Detailed relation for steel pipe on tolerance about shape and straightness

We’ve emphasized for many times that steel pipe with different standards would have different characters. Even for same big type, like seamless steel pipe, we can category lots of different characters according to the detailed production process.

Here is a list for the relation of tolerances on shape, straightness and mass:

From the list, we can tell the exact relation between outside dimensions, out of roundness, concavity, squareness of side and so on. Of course, according to the detailed explanation in the bottom of the list, we can get it clearly. We believe this would contribute for your option when you purchase the steel pipe.