Profile: N-STEEL (SHANGHAI) CO.,LTD. deals with seamless (stainless/alloy/carbon) & welded(ERW/SSAW/LSAW) steel tubes and cylinders(CNG/LPG/Oxygen,fire-extinguisher). Steel pipes include stainless seamless pipes, carbon seamless pipes, alloy tubes/boiler tubes and cylinder tubes. Our CNG seamless steel gas cylinders are used for automotive vehicles.