Document Intelligence for
Gas Processing & LNG Terminals
P&ID extraction for gas sweetening, dehydration, NGL recovery, LNG liquefaction, storage, and regasification. Serving Petronet, IOCL, GAIL, ADNOC LNG, QatarEnergy, Petronas, and major LNG EPC contractors.
In short
Pathnovo delivers engineering document intelligence for gas processing plants and LNG terminals: P&ID extraction across gas sweetening, dehydration, NGL recovery, LNG liquefaction (APCI C3MR, Linde MFC, ConocoPhillips Optimized Cascade, Shell DMR), atmospheric refrigerated storage per API 620, and regasification. Cryogenic piping mill certificate traceability per ASME B31.3 Category M for 9 percent nickel steel, austenitic stainless, and aluminium. Active coverage for Petronet LNG (Dahej + Kochi), IOCL, GAIL, plus QatarEnergy Ras Laffan, Petronas Bintulu, ADNOC LNG. Multi-train brownfield digitisation 18 to 30 weeks for full terminal scope.
Procuring on LNG terminal greenfield or gas processing capacity addition? Pair MR package assembly with Technical Bid Evaluation (TBE) automation to evaluate vendor bids against MR specification in 24 hours, with licensor-preserved (APCI, Linde, ConocoPhillips, Shell DMR) deviation lists and ASME B31.3 + API 620 + NACE / IBR / PESO code-clause references.
Use Cases for Gas Processing & LNG
Greenfield LNG terminal commissioning documentation: storage tanks, regasification, marine berthing, send-out pipeline
Gas processing plant brownfield digitisation: legacy gas sweetening, dehydration, NGL recovery P&IDs
LNG storage tank inspection per API 653 + API 620 low-pressure low-temperature design
ASME B31.3 Category M (toxic service) cryogenic piping extraction for LNG cold-side scope
Marine berthing facility P&ID and emergency response plan documentation for LNG carriers
OISD 118 HAZOP register digitisation for gas processing and LNG scope
PESO Form XIV LNG storage licence and Form XV compressed gas licence preparation
CCOE licence dashboard for multi-site LNG terminal operations
NGL recovery + fractionation train P&ID extraction (ethane / propane / butane separation)
Send-out pipeline metering station and gas quality measurement system documentation
Mill certificate traceability for cryogenic piping (9% nickel steel, austenitic stainless, aluminium)
Day 1 handover from EPC contractor to LNG terminal operations in SAP PM / Maximo / AVEVA AIM
Named Gas Processing & LNG ICP Clients
Pathnovo serves gas processing and LNG operators across Indian PSU, Indian private, global LNG production operators, and the engineering and procurement contractor partner ecosystem. Four named client tiers below.
Indian PSU LNG and gas processing operators
Petronet LNG (Dahej + Kochi terminals), IOCL (Ennore LNG + Dhamra LNG project), HPCL (Chhara LNG project), GAIL (Hazira + Vijaipur + Pata gas processing + Dhamra LNG joint venture), ONGC (Hazira + Mumbai High gas processing), Reliance Industries (KG-D6 basin gas processing), Adani Total Gas (regasification terminals + city gas distribution), Indraprastha Gas (Delhi NCR city gas), Gujarat State Petronet, Mahanagar Gas, Gujarat Gas
Indian private gas processing operators
Reliance Industries KG-D6, Cairn Oil & Gas, Vedanta Cairn (Rajasthan + Cambay basin), Hindustan Oil Exploration (HOEC), Oil India Limited (Assam basin), Oilmax Energy, Selan Exploration, Asian Oilfield Services
Global LNG production operators
QatarEnergy (Ras Laffan LNG complex, 77+ MTPA expanding to 142 MTPA via North Field expansion), Petronas (Bintulu LNG, Pengerang downstream), ADNOC LNG (Das Island), Aramco (LNG export project scope under development), ExxonMobil (Papua New Guinea LNG, Mozambique LNG), Shell (Prelude FLNG, Nigeria LNG), TotalEnergies (multiple FLNG and onshore LNG), Cheniere Energy (Sabine Pass, Corpus Christi US LNG), Sempra (Cameron LNG, Costa Azul LNG)
Engineering and procurement contractor partners
Engineers India Limited (EIL, Indian PSU EPC with LNG terminal scope), Tata Projects, L&T Hydrocarbon Engineering, KBR, McDermott (named Pathnovo benchmark customer), Bechtel, JGC Corporation (largest LNG EPC contractor globally), Chiyoda Corporation (LNG terminal scope), Saipem, Technip Energies, Toyo Engineering Corporation, Worley
Gas Processing & LNG Regulatory Codes
Gas processing and LNG plants operate under multiple concurrent regulatory regimes spanning OISD layout and safety standards, API 620 low-pressure storage tank design, ASME B31.3 piping code with Category M cryogenic service provisions, IBR pressure equipment, PESO + CCOE licensing, fire protection, PNGRB pipeline regulation, and IMO IGC Code for LNG marine operations. The eight regulatory codes most directly applicable to gas processing and LNG scope below.
