Guyed derrick type stacks are one type of support system for an elevated flare. The elevated flare tip is mounted on top of a riser supported by both a steel trussed derrick structure and through a system of cables (guy-wires), typically arranged with a set of three (3) cables at 120 degree angles. Similar to a guyed flare, a guy derrick flare requires multiple deadman foundation anchors to anchor the cables to the ground, and therefore this support system necessitates a larger plot space than other support systems. It also requires a smaller, more economical derrick structure compared to a conventional type of derrick supported flare. Guyed derrick flares eliminate concerns associated with process temperature designs. Derrickĭerrick type stacks are one type of support system for an elevated flare. Derrick supported flares require three or four additional foundations for the derrick legs, but this is a relatively smaller plot space when compared to a guyed flare of the same height. Derrick flares eliminate process temperature design concerns. Additionally, a single common derrick structure can support multiple flare risers. Demountable Derrickĭemountable derrick type stacks are one type of support system for an elevated flare. The elevated flare tip is mounted on top of a riser supported by a steel trussed (derrick) structure. Similar to a conventional derrick supported flare system, demountable derricks require three or four additional foundations for the derrick legs. Due to the economic impact of shutting a flare down and the requirement for large cranes, users welcome a means to be able to lower the flare tip to grade for maintenance, inspection, or repair activities without ever having to shut the flare down.

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