ASTM A53/A106/API 5L Carbon Steel Seamless Pipe 1.Standard:ASTM,API,DIN 2.Grade: 10#-45#, 16Mn, A53-A369, API J55-API CARBON STEEL ... painted to prevent rust . TYPESeamless steel pipe (hot finished steel tube )StandardDIN17175,DIN1626,DIN2448,DIN17120,API 5L, API 5CT, ASTM A106, ASTM A53,ASTM ... ,GOST8731MaterialGr. B, Gr. C; X42,X46,X52,X60,J55,K55,N80; st37,st42,st42-2,st45.8,st52,Gr 20,STPG410 ...