OISD 118
Layout and inter-distance for petroleum and hydrocarbon installations applies to LNG terminal storage tank inter-distance (typical 1.0-1.5 times tank diameter between adjacent LNG tanks), tank-to-marine-berth distance, tank-to-process-area distance, tank-to-site-boundary distance. Petroleum Rules 2002 Third Schedule and OISD 118 Chapter 3 inter-distance compliance mandatory. See the OISD 118 standard reference.
API 620 (low-pressure low-temperature storage tanks)
API 620 covers LNG storage tank design at low-pressure (less than 15 psig design pressure) and low-temperature (down to -270°F / -168°C for LNG service). Atmospheric refrigerated full-containment design typical: 9% nickel steel inner tank, mild steel outer tank, perlite + glass-wool insulation between inner and outer tank. Tank capacity typically 160,000-200,000 m3 per tank with 4-6 tanks per major LNG terminal.
ASME B31.3 Process Piping with Category M (cryogenic and toxic service)
Process piping per ASME B31.3 covers cryogenic LNG piping (down to -162°C) with Category M classification for high-criticality service. Low-temperature impact testing per ASME Section II Part D mandatory at LNG service temperatures. Common materials: 9% nickel steel for LNG piping, SA-312 TP304L / TP316L austenitic stainless, aluminium AA 5083. See the ASME B31.3 standard reference.
IBR 1950
Indian Boiler Regulations 1950 cover LNG terminal and gas processing plant pressure equipment: regasification heat exchanger (ORV / SCV / AAV), steam systems for LNG send-out boil-off compressor, gas processing plant amine reboiler, dehydration regeneration heater, NGL recovery refrigeration system. IBR Form II / III / IV registration mandatory. See the IBR compliance page.
PESO Form XIV + Form XV + CCOE licensing
PESO Form XIV (petroleum storage installation licence) covers LNG terminal as petroleum installation. PESO Form XV (compressed gas storage licence) covers LNG terminal compressed gas inventory plus gas processing plant compressed gas (hydrogen, nitrogen, oxygen) where present. Chief Controller of Explosives (CCOE) licence required under Petroleum Act 1934 + Gas Cylinders Rules 2016. See the CCOE standard reference, the PESO standard reference, and the CCOE Tank Farm standard.
OISD 116 / 117 (fire protection + tankage fire protection)
Fire protection and tankage fire protection standards apply to LNG storage tank scope. Fire-water capacity (typical 6,000-12,000 m3/hr at LNG terminal scale), foam fire-fighting systems specifically rated for LNG fire service, emergency shutdown valve (ESD) provisions, marine berthing emergency disconnect / ERD system.
PNGRB regulation
Petroleum and Natural Gas Regulatory Board (PNGRB) regulates gas pipeline operations and city gas distribution downstream of LNG terminals. Send-out pipeline from LNG terminal to gas distribution network falls under PNGRB pipeline regulation with tariff and access conditions. PNGRB inspection alongside OISD audit on operating LNG terminals.
IGC Code (International Maritime Organisation)
IGC Code (International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk) under IMO governs LNG carrier design and operation. LNG terminal marine berthing facility design must accommodate IGC-compliant LNG carriers with appropriate loading arm design, vapour return system, and emergency disconnect provisions.
Real Project Scope Examples
Six real gas processing and LNG project scope examples covering Petronet Dahej + Kochi LNG terminals, IOCL Ennore + Dhamra LNG joint venture, GAIL gas processing, plus QatarEnergy Ras Laffan and Petronas Bintulu global LNG complexes. Each example shows scope and typical engagement profile.
