Читать книгу Automation of Water Resource Recovery Facilities - Water Environment Federation - Страница 82

ISA Standard S5.4 details the content and format standards for loop diagrams. Each diagram traces the complete route of a control loop’s wiring. They are useful during installation and critical for system maintenance. Loop diagrams cannot be prepared during the design phase because they involve actual vendor shop drawings and documentation. Instead, they are created during the shop-drawing phase by the design engineer or the contractor’s system integrator.

In general, it is better to have the design engineer prepare loop diagrams, although it depends on whether the owner is willing to pay for this service as part of the design fee or as part of construction costs. Some owners may not require these drawings and simply rely on other documents already produced instead. Whether a loop diagram is used or not depends on maintenance practices at specific facilities.