Some of the questions that come up about Line Numbering include: What is it? Why is it? What does it mean? Who does it? Another question is that is often asked “is there a common pipe line numbering system? Do engineering companies and clients have different line numbering systems? Another question is: Does ASME B31.3 or CSA (Canadian STDs), have a standard for line numbering?
These are all good questions and it is important for every piper to know the answers to each one.