Petronet LNG Dahej terminal expansion (Gujarat)
Petronet LNG Dahej terminal (India's largest LNG import terminal, 17.5 MTPA across multiple trains) expansion scope covering additional regasification capacity, new LNG storage tank addition, send-out pipeline capacity expansion. APCI C3MR liquefaction process at exporting country origin; ORV regasification at Dahej. Pathnovo brownfield engagement: 16-22 weeks covering original 2004-era commissioning baseline plus 2009-2017 expansion plus 2024-2026 capacity addition. CFIHOS-compliant handover to Petronet AVEVA AIM platform.
Petronet LNG Kochi terminal scope (Kerala)
Petronet LNG Kochi terminal (5 MTPA single-train operation) brownfield baseline plus pipeline connectivity scope to inland gas distribution. Original 2013-era commissioning with subsequent pipeline tie-in expansion. Pathnovo engagement scope: 8-12 weeks across 6,000-8,000 drawings.
IOCL Ennore LNG + Dhamra LNG joint venture (Tamil Nadu and Odisha)
IOCL Ennore LNG terminal (5 MTPA, commissioned 2019) operating scope; Dhamra LNG joint venture (Adani + IOCL, 5 MTPA design) under development. Multi-site LNG terminal scope with multi-licensor convention preservation. Pathnovo engagement: 14-18 weeks for combined scope.
GAIL gas processing (Hazira + Vijaipur + Pata, Gujarat / Madhya Pradesh / Uttar Pradesh)
GAIL gas processing scope covering Hazira gas processing (NGL recovery + petrochemical integration), Vijaipur gas processing (ammonia-urea complex feedstock processing), Pata petrochemical (ethylene cracker + polymer downstream from gas processing scope). Multi-licensor scope including UOP, Axens, Linde. Pathnovo engagement: 14-20 weeks across 12,000-18,000 drawings spanning multi-decade baseline.
QatarEnergy Ras Laffan LNG complex (Qatar)
QatarEnergy Ras Laffan LNG complex (77+ MTPA across 14+ trains pre-expansion, expanding to 142 MTPA via North Field expansion). World's largest LNG production complex. Multi-train scope with APCI C3MR liquefaction technology. Pathnovo engagement scope: 20-30 weeks for full complex brownfield digitisation. Data residency in Azure UAE North.
Petronas Bintulu LNG complex (Sarawak, Malaysia)
Petronas Bintulu LNG complex (world's largest single LNG plant by historical capacity, 30+ MTPA across 9+ trains). Multi-train brownfield digitisation scope. Multi-licensor scope including APCI, Shell DMR, Linde MFC across different trains. Pathnovo engagement scope: 18-26 weeks.
LNG Liquefaction Licensor Coverage
Global LNG industry uses technology from multiple liquefaction process licensors plus dominant LNG EPC contractors. Pathnovo preserves licensor-specific tag conventions, equipment numbering schemes, and documentation styles during extraction. Six primary licensor and contractor groups covered below.
APCI (Air Products and Chemicals Inc)
Process units / scope
APCI C3MR (propane pre-cooled mixed refrigerant) liquefaction process - the dominant LNG liquefaction technology globally with ~70% market share. APCI AP-X / AP-N variants for high-capacity single-train scope (8+ MTPA single train at QatarEnergy Ras Laffan). Cited at Qatar, Petronet Dahej, Australia LNG projects.
Tag convention handling
APCI tag conventions and proprietary process licensing detail preserved during extraction.
Linde Engineering
Process units / scope
Linde MFC (Mixed Fluid Cascade) liquefaction process - common at mid-scale LNG plants. Linde proprietary cold box design with multi-stream plate-fin heat exchanger.
Tag convention handling
Linde tag conventions preserved with German engineering documentation style; multilingual document handling supported.
ConocoPhillips
Process units / scope
ConocoPhillips Optimized Cascade liquefaction process - cited at Bechtel-built Trinidad LNG, Australia Pacific LNG, Cheniere Sabine Pass + Corpus Christi US LNG export projects.
