Shanxi Province-based Chinese steelmaker Taigang Stainless Steel Co., a subsidiary of Taiyuan Iron and Steel (Group) Co., has announced that it has received three certificates, including API Spec Q1 for petroleum and chemical quality management system, Spec 5CT forOTCG casing and Spec 5LC for wear-resistant alloy pipe steel, according to which the company can produce oil casing and wear-resistant alloy pipe steel in line with American Petroleum Institute (API) standards.