One of African customers asked us to send him an email for the detailed production description for the spiral welded pipe. Today, we would like to talk some grades of the steel pipe for details.

This chart would list four main parts for explanation of the steel pipe. They are standard, tolerance of pipe body, tolerance of pipe end and tolerance of wall thickness. Once there is change on one properties, all of the characters would change too. So this is the main concern for us to think twice. And this chart would give you guidance once you need to choose the suitable one for your projects.