cangzhou aolong steel pipe co.,ltd cangzhou aolong import and export co.,ltd Seamless steel pipe ASTM A53/106 top quality CANGZHOU AOLONG Application: used for liquid conveyance, lowmedium pressure boiler, high pressure boiler, heat exchanger SIZE: 1/4???-48???. OD: 21.3mm-1219.6mm. Wall thickness: 2.77mm-19.06mm STANDARD: GB/T8163-1999, GB/T3087-1999, GB/T5310-1995 ASTM A53/A106/A192/A179 DIN1626/DIN17175/DIN1629 Place of origin: HEBEI CHINA BRAND NAME: GY MATERIAL: 10/20, GR.B/GR, A-1, ST45/ST45.8/ST35.8/ST35.4 LENGTH: 3M-12M. Customized PACKING: in bundles with steel strip and other packing accessories