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Root Causes and Practical Protection Measures 1. Introduction In chemical and process industries, the reliable operation of field instruments is critical to production safety and efficiency. During the rainy and thunderstorm season, instruments are particularly vulnerable to failures caused by moisture ingress, water accumulation, and lightning strikes.This document provides a structured guide to rainproofing and […]

1. Introduction Plant start-up and shutdown are routine operations in chemical plants. While short-term shutdowns have limited impact on instrumentation, extended shutdowns—such as those required for major overhauls or unexpected events—demand careful attention from instrumentation engineers and technicians. Improper handling can lead to equipment damage, delayed commissioning, or even safety incidents.This document provides technical guidance

01. Why Establish an Instrument Ledger? 1.1 Clarify Asset Inventory A well-maintained instrument ledger helps answer three foundational questions: How many instruments are installed in the plant? What are their models and technical parameters? Where are they installed, specifically? Many facilities struggle to provide immediate answers to these questions. A precise ledger serves as a

Abstract In modern process industries, most equipment and system failures can be traced back to a limited set of underlying causes. This article summarizes the seven most common factors that affect industrial automation and control systems, explains their impact, and provides recommended countermeasures for engineers and maintenance teams. 1. Measurement Signal Problems Accurate measurement is

Abstract In modern industrial production, automation instruments are key tools for process monitoring, control, and safety assurance. To ensure accurate identification, rational arrangement, and efficient management of numerous instruments, the industry widely adopts instrument tag numbers as a standardized method of identification.This article explains the significance of tag numbers, common compilation rules, international standards, and

Abstract The immersion depth of industrial temperature sensors such as thermocouples, resistance temperature detectors (RTDs), and bimetallic thermometers directly affects the accuracy and reliability of measurement. Despite clear guidelines in standards such as SH/T 3005-2016, inconsistent practices are often observed in engineering applications. This article summarizes the principles of thermometer immersion depth, analyzes common misconceptions,