This pipe is a good fit for most structural applications. To earn this title, the mill has downgraded this pipe from prime pipe for one reason or another. This can be from a multitude of reasons ranging from pure looks to failing any assortment of tests. This pipe is brand new out of the mill, but because of the downgrade, it is less expensive and often a better match for anyone needing their pipe for a structural application. The purchaser must be aware of the pipe they are buying, so do not hesitate to ask as many questions as needed to really understand why the pipe is considered “secondary”.