P&ID Services
- —Detailed P&ID development using latest ISA symbology
- —Self and auxiliary P&IDs (utility distribution, relief systems)
- —Instrument specification and data sheet preparation
- —Control philosophy and cause-and-effect documentation
- —Interlock and safety system design
- —P&ID review coordination with engineering departments and clients
- —Walkdown, demolition, HAZOP, and as-built P&IDs
- —From facility layout stage to approval-for-construction stage
- —Planning P&IDs per safe design practices
- —High-quality deliverables containing all essential P&ID information
Flow Diagram Types
- —Process Flow Diagrams (PFDs) — design, evaluation, selection
- —Mechanical Flow Diagrams (MFDs)
- —Utility Flow Diagrams (UFDs)
- —Metallurgical Flow Diagrams (MTFDs)
- —Project Definition Schematics (PDS) temporary drawings
- —PFDs for SCR (Selective Catalytic Reduction) systems
- —PFD for Crystallizer/Evaporator — Sodium Chloride Crystal production
- —Comprehensive numbering systems for all drawings
- —Oil & gas, power, energy, refinery, petrochemical, and general industries
Oil & Gas Engineering Services
Upstream & Midstream
- —Separation system design (two-phase and three-phase)
- —Production facility engineering
- —Gas gathering and compression system design
- —Pipeline hydraulics and flow assurance
- —Oil/gas separator specifications
Downstream Refinery
- —Refinery unit design and revamp engineering
- —Atmospheric and vacuum distillation units
- —Hydroprocessing and catalytic reforming units
- —Refinery utility system design
- —Debottlenecking and capacity enhancement studies
Gas Processing
- —Natural gas processing plant design
- —LNG and NGL recovery systems
- —Gas dehydration and treating system engineering
- —Compression station design and optimization
- —SCR system PFD development
Process Engineering Projects
P&ID / Process Engineering in Orange County & Southern California
From our Seal Beach headquarters, ELPI Engineering provides P&ID and process engineering for clients throughout Huntington Beach, Irvine, Newport Beach, Costa Mesa, Long Beach, and greater Orange County and Los Angeles County — plus projects across California and Alaska, with P.E.-stamped drawings for plan check.
We also provide MEP Engineering, Structural Engineering and Heat Transfer Engineering — and the full list of cities and regions we serve.
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