Abstract: Apparatus for simulating corrosion activity of a process stream on equipment and transport lines. The apparatus includes a series of modular canisters coupled to a process stream source and a process stream discharge point. A cooling coil is positioned within each canister and the cooling coils are interconnected in series. The first cooling coil is coupled to a coolant source and the last cooling coil is connected to a coolant discharge. The process stream flows thorough the series of canisters and the coolant flows through the coils in counterflow to the process stream to cool and partially condense the process stream. Corrosion activity and temperature within the canister are monitored using corrosion probes and/or coupons. Modular construction of the canisters permits disassembly and reassembly to adapt the simulator to different simulation applications.

Abstract: To obtain two or more fluid samples simultaneously, a sampling probe is provided which has an outer tube coaxially disposed about an inner tube. The ends of the inner tube and outer tube are typically spaced apart longitudinally, so that they may be positioned at different locations within a pipeline. Fluid flows through the inner tube and through the annulus formed between the inner tube and the outer tube. The fluid is then withdrawn from the inner tube and from the annulus for testing.

Abstract: A method of inhibiting carbonate stress corrosion cracking is determined to involve the addition of certain treatment chemicals to refinery process streams containing at least 1 of the volatile chemicals, ammonia, carbon dioxide, hydrogen sulfide, hydrogen cyanide, and water. The treatment chemical is preferably a fatty imidazoline compound or fatty amides or fatty esters or mixtures thereof.The imidazoline compounds and the amide/esters are formed by reacting tall oil fatty acids, naphthenic acids, or mixtures thereof with essentially linear heterochemicals containing amine or alcohol functionality.

Abstract: Carbohydrazide is an effective material for preventing hydrogen blistering and corrosion in the refinery overhead condensate systems of Fluid Catalytic Cracking Units.

Abstract: A process for substantially neutralizing the volatile acid gases and water present in the condensate of a distilling pertroleum product which comprises treating the distilling product prior to the condensation thereof with at least one amine having a boiling point below 95.degree. C.