1.ASTM oil seamless steel pipe 2.customized sizes available 3.standard ... ,SGS,IBR 4.resonable price,high quality Wuhan Haihong steel Co., Ltd was established on Nov. 25th, 2000 ... in our company and 300,000 tons of seamless steel tubes factory as our sub-companies. Our products has more ... than 300 specifications and almost 1000 kinds of building steel structure materials with the standards of GB,API,ASTM ...