In adhering to ISO9001 and API SPEC quality system, our pipe products have passed the certificate of API 5CT, API value="5" hasspace="False" negative="False" numbertype="1" tcsc="0" u1:st="on">value="5" unitname="l">value="5" hasspace="False" negative="False" numbertype="1" tcsc="0" u1:st="on">5L and National Oil Pipes Quality Supervision and Inspection Center. Our company have been an important domestic manufacturer in special steel round bar, hot-rolled pipes and oil casing pipes that are placed in the importantly developing metallurgical products series of Shandong Province “11th Five-Year Plan”.
