1.JCOE welded steel pipe 2.OD:406mm-914mm 16"-36" 3.WT:9.5mm- ... StandardGB/T3091-2001,GB9711.1-1997,ASTM A53,DIN1626Application:structure steel pipe,boiler pipe,petroleum,gas.Our quality policy:Facilitating quality,Servicing honesty ... :Dedicated manufacture,High quality,Dependent honesty,Best service. st37 JCOE Welded steel pipe