LNG Process Engineering Consulting Services
A&A Consulting Services for LNG Process Concept Development, FEED, Detailed Engineering, and Process Safety — Gas Treatment, Liquefaction, Storage, and Regasification — Worldwide
Assign your company's LNG process engineering challenges to A&A, and let the high-level, seasoned LNG process consultants of the A&A Consulting Team put decades of hands-on LNG industry experience to work for you, around the world.
The pace of new LNG liquefaction capacity coming online is accelerating. U.S. LNG exports reached 17.4 billion cubic feet per day (Bcf/d) in the first half of 2026, up 23% year-over-year, as Plaquemines LNG reached full capacity, Corpus Christi Stage 3 brought six of its seven trains online, and Golden Pass LNG — the ninth U.S. LNG export terminal — shipped its first cargo in April 2026. Each of those trains represents a full process engineering scope, from gas pre-treatment through liquefaction, storage, and loading, and that scope repeats worldwide: global LNG trade hit a record 437 million tonnes in 2025, up 6.3% year-over-year, and Shell's 2026 LNG Outlook projects demand growing to nearly 700 million tonnes a year by 2050. Every train, whether onshore or floating, still has to pass through the same process engineering disciplines — concept selection, FEED, detailed engineering, and process safety — that determine whether a project performs as designed once it is built.
Avasthi & Associates, Inc. (A&A) is an independent LNG process engineering consulting firm. A&A does not sell process licenses, proprietary liquefaction technology, or equipment, and holds no equity in any project — our only business is expert technical consulting, which means A&A's LNG process engineering recommendations are never influenced by a stake in any particular licensor, vendor, or technology.
A&A's expertise on LNG process engineering projects spans the full LNG process value chain — gas processing/pre-treatment, liquefaction, storage & handling, and regasification — from process concept development through detailed engineering, commissioning, and start-up support. For offshore floating-system (hull, topsides, mooring) or onshore terminal-siting engineering, please see A&A's dedicated LNG Infrastructure and Floating LNG Consulting page. If your company needs process concept development, FEED or detailed-engineering support, process safety review, commissioning support, or LNG value-chain training, please contact us — the high-level, seasoned consultants and subject-matter experts (SMEs) of the A&A Consulting Team, and collaborators, are available to help your company, around the world.
1. Process Concept Development and Technology Screening
• Process Concept Development: developing the process concept for a new liquefaction, storage, or regasification facility, or a debottlenecking/expansion of an existing one
• Process Comparisons and Licensor/Technology Rankings: comparing and ranking competing process technologies and licensors against a project's feed-gas composition, capacity, and site constraints
• Value-Chain Coverage: evaluating projects across the full LNG value chain — gas processing/pre-treatment, liquefaction, storage & handling, and regasification
2. FEED and Detailed Engineering Support
• Front-End Engineering Development (FEED): supporting or independently reviewing FEED-stage process engineering
• Detailed Engineering: supporting or independently reviewing detailed-engineering-stage process work
• Process Deliverables Development and Review: developing or reviewing process design basis, process simulations, process flow diagrams (PFDs), process descriptions, heat & material balances (H&MBs), piping & instrumentation diagrams (P&IDs), process datasheets, and piping hydraulics
3. Process Safety and Regulatory Support
• Process Hazard Analysis (PHA): facilitating or reviewing process hazard analysis studies
• Hazard and Operability (HAZOP) Studies: facilitating or reviewing HAZOP studies for LNG process facilities
• Layer of Protection Analysis (LOPA): facilitating or reviewing LOPA studies to verify independent protection layers are adequate
• Regulatory Approval Support: supporting process-related aspects of regulatory approval submissions
4. Commissioning, Start-Up, and Performance Testing Support
• Pre-Commissioning and Start-Up Support: supporting pre-commissioning planning and start-up execution for LNG process facilities
• Commissioning Support: supporting commissioning activities through to normal operation
• Performance Test Run Support: supporting the performance test run that verifies a facility meets its guaranteed process performance
5. Training and Capability Development
• LNG 101: an introductory course on the LNG value chain for a client's professionals
• Dynamic Simulation Concepts: introducing dynamic (as opposed to steady-state) process simulation concepts and their application to LNG facilities
• Operator Training Simulators (OTS): introducing OTS concepts and specification to support operator readiness
• Customized Workshops: developing customized training workshops on other LNG value-chain topics of interest to a client
Related A&A Service: For A&A's full LNG infrastructure and floating LNG (FLNG, FSRU, FSU) consulting services — onshore terminal development and offshore floating-system concept, design, and installation — please see A&A's LNG Infrastructure and Floating LNG Consulting page.
