Seamless carbon steel pipes,black steel pipes,mild steel pipes Production Craft:Hot Rolled,Cold Drawn Out Diameter: 21.3MM~660MM Wall Thickness:2.5mm~60mm Length:2m~12m Mill Test Certificate:EN 10204/3.1B Material:ASTM A106 GR A/B/C,ASTM A53 GR A/B, API 5L GR B,A210, A252, A333,ASTM A335 GR P5,P22,P91,P9,P1,P11; API 5L PSL1 PSL2 X42, X46, X52, X60, X65, X70; 20#,20G,Q345, Q235,16Mn, L245~L555;JIS STPG42,G3454,G3456; St37, St42, St45, St52, DIN 1626, DIN 17175 etc. Standard:GB/T 8162-2008 ASTM /ASME B36.10M, API 5L,API 5CT, JIS, DIN 17175,DIN17100, DIN1626, BS1387,BS6323,BS10210,BS3602,EN10217,EN10219,AS1163, AS1074,GOST 8696-74,GOST 8731-74,GOST 8732-78 etc.