... ) Professional supplier of Seamless steel pipe 1.Commodity NameSeamless oil casing pipe2.StandardASTM A106 ,ASTM A53 ,API5L B , ... building, liquid service, petroleum cracking, chemical fertilizer equipment, drawing-oil-equipment and structure purposes. About our company: Established in ... great popular at home and abroad ,Such as American,Australian,European,the Middle East,and Southeast Asia. We will ...