Related A&A Service: This page is one of two services under A&A's LNG consulting practice — for A&A's full LNG service directory, please see A&A's LNG Consulting page.
Representative Project Experience
A&A's LNG process consultants have hands-on working experience on LNG projects including, but not limited to:
• SEGAS LNG (Egypt): dynamic simulation and Operator Training Simulator (OTS)
• Wheatstone LNG (Australia): Pre-FEED
• Sabine Pass LNG (USA): FEED, detailed engineering, commissioning and start-up
• Corpus Christi LNG (USA): Pre-FEED, FEED
• Rio Grande LNG (USA): licensor and contractor evaluation
Software and Technical Tools
The high-level, seasoned consultants of the A&A Consulting Team are expert users of the industry-standard software and technical tools used for state-of-the-art LNG process engineering studies, including:
• Aspen HYSYS / UniSim Design: for steady-state LNG process simulation, from gas treatment through liquefaction
• Aspen Plus / HTFS: for heat-exchanger and thermal design supporting liquefaction and regasification process work
• Dynamic Simulation Platforms: for dynamic process simulation and Operator Training Simulator (OTS) development
• PHA-Pro / PHAST: for process hazard analysis and consequence modeling
Deliverables
The high-level, seasoned consultants of the A&A Consulting Team deliver decision-grade technical intelligence for complex LNG process engineering projects, including, but not limited to:
• A process concept selection and technology/licensor ranking study
• A FEED- or detailed-engineering-stage process deliverables package or independent review
• PHA, HAZOP, and LOPA study reports
• Commissioning and start-up support documentation, and a performance-test-run plan
• A customized LNG value-chain training curriculum
To put the high-level, seasoned consultants and subject-matter experts (SMEs) of the A&A Consulting Team, and collaborators, to work on your company's LNG process engineering projects — including review and assessment of work already performed by your company in-house, or by other consulting or service companies — please contact us.
Frequently Asked Questions
How does this page relate to A&A's LNG Infrastructure and Floating LNG Consulting?
This page covers process engineering — process concept development, FEED, detailed engineering, process safety, and commissioning support — for gas treatment, liquefaction, storage, and regasification systems. A&A's LNG Infrastructure and Floating LNG Consulting page covers onshore terminal siting and offshore floating system (FLNG/FSRU/FSU) concept, design, and project development — the hull, topsides, mooring, and installation those process systems sit inside. Most projects need both, and A&A's consultants work across both disciplines.
Does A&A perform independent second-opinion reviews of process work already completed?
Yes. A&A's LNG process consultants regularly review and assess process engineering work already performed by a client's own in-house team, or by another consulting or service company — a common engagement for a client seeking an independent check before a major investment decision.
What stages of an LNG project can A&A support?
The full process engineering lifecycle — process concept development and technology/licensor screening, FEED, detailed engineering, process safety review (PHA/HAZOP/LOPA), and pre-commissioning through performance-test-run support — for gas processing/pre-treatment, liquefaction, storage & handling, and regasification facilities.
Does A&A provide LNG training for client staff?
Yes. A&A offers an introductory LNG 101 course on the LNG value chain, introduces dynamic simulation and Operator Training Simulator (OTS) concepts, and develops customized workshops on other LNG value-chain topics of interest to a client, as part of building in-house client capability.
Does A&A sell LNG process technology or hold a license to any process?
No. A&A is an independent LNG process engineering consulting firm. A&A does not sell process licenses, proprietary liquefaction technology, or equipment, and holds no equity in any project, so A&A's recommendations are never influenced by a stake in any particular licensor, vendor, or technology.
