ABB GROUP – Europe
ADCO – Abu Dhabi
ADMA OPCO – Abu Dhabi
ADNOC – Abu Dhabi
AEM – Italy
AGIP – Italy
AGIP (N.A.M.E.) LTD. – Lybia
AGL – Australia
AKER MARITIME – Norway
AMERADA HESS – U.K.
ANSALDO – Italy
ARAMCO – Saudi Arabia
ARCO – Canada
ARCO – U.S.A.
BECHTEL – UK
BEIJING GAS CORPORATION – China
BEIJING GAS TRANSMITION – China
BHP PETROLEUM – Australia
BONATTI – Italy
BOTAS – Turkey
BOUYGUES OFFSHORE- France
BP – AMOCO – U.K. /NL /U.S.A.
BRITISH GAS – U.K.
BROWN & ROOT – U.K.
BROWN & ROOT – U.S.A.
CAMUZZI GAZOMETRI – Italy
CHEVRON – U.S.A
CHINA PETROLEUM TECH. & DEV. CORP. – China
CHINESE NATIONAL PETROLEUM CO. – China
CHIYODA – Japan
CONOCO – Norway
CONOCO – U.K.
DEPA – Greece
DONG – Denmark
E.G.P.C. – Egypt
EIL – India
ENAGAS – Spain
ENEL – Italy
ENICHEM – Italy
EPIC ENERGY – Australia
ESSO – Malaysia
ESSO -EXXON – Europe
EXXON – U.S.A
FINCANTIERI – Italy
FORMOSA PLASTIC – Taiwan
FOSTER WHEELER – Europe
GAIL – India
GAS MALAYISIA – Malaysia
GASCO -Egypt
GAZ DE FRANCE – France
GAZPROM – Russia
HELLENIC PETROLEUM – Greece
HUDSON ENGINEERING – U.S.A.
HYUNDAY – Korea
INA NAFTAPLIN – Croatia
IOCL – India
ITALGAS – Italy
JAPAN STEEL WORKS – Japan
JCG -Japan
JUGOPETROL EXPORT – IMPORT – Jugoslavia
K.G.C. – Korea
K.N.P.C. – Kuwait
K.O.C. – Kuwait
KALA LTD. – U.K.
KELLOG – U.S.A.
KVAENER OIL & GAS – Europe
MACHINOIMPORT – Russia
MAERSK OIL – Denmark
MARATHON OIL LTD. – U.K.
MBTE PETRONAS – Malaysia
MOBIL OIL – U.K.
NAM – The Netherlands
NATIONAL IRANIAN GAS CO. – Iran
NATIONAL IRANIAN OIL CO. – Iran
NIGERIAN AGIP OIL CO. – Nigeria
NORSK HYDRO – Norway
OGP – Malaysia
ONGC – India
P.P.C. – Egypt
P.T.T. – Thailand
PDO – Oman
PEMEX – Mexico
PERTAMINA – Indonesia
PETROBEL BELAYIM – Egypt
PETROBRAS – Brasil
PETROCANADA – Canada
PETROJET – Egypt
PETRONAS – Malaysia
PHILLIPS PETROLEUM – Norway
PROSERNAT – France
Q.G.P.C. – Qatar
REPSOL – Spain
ROSETTI MARINO – Italy
SAGA PETROLEUM – Norway
SAIPEM – Italy
SAMSUNG – Korea
SCHLUMBERGER – Europe
SCOGAT – Tunisie
SHELL – Brunei
SHELL – Europe
SIRTEC – Italy
SNAM – Italy
SNAM PROGETTI – Italy
SONATRACH – Algerie
SONELGAZ – Algerie
STATOIL – Norway
TECHINT – Italy /Argentina
TECHNIP/MANNESMANN – Germany
TECNIMONT – Italy
TEXACO – Europe
TITAS GAS TRANSMITION & DISTRIB. – Bangladesh
TOTAL – Indonesia
TOTAL / FINA / ELF – France
TOTAL OIL & GAS – Venezuela
VICO – Indonesia
WHINTERSHALL – Germany
WOODSIDE PETROLEUM – Australia
WORLEY – Australia