seamless steel pipe Size:OD:20.34-610MM,W.T:5-80mm, ... # ,45# ,Q345, Q235 , standard:AISI,API,JIS Seamless steel pipe1Type: seamless pipes, welded pipes, welded pipes, rectangular pipes, square pipes, polished pipes, seamless tubes.2 Process methods: cold draw and ... , please feel free to contact us for more professional information. seamless steel pipe