... with you. Main specifications of ERW pipe Out diameter thicknessAvailable steel gradeInches mmtolerance mmtoleranceQ195, Q215, Q235, Q295, Q345, 10#, 20#, 16Mn ... +/- 1%3.0-8.0+/- 12.5% Company introduction: HENGJI Steel have 12 ERW pipe production lines and 2 hot-dipped ... , gas transportation, scaffold and many construction projects and so on. Carbon Steel ERW Pipe