Learning paths
Everything on this site is free to read, and the topics are written to stand alone. But a reader who needs to learn a subject rather than look something up is better served by a route than by an index.
Each path below takes existing topics in a deliberate order, adds what to practise at each step, and says what you should be able to do at the end.4 paths, 20 modules.
The foundation path
Piping Components, Materials and Specifications
Read any line list, decode any line on it, say what every component is made of and why, and challenge a specification before it reaches a fabricator.
The components path
Valves, Fittings, Flanges and Specialty Items
Pick a valve for its duty rather than for the drawing, understand why most flange leaks are assembly rather than hardware, and know what a fail position decision is actually deciding.
The drawings path
Reading P&ID, PFD and Isometric Drawings
The highest-leverage skill on a project. Learn to read the documents every discipline argues in front of, and to know which one governs when they disagree.
The project path
Practical Workflow and Field Coordination
How a design becomes a plant — and how the handover, the permit and the inspection regime decide whether it keeps running safely for forty years.
How the paths relate to the topics
A path holds no teaching of its own. Every module points at the topics that already teach it, so following a path and browsing the site reach exactly the same pages — the path just decides the order and tells you what to practise.
That is deliberate. Nothing is held back from the free site to make a paid version look better.