Abstract
Sand particles from oil and gas production may cause considerable erosion damage in critical parts of transport and processing equipment such as valves and chokes. Increased longevity of such components will lead to significant savings as offshore oil and gas production move subsea, and it can be achieved in two ways; through selection of erosion-resistant materials or through design optimization. A total of 28 different materials including standard steel grades, solid tungsten carbide materials, coatings and ceramics have been tested under various impact angles and velocities of sand particles, and examined for erosion characteristics. The test results have been used to determine empirical model equations and to determine the relative erosion resistance for the materials. The results show that a longevity gain factor of up to more 10 2 is possible to achieve by selection of proper material. Optimization of choke design for a needle choke has shown that additional savings with a factor of more than 10 2 is obtainable.
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