316 Marine Stainless Steel Pipe is widely used for marine applications. In Marine environment, marine Tube Material must be made clear as to whether the ss is submerged in seawater or is simply near enough to the seashore such that it can be attacked by the chloride present in seawater by splashing or carried by onshore breeze. 316L Stainless Steel Tube is typically considered the minimum grade for use in such a marine environment near the seashore.