... -DN630(pipe)/DN300-DN1620(plate)2) Material: stainless steel such as 304, 304L, 316, 316L, 321, and carbon steel3) ... treatment: black rust-proof oil, transparent oil, hot galvanizing or as customer’s special requirement.5) Wall thickness: SCH10, SCH20, SCH30, SCH40, ... etc.Best service:1, Good communication with every of our customer, especially willing to discuss the details of your drawings.2 ...