Hot Dip Galvanized Steel Pipe 1) W.T.:1.2-16mm 2) O.D.: 21. ... dip galvanized steel pip3) Outer diameter:20-323mm;Thickness:1.5-16mm,Length:1-12mm4) Steel grade:Q195/235/345,SS400 ... ,SS500,ST37,ST52,SPHC,08F,HG5,DF08,5) Standards:BS1387/1985,ASTM A53/A36,EN39/EN10219,API 5L ... quantity of order:20MT4)Delivery period :15 to 30 Days High Quality Galvanized steel pipe/tube