SPIRAL STEEL PIPE
OUTSIDE.D  8"-135"-219--3220mmW.T 6--18mm
STANDARD : API5L SY/T5037-2000 GB9711.1 GB9711.2
MATERIAL:  API5L.B/X42/X52/X60/X70 etc.
ST37,ST44,ST52, Q235B/Q345B/L245/L290/L360/L415/L485/20#