Traditionally, onshore oil and gas processing plants have been 'stick built'; that is, they have been fabricated on site, a piece at a time. In the 1970s, however, engineers working on offshore projects developed techniques of modularisation, which saw huge pieces of equipment built on land at fabricators' yards and then carried to their location on barges. Since the mid-1980s, these techniques have begun to be used in a new way for onshore projects.
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