... It boasts a full range of inspection equipments and test methods and a strong technical force.For many years, our ... on the operation concept of "quality first and continuous improvement", and has provided a large amount of high-quality ... to schxxsSurfaceGalvanized or coatedTechniqueCold drawn, hot rolled, hot expansionTypeRound pipe and square pipeMaterial20#, 45#, Q235, 20G, A106B, A53B, AISI 1010, ...