Tag convention handling
ConocoPhillips tag conventions preserved with US engineering documentation style. Cheniere + Bechtel partnership convention preservation supported.
Shell
Process units / scope
Shell DMR (Dual Mixed Refrigerant) liquefaction process - cited at Sakhalin LNG and Prelude FLNG floating LNG project. Shell C3MR variant for selected onshore scope.
Tag convention handling
Shell tag conventions and proprietary technology licensing detail preserved.
JGC Corporation + Chiyoda Corporation
Process units / scope
JGC + Chiyoda are the dominant LNG EPC contractors globally. JGC delivered Bintulu MLNG, Qalhat LNG, NLNG, and other tier-1 LNG complexes. Chiyoda delivered SEGAS Damietta and QatarEnergy Ras Laffan scope. Both preserve licensor process tags while applying contractor engineering documentation styles.
Tag convention handling
JGC and Chiyoda tag conventions preserved with Japanese engineering documentation style; multilingual document handling supported.
Bechtel + KBR + Saipem
Process units / scope
Bechtel is the dominant LNG EPC contractor on Trinidad LNG, Australia Pacific LNG, Cheniere Sabine Pass + Corpus Christi US LNG projects. KBR is a major EPC contractor across Aramco + ADNOC + Indian LNG scope. Saipem is a major contractor across European + African LNG scope.
Tag convention handling
Bechtel / KBR / Saipem tag conventions preserved with US / UK / Italian engineering documentation styles.
Why do gas processing and LNG plants need document intelligence?
Gas processing and LNG plants carry three concurrent documentation pressures. First, technology complexity: LNG production uses proprietary liquefaction processes (APCI C3MR, Linde MFC, ConocoPhillips Optimized Cascade, Shell DMR) with licensor-specific tag conventions, equipment numbering, and process documentation styles. Second, cryogenic safety: LNG operates at -162°C with severe material selection and inspection requirements; mill certificate traceability for 9% nickel steel and austenitic stainless is non-negotiable. Third, regulatory weight: Indian operators face concurrent OISD 118 (HAZOP and inter-distance), IBR 1950 (steam systems and pressure equipment), PESO (LNG storage compressed gas), and CCOE (petroleum installation licence) regulatory obligations. Document intelligence automates extraction across legacy gas processing baseline plus LNG production scope, enabling modern asset management, compliance register automation, and regulatory audit preparation.
How does Pathnovo support multi-train LNG terminal scope?
Multi-train LNG terminals (Petronet Dahej 17.5 MTPA across multiple trains, Ras Laffan 77+ MTPA across 14+ trains, Bintulu 30+ MTPA across 9+ trains) carry massive engineering documentation volumes across multiple commissioning eras. Each train carries identical process scope but separate engineering documentation, separate IBR Form IV registers, separate PESO licences, and separate CCOE licences. Pathnovo's multi-site dashboard consolidates across trains with cross-train comparison, train-level KPI tracking, and consolidated audit preparation. Multi-train brownfield digitisation engagement typically 18-30 weeks for full terminal scope.
Frequently Asked Questions
What gas processing and LNG documents can Pathnovo process?
Full gas processing and LNG industry document set: P&IDs for gas sweetening (aMDEA / Selexol / Sulfinol amine units), dehydration (TEG dehydration, molecular sieve dehydration), NGL recovery (cryogenic turboexpander, refrigerated absorption), LNG liquefaction (APCI C3MR, Linde MFC, ConocoPhillips Optimized Cascade, Shell DMR), LNG storage (atmospheric refrigerated full-containment), regasification (open rack vaporiser / ORV, submerged combustion vaporiser / SCV, ambient air vaporiser / AAV), send-out compression and metering. Equipment datasheets, HAZOP studies, piping isometrics, mill certificates (cryogenic material per ASME B31.3 + API 620 + 9% Ni / 304L / 316L), IBR Form IV registers for steam systems, PESO / CCOE licence documentation.
Do you support LNG terminal-specific documentation?
Yes. LNG terminal workflows include atmospheric refrigerated full-containment storage tank (typical 160,000-200,000 m3 per tank with 9% nickel steel inner tank, mild steel outer tank, perlite + glass-wool insulation), regasification (ORV / SCV / AAV per terminal location and tariff structure), marine berthing facility (gangway, loading arms, vapour return, emergency shutdown system / ESD), send-out compression to gas distribution network. Cryogenic piping per ASME B31.3 with low-temperature impact testing per ASME Section II Part D mandatory. CCOE Form XIV petroleum installation licence required. See the CCOE Tank Farm standard.
