Pipeline

Understanding DN, D, De and Ø in Engineering Practice In many projects, pipes and flanges fail to fit during installation. This problem is often attributed to poor communication, purchasing mistakes, or site workmanship.However, from an engineering and inspection perspective, the root cause is usually much deeper — and far less intuitive. DN itself is not […]

Introduction In industrial piping systems, strainers are rarely the most expensive components, nor are they usually the focus during the design stage. However, in actual operation, many problems that appear to be incidental—such as abnormal pump wear, control valve sticking, or gradual deterioration of heat exchanger performance—can often be traced back to insufficient filtration or

In many engineering systems, gas and liquid do not flow independently, but coexist, interact, and flow together. This phenomenon is known in fluid dynamics as gas-liquid two-phase flow. Two-Phase Flow: Definition and Characteristics Two-phase flow refers to the simultaneous interaction of two different phases (gas and liquid) within a pipe or conduit, resulting in unique

Introduction Negative pressure in pipelines—defined as internal pressure falling below atmospheric pressure—is a common but often underestimated engineering issue.In practical operation, negative pressure can lead to serious consequences, including: Pipeline collapse or deformation Equipment damage caused by excessive suction forces Ingress of air or toxic gases into the system Increased leakage risk and accelerated fatigue

When working with piping systems, understanding the relationship between Nominal Diameter (DN) and Outside Diameter (De) is crucial for accurate pipe selection, installation, and compatibility with fittings. This guide provides detailed insights into the DN and De relationship across different types of materials, including steel pipes and plastic pipes (PVC/PE/PPR). What is Nominal Diameter (DN)?

1. Introduction Pipeline purging is a common industrial operation that plays a critical role in ensuring system reliability and safety. It removes impurities such as welding slag, rust, and other debris from pipelines, preventing potential damage to downstream equipment. In applications such as syngas production and compressor systems, effective purging is essential for stable and

Introduction High-temperature steam and dense chemical liquids are at the core of coatings, adhesives, high-performance lubricants, and specialty fluids. For chemical plants, processing these high-viscosity materials means mastering intense heat and shear forces to ensure stable quality and consistent production. This article explores cutting-edge process technologies to overcome common issues such as pipeline clogging and

1. Common Pitfalls in Piping Installation Piping installation is often perceived as a routine task in industrial projects. However, even minor mistakes can lead to catastrophic system failures. Based on years of field experience, here are six common issues encountered during piping installation: 1.1 Poor Interpretation of Drawings and Improper Fit-Up In many projects, construction

In large-scale chemical, power, and petrochemical projects, piping and instrumentation may seem inconspicuous, but they are the “nerves” and “blood vessels” of the entire facility. When designed properly, systems operate reliably, require less maintenance, and deliver accurate data. When designed poorly, they become sources of error, constant alarms, frequent repairs, or even serious safety hazards.

Stainless steel, known for its excellent overall performance and aesthetic surface characteristics, is widely used in various industries—including in level instruments and fluid transport systems. Among its many forms, stainless steel pipes are the most commonly applied components. These pipes can be broadly categorized into two types: seamless stainless steel pipes and welded stainless steel