CANGZHOU AOLONG STEEL PIPE CO. LTD. CANGZHOU AOLONG IMPEXP TRADE CO., LTD. Supply Seamless steel pipe Application: used for liquid conveyance, lowmedium pressure boiler, high pressure boiler, heat exchanger SIZE: 1/4"-48" Wall thickness: 1.5mm~40mm STANDARD: ASTM A53/106 Gr. B, ASTM A210/192/179, API 5L, API 5CT, DIN 1626/17175, etc. Place of origin: HEBEI CHINA BRAND NAME: GY LENGTH: 3M-12M. Customized PACKING: in bundles with steel strip and other packing accessories