1,black steel plate 2,1.22m*2.44m 1.5m*6m Hebei Runcheng Steel Pipe Co., Ltd ... , T8163, T3087, 10#20# specification 1/ 2" -34", SCH10-SCHXXX wall thickness. 1 general purpose of seamless steel pipe ASTM ... welded ASTM A106, A53, specifications:1/ 2 " -24",21.3-609.6mm 2 British standard ERW high-frequency welded ... pipe BS1387, specifications:1/ 2 " -12", 21.3-323.8mm The ...