... .79- 4.72inch 3. as per API 5L Large diameter linepipe for conveying gas ,water, and petroleum ... PSL1/PSL2. B,X42, X52, X56, X 603. Size range : outside diameter : 8.6 - 31.93inch, ... steel tubes. It can produce seamless pipes with large size range from 219 to 811mm, wall thickness upto ... -line heat treatment , high precise straightening mill, large NDT test machine and hydrotest inspection mill, The ...