... +/-0.5mmMaterialQ195,Q235,Q345Quality gradeFirst gradeTolerence of OD±0.3mmLength3m-12m Product namewelded ... +/-0.5mmMaterialQ195,Q235,Q345Quality gradeFirst gradeTolerence of OD±0.3mmLength welded pipeOut diameter20mm ... of Nanhuan Road, 1--3 Building Phoenix Industrial Park, Liaocheng, Shandong, ChinaMobile phone15266862145Telephone86-635-2128822Websitewww.canalsteelpipe.cn welded steel pipe of factory ...