YANTAI LUBAO STEEL PIPE CO., LTD. IS A LEADING SEAMLESS STEEL PIPE MANUFACTURER IN CHINA,IT HAS A CAPACITY OF 300,000MTONS ANNUALLY,THE MAIN PRODUCTS ARE:SIZE:159MM-325MM*5-20MMSPECIFICATIONS: ASTM/ASME A53/SA53 GR.A,B;ASTM/ASME A106/SA106 GR.A,B,CAPI 5L GR.B,X42,X52;DIN1629 ST37,ST44,ST52,EN10210 S355