EN 10210-1 Grade S355NH Pipes European standard covers specialized conveyance conditions for hot formed or annealed hollow sections from construction steel. Pipe will be supplied in 5-7 metre arbitrary lengths with butt-weld ends and varnished to stay away from the oxidation of the steel when in storage. All pipes are fully certified and traceable with heat numbers hard stamped onto e... https://www.triosteel.com/en-10210-1-grade-s355nh-pipes/