1)SS 201 Stainless Steel Round Pipe 2)SIZE:1/4"-36"*Sch5-Sch160.XXS 3)Thickness:1.8--60mm 4)Standard:API 5L ... for petroleum 20, 12CrMo,15CrMo, Cr5Mo, Cr9Mo GB9948-8810-530*1.5-36Boiler pipes for refinery,heatexchangeing pipes,seamless steel pipes ... feedingStructural pipe10,20,35,45, 16Mn,Q345BGB/T8162-19996-1020*1.5-100For commom structureLine pipeGr..BAPI5 L/CT21.3-914 ...