What are the requirements for instruments when starting up a chemical plant?
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Chemical plants go through several stages, including mechanical completion, intermediate handover, individual unit testing, combined system testing, and commissioning with the introduction of materials. To what extent is instrumentation work required to be completed in each of these stages? For example, should the analysis of the control cabin be carried out only during the trial run with feed material? Do DCS and SIS systems have to be fully debugged only by the time of joint commissioning? Is on-site control only used for the moving equipment during single-unit testing?
During the intermediate handover phase, the instrument circuit integration tests must be successful; it is then handed over to the operating unit for management, with the construction unit providing support.
During the commissioning phase of chemical plants, precise analytical instruments cannot be put into use; they can be utilized only after the test results obtained in the laboratory are satisfactory.