Hydraulic fluid or air in the tank from the unit to buyers, buyers to the tank are again carrying from the elements. High pressure seamless steel pipes from the cold seamless pipes are manufactured in EN 10305-4 E235+N ( st37-4 NBK ) or E355+N (st52 NBK ) quality standards. Both ends are closed and are suitable for bending. Where used according to the purposes of either oily, phosphated and cr6-free zinc galvanised. They are widely used, at first hydraulic units and systems, automotive, machinery manufacturers, agricultural and construction machines, mobile cranes, the iron - steel mills and the shipyards.
