... " to 48" 4 Thickness: 2.11 -59.54mm PRODUCT NAME:big size erw carbon steel pipeSTANDARD:DIN 1629/3, DIN 1630, DIN ... strictly.5. Application: for use in the Pulp and Paper, Water Treatment, Sewage Treatment, Chemical, Biotech, Pharmaceuticals, Food, Mining, Architectural, Transportation ...