US & CANADA
Air Products and Chemicals
Albemarle Catalysts
American Refining Group
Aspen Technology
Athlon/Halliburton
Baker Hughes
Becht Engineering
Bechtel
Black & Veatch
Cameron/Schlumberger
Cenovus (Canada)
Chevron
CHS
Citgo Petroleum
Ecolab/Nalco Champion
Emerson Process Management
Ergon
ExxonMobil
Flint Hills Resources
Fluor
Haverly Systems
Honeywell UOP
Husky Oil (Canada)
Imperial Oil (Canada)
Infineum
Irving Oil (Canada)
KBR
LyondellBasell
Marathon Petroleum
Motiva Enterprises
Natural Resources Canada (Canada)
PAR Pacific
Phillips Petroleum
Placid Refining
PQ
Shell Canada (Canada)
Shell Oil
Suncor Energy (Canada)
Sinclair Oil
Syncrude Canada (Canada)
Valero Refining
Well Resources (Canada)
W.R. Grace
LATIN AMERICA/CARIBBEAN
Agencia Nacional do Petroleo (Brazil)
Ecopetrol (Colombia)
ENAP (Chile)
EG3 SA (Argentina)
Intevep SA (Venezuela)
IMP (Mexico)
ISAURA SA (Argentina)
Pemex (Mexico)
Petrobras (Brazil)
Petroleos de Venezuela SA (Venezuela)
Petroperu (Peru)
Petrotrin (Trinidad and Tobago)
Petrox SA (Chile)
PMI Comercio Internacional SA de CV(Mexico)
Refineria Dominicana (Dom. Rep.)
YPF S.A. (Argentina)
EUROPE
Alfa Laval Packinox (Sweden)
AVEVA (UK)
Axens S.A. (France)
BASF (Germany)
BP Int'l (UK)
CEPSA (Spain)
Chimec SpA (Italy)
Clariant (Switzerland)
Eni S.p.A. (Italy)
Equinor (Norway)
GREENALYSE (France)
Gunvor Raffinerie Ingolstad GmbH (Germany)
Haldor Topsoe (Denmark)
Hellenic Fuels and Lubricants AE (Greece)
Holborn Europa Raffinerie GmbH (Germany)
IFP Energies Nouvelles (France)
Intertek (UK)
IPLOM S.p.A. (Italy)
Johnson Matthey (UK)
KBC Process Tech. (UK)
Maire Tecnimont (Italy)
MiRO Mineraloelraffinerie Oberrhein (Germany)
MOL RT Hungarian Oil & Gas (Hungary)
Motor Oil (Hellas) Corinth Refineries, S.A. (Greece)
Neste Oil (Finland)
Nynas (Belgium)
OMMICA (UK)
OMV AG (Austria)
OPEC (Austria)
Preem AB(Sweden)
Refineria Gdanska SA (Poland)
Repsol SA (Spain)
RozsdaLovag Kft. (Hungary)
Saras S.p.A. (Italy)
Scranraff (Sweden)
Shell Catalysts & Technologies (The Netherlands)
Slovnaft, as (Slovakia)
SUEZ Water Technologies & Solutions (France)
TechnipFMC (UK) ThyssenKrupp Uhde GmbH (Germany)
Topnir Systems (France)
TOTAL S.A. (France)
Veba Oel AG (Germany)
Wintershall Dea AG (Germany)
Wood (UK)
MIDDLE EAST
Abu Dhabi Nat'l Oil (UAE)
Erpek Engineering & Consulting (Turkey)
King Fahd University of Pet. & Min. (Saudi Arabia)
Kuwait National Petroleum (Kuwait)
Modcon Systems Ltd (Israel)
Qatar National Oil Distribution Co (Qatar)
Saudi Aramco (Saudi Arabia)
Saudi Basic Industries Corp. (Saudi Arabia)
Tupras Genel Mudurlugu (Turkey)
AFRICA
Amreya Petroleum Refining (Egypt)
Engen Petroleum (S. Africa)
NASR Petroleum Co (Egypt)
Nigerian Nat'l Petroleum Corp (Nigeria)
Suez Oil Processing (Egypt)
ASIA- PACIFIC
Attock Refinery (Pakistan)
Ampol/Caltex Australia (Australia)
Bharat Petroleum (India)
Chiyoda (Japan)
Cosmo Oil (Japan)
CPC (Taiwan)
Engineers India (India)
Essar Oil (India)
Fuji Oil (Japan)
ITOCHU Int'l (Japan)
Hindustan Petroleum (India)
Hyundai Eng. & Const. (S. Korea)
Hyundai Oilbank (S. Korea)
Idemitsu Kosan (Japan)
Indian Oil Corp. (India)
JGC (Japan)
Pertamina (Indonesia)
PetroChina (China)
Petron (the Philippines)
Petronas (Malaysia)
PTT RTI (Thailand)
Refining NZ (New Zealand)
Reliance Industries (India)
Shell Australia (Australia)
Showa Shell Sekiyu (Japan)
Sinopec (China)
SK Corp. (S. Korea)
Toyo Engineering (Japan)
Thai Oil Public Co. (Thailand)
Worley (Australia)
