Stainless Steel Pipe with 0.5 to 50mm Heavy Wall Thickness, ASTM/DIN Standards API 5L Line Pipe Seamless Steel Tubes ... Stainless Steel Pipe with 0.5 to 50mm Heavy Wall Thickness, ASTM/DIN Standards API 5L Line Pipe Seamless Steel Tubesstructure ... PipeSpecial pipe Regular and special thick-walled steel pipe, maximum thickness of up to 60MMUsage widely used in mechanical processing, petrochemical ...