See for steel composition of ASTM A333 Gr.10 steel tube, whether it is uniform enough. Because of the inferior ASTM A333 Gr.10 steel tube, there are more impurities in the pipe, and the density of steel is too small. As soon as we look at the cross section of the pipe and see that there is some confusion in the composition of the pipe, then it must not be a seamless steel pipe.
Poor quality ASTM A333 Gr.10 steel tube, the size of the out of tolerance is very serious. So we can use a verier caliper to check the dimensions of each part of ASTM A333 Gr.10 steel tube to see if it meets the standard of seamless steel pipe. If there is no vernier caliper, we can weigh and check the steel pipe.
The inner diameter of the inferior ASTM A333 Gr.10 steel tube fluctuates greatly, while the inner diameter of the qualified ASTM A333 Gr.10 steel tube is also very stable.