Which Indian gas processing and LNG operators does Pathnovo serve?
Petronet LNG (Dahej + Kochi terminals, India's largest LNG importer), IOCL (Ennore LNG terminal + Dhamra LNG project), HPCL (Chhara LNG project), GAIL (gas processing across Hazira, Vijaipur, Pata + Dhamra LNG joint venture), ONGC (Hazira gas processing + Mumbai High gas processing), Reliance Industries (KG-D6 basin gas processing + KG-D6 LNG handling), Adani Total Gas (regasification terminals), Indraprastha Gas (city gas distribution downstream of LNG terminals), Gujarat State Petronet (gas transmission infrastructure). PNGRB regulatory oversight applies.
How does Pathnovo support Aramco / ADNOC / QatarEnergy / Petronas LNG operations?
Active coverage for Aramco (LNG export project scope under development), ADNOC LNG (Das Island, multi-train operating capacity), QatarEnergy (Ras Laffan LNG complex, largest LNG production capacity globally; multi-train 77 MTPA pre-expansion plus North Field expansion to 142 MTPA), Petronas (Bintulu LNG, the world's largest single LNG plant by capacity, plus Pengerang downstream complex). CFIHOS handover specification typically applies at tier-1 operator scope. Data residency configurable in AWS Riyadh, Azure UAE North, or comparable regional deployment. See the CFIHOS standard reference.
What is the difference between gas processing and LNG plant engineering?
Gas processing covers upstream gas treatment: gas sweetening (H2S and CO2 removal via amine units), dehydration (water removal via TEG or molecular sieve), NGL recovery (ethane + propane + butane separation via cryogenic turboexpander or refrigerated absorption). LNG production starts after gas processing: liquefaction of treated natural gas at approximately -162°C, atmospheric refrigerated storage, regasification at receiving terminal, send-out to gas distribution network. Pathnovo handles both: gas processing brownfield baseline plus LNG production and regasification scope across single integrated engagement.
Does Pathnovo support cryogenic piping mill certificate traceability?
Yes. Cryogenic piping for LNG service uses 9% nickel steel (ASTM A333 grade 8 for piping, ASTM A553 for plate), austenitic stainless steel (SA-312 TP304L / TP316L), or aluminium (AA 5083). Low-temperature impact testing per ASME Section II Part D is mandatory at LNG service temperatures (down to -162°C). Pathnovo's MTR traceability workflow extracts mill certificates including impact testing data and validates against ASME Section II requirements. EPC PO line-item matching for cryogenic material delivery scope.
Which standards and codes does Pathnovo extract and validate against for gas processing and LNG?
Gas processing and LNG scope spans OISD 118 safety layout, ASME B31.3 Category M cryogenic piping, CCOE and CCOE Tank Farm licensing, PESO storage and compressed-gas licences, and CFIHOS handover data classes, plus API 620 low-temperature storage tank design. Extracted data is validated against these codes, including cryogenic material impact-testing requirements.
Are there free templates for gas processing and LNG document workflows?
Yes. Download the P&ID tag extraction template, the HAZOP register template, the piping MTO template, and the OISD 118 compliance audit checklist free. Each mirrors the structured extraction output Pathnovo delivers.
Related Standards
Free templates
Engineering and compliance templates for gas processing and LNG terminal scope. Free to download, email required.
P&ID Tag Extraction Template
For process and piping engineers.
Download freeHAZOP Register Template
For safety engineers and process leads.
Download freePiping MTO Template
For piping and procurement engineers.
Download freeMTO Reconciliation Template
For site engineers and construction managers.
Download freeOISD 118 Compliance Audit Checklist
For EPC compliance engineers on Indian hydrocarbons.
Download freePESO Approval Documents Checklist
For EPC compliance engineers on petroleum equipment.
Download freeSee what your documents actually contain.
Send us 10 documents from your current project. We extract, reconcile, and show you exactly what we find in 48 hours, before any contract.
If the accuracy isn't what we promised, you owe us nothing.