The completion by INTEC in 1987 of a joint industry study on Insulated Marine Pipelines and Risers, led to a better understanding of the technology and economics of transporting viscous, waxy or high pour point fluids through marine pipelines. It also resulted in the award to INTEC of the design engineering for the Dulang pipeline system offshore Malaysia, which moves waxy crude to a floating storage system. Subsequent to this project, INTEC had designed and supervised the construction of a number of insulated lines including some for hydrate prevention in special alloyed sour gas pipelines, and others for arctic applications to prevent permafrost degradation.

Other insulated pipeline projects, which INTEC performed include:

• Exxon Mica Field - INTEC defined a pigging system, wax and hydrate remediation procedures and flowline repair scenarios for a deepwater 28 mile dual flowline tie back system involving an 8-inch in 12-inch insulated pipe-in-pipe (PIP) flowline and a conventional 8-inch flowline in water depths ranging from 1,300 ft to 4,500 ft. A pigging program was developed for wax management and INTEC assessed viable methods for location and remediation of blockages and developed a proposed strategy for pipe-in-pipe repair.
• Exxon Marshall Madison Flowline Project - design of three subsea wells and 6-inch by 10-inch pipe-in-pipe insulated production flowlines in water depths approximately 4,800 ft.
• Exxon Mobil Mobile Bay MB63-2 Flowline Project - tie back flowline bundle consists of a Castelloy/carbon steel pipe-in-pipe production flowline, a diesel/water dilution service flowline and a power/communication cable.
• Exxon MB 61-1 Flowline Project - INTEC scope was to engineer for use of existing surplus pipe-in-pipe to accommodate field expansion.
• Exxon Mobile Bay Flowline Project - This project included detailed design, component testing and installation supervision of several high temperature, and high pressure insulated sour gas flowlines in Alabama. The design entailed the first use of ultra high strength corrosion resistant materials for carrier pipe applications, which required development of patented welding procedures.
• Oxy San Miguel Insulated Pipeline Project - Included design of a 20-inch diameter insulated system with a 26-inch jacket.
• BP Amoco King / King's Peak Pipeline Study - INTEC was responsible for preliminary design of insulated and non-insulated flowlines, export pipelines and SCRs, as well as development of procedures and supervision of tests on Pipe-in-Pipe and Vacuum Insulated Tubing to validate heat transfer coefficients.