Learn P&ID symbols and flow diagrams step by step. Beginner-friendly guide to piping design, line numbering system, piping class, ASME B31, and oil and gas piping. Introduction A P&ID (Piping and Instrumentation Diagram) is one of the most important technical documents used in Piping Design and Piping Engineering. It represents how a process system is … Read more
In any process plant, pipes are more than just hollow tubes carrying fluid. They are pressure-containing components expected to work safely for 20, 25, sometimes 40 years. During that life, corrosion is not a possibility — it is a certainty.That is where corrosion allowance comes in. As a piping engineer, understanding corrosion allowance is one … Read more
When you first step into a plant site or start reading piping drawings, everything may look confusing—pipes going everywhere, strange symbols on drawings, and many unfamiliar names. Over time, you realize that a piping system is not just pipes. It is a collection of piping components, each with a specific role. Understanding piping components is … Read more
When someone starts learning piping engineering, one of the first and most important topics they must understand is piping materials. In real plants, most piping problems do not happen because of poor drawings, but because of wrong material selection. Over the years, I have seen leaks, cracks, corrosion failures, and even shutdowns—all linked back to … Read more
If you are new to piping engineering, or even if you are working in the field for a few years, you will often hear terms like NPS, DN, and Schedule. Many beginners get confused and sometimes even experienced engineers mix these terms during discussions. I will explain NPS, DN, and Pipe Schedule in a very … Read more
Piping vs Pipeline is one of the most important topics in mechanical and piping engineering. Although both systems are designed to transport fluids, piping vs pipeline comparisons are essential because they differ significantly in design philosophy, operating conditions, applicable ASME codes, construction methods, and maintenance requirements. Choosing between a piping system and a pipeline affects … Read more
Introduction When I started my career in piping engineering more than 20+ years ago, the first question my senior asked me was very simple: “Do you really understand what piping is?” Many new engineers also confuse piping with pipelines. While both transport fluids, they serve different purposes and are designed according to different standards. If … Read more