Back pressure, as the name implies, refers to the static pressure that exists on the downstream side of a flow system. It represents a form of resistance against the direction of fluid flow and plays a crucial role in various industrial processes involving liquids or gases. This article explains what back pressure is, its key […]
1. Objective To ensure that all automation instruments used in chemical production—such as temperature, pressure, flow, level, and analytical instruments—operate in an accurate, reliable, and safe condition. This aims to: Prevent production fluctuations, product quality issues, safety incidents, and environmental pollution caused by instrument failures. Extend the service life of instruments and optimize maintenance costs.
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In the realm of industrial automation, accurate measurement and control of key physical parameters are essential for optimizing processes, maintaining safety, and ensuring product quality. Understanding these core measurement parameters allows industries to function with precision, efficiency, and reliability. The five most critical parameters in this context are pressure, temperature, flow, liquid level, and position/velocity.
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From Weekly Instrument Replacement to Over a Decade of Stable Operation — A Classic Low-Cost Retrofit in a Harsh Chemical Environment 📌 Background In a low-temperature methanol wash unit used in coal gasification downstream processing, an external level transmitter was originally installed to measure the acidic gas condensate in a stripper separator. However, just six
Ultrasonic flaw detectors are indispensable tools in modern non-destructive testing (NDT), widely used in industries such as manufacturing, construction, and aerospace. These instruments rely on the propagation characteristics of ultrasonic waves within materials to detect internal defects. Over time, environmental factors and frequent use can lead to drift in performance parameters. As a result, regular
Ultrasonic Flaw Detector Calibration: Principles, Standards, and Best Practices Read More »
Overview In pressure vessels, pipeline systems, and high-temperature/high-pressure industrial equipment, flanged connections serve as crucial detachable joints. Bolts play a core role in transferring preload to the gasket, directly impacting sealing performance. Although austenitic stainless steel bolts such as 304 and 316 are sometimes used, many installations report frequent leakage. This document analyzes the reasons
Can 304 Stainless Steel Bolts Be Used in Flanged Connections? Read More »
Despite the promise of automation, manual interventions and recurring oscillations still haunt many industrial processes. Are these signs of control limitations — or misconceptions about what “automatic” truly means? 👻 The Two Ghosts of Automation: Manual Intervention & Oscillations In the battlefield of industrial control, two persistent “ghosts” continue to challenge engineers and operators alike:
🔧 Why Are Operators Still “Firefighters” in Automated Control Systems? Read More »
In industrial operations, an excessive maintenance workload for instrumentation equipment is rarely caused by a single issue. Rather, it is the result of multiple interrelated factors—ranging from flawed initial planning to inadequate operational management. Based on common issues observed across various industries, this document categorizes the root causes into six key dimensions: 1. Initial Planning
In industrial settings, electrical and instrumentation (E&I) cable trays or bridge racks play a critical role in organizing and supporting power, control, and signal cables across facilities. An effective layout ensures safety, minimizes interference, reduces maintenance time, and keeps the overall system organized. Below are the key principles to guide the layout of E&I cable
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In the field of industrial instrumentation, it’s common for engineers and suppliers to request detailed parameters for flow and level instruments, but not for pressure and temperature devices. At first glance, this might seem inconsistent—but there are sound technical and practical reasons behind this practice. In this article, we’ll explore why flow and level measurements
