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1.1 Instrument List The Instrument List tabulates instrument numbers, description, service and P&ID numbers in addition to other information on individual devices that might be required for a given project. 1.2 Instrument Specifications Specifications for commonly used instrumentation are prepared in standard ISA data sheet format and contain information from P&ID's, vendor catalogs, calculations, and piping drawings. Special instrumentation such as analyzer systems may require a complete specification document. 1.3 Local Enclosures Panels or racks mounted near the process equipment which contain field devices such as transducers, solenoids, and I/P or P/I converters. They are normally NEMA 4 design with many devices pre-wired to industrial terminal strips. 1.4 Local Control Panels Operator interface panels with controllers, pushbutton and indication needed for process local startup or local control of a specific operation. 1.5 Instrument Air Piping These drawings indicate the general location of all instrumentation that require field piping, air connections, or pneumatic signals. They are made to scale so that a reasonable estimate of material quantities can be made for construction and they are a scope document for subcontract work. 1.6 Construction Specifications Specifications that describe the work required to install instrumentation by field contractor. Typical specifications include calibration and commissioning, installation work scope, instrument wiring, and control panel fabrication. 1.7 Instrument Systems Wiring Diagrams Drawings produced to provide connection information for complicated systems such as analyzers, halon, L.E.L., and chromatograms. 1.8 Instrument Installation Details The Instrument Installation Detail shows the piping arrangement for the mounting and connection of field instrumentation items. These drawings contain a complete Bill of Material for piping requirements and a reference to the instrument tag numbers. 1.9 Purchase Requisitions All work necessary to complete purchasing on instrumentation including requisition preparation, bid tabs, and purchasing assistance. |