The evolution of crude oil extraction and processing technology has lead to an increase in the temperatures that the internal linings of processing and storage vessels must withstand. The increasing temperatures may be due the depth of the oil reserve the techniques (such as pressurized steam) used for extraction or because the high viscosity of certain crude oils requires high temperatures for them to remain fluid. The chemical environments range from mostly crude oil with a little bit of water (as in a crude oil storage tank) to mostly water with residual oil and other chemicals (as in Produced water) with every possible combination of hydrocarbon liquids and gases hydrogen sulfide carbon dioxide and water in between. In addition to the high temperatures high pressures may also be involved which can affect the performance of the lining. These environments may be present in both onshore and offshore oil gas production facilities. This paper discusses aspects of lining formulation and testing to meet the demands of these high temperature (>90 C) and high pressure service environments.