Refer to A554 Standard Specification for Welded Stainless Steel Mechanical Tubing. All products are labeled by the designation MT-[XXX] (Mechanical Tubing)
Can you start with: where did you get this, what Code, par. Or document. I see that it s a stainless number as 304 SS. Or A/SA x x x TP304 . you need to supply more data.