ABB LUMMUS HEAT
AIR PRODUCTS
ALASKAN COPPER WORKS
ARABIAN PETROCHEMICAL COMPANY
ARCADIAN FERTILIZER
ASHLAND OIL, INC.
BARIVEN CORPORATION
CHEVRON CHEMICAL CORPORATION
CANADIAN TUBULAR
CHEVRON USA
CONOCO PIPELINE
CONTINENTAL FABRICATORS
DELTAK CORPORATION
DIAMOND SHAMROCK
DOW CHEMICAL
DOW NORTH AMERICA
DUNN HEAT EXCHANGER
DURALOY TECHNOLOGIES
ELF OIL UK LIMITED
EXCHANGER REPAIR SERVICE
EXXON COMPANY USA
FARMLAND INDISTRIES
HEAT EXCHANGER DESIGN
HOLMAN BOIILER WORKS, INC.
HUNTSMAN CORPORATION
HYUNDAI PETROCHEMICAL COMPANY
JOHN BROWN E & C , INC.
JOSEPH OAT CORPORATION
KERR McGEE CHEMICAL
KUBOTA METALS CORPORATION
LAKEHEAD PIPELINE CO.
LYONDELL PETROCHEMICAL
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METALFORMS, INC.
MODULAR PRODUCTION EQUIPMENT
NOOTER CORPORATION
NORTH ATLANTIC REFINING
OHMSTEDE, INC.
OXY- PETROCHEMICALS, INC.
PETRO-CHEM DEVELOPMENT
PHILLIPS PETROLEUM COMPANY
QUANTUM CHEMICAL CORPORATION
REDMAN EQUIPMENT & MANUFACTURING
SAMSUNG
SAUDI PETROCHEMICAL COMPANY
SCHMIDT-CLEMENS
SELAS FLUID PROCESSING
SHELL CANADA
SHELL OIL COMPANY
SHELL PIPE LINE
SHELL INTERNATIONAL
SHELL WESTERN E & P
SHELL REFINING AUSTRALIA
SLAGLE MANUFACTURING
STONE & WEBSTER ENGINNERING
TAPCO INTERNATIONAL, INC.
TEXAS EASTMAN DIVISION
TEXACO SERVICES, INC.
TOYO, USA
VALERO REFINING COMPANY
VISTA CHEMICAL COMPANY
WISCONSIN CENTRIFUGAL
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