... : ASTM, DIN,GB Grade: CGCC, Prepainted galvanized steel coils ( corrugated roofing panels ):PPGI is the material which uses galvanised steel ... coil coated steel, color coated steel etc.A galvanised steel sheet in coil form is cleaned, pretreated, applied with various ... Prepainted galvanized steel coils :Outdoor: roof, roof structure, surface sheet of balcony, frame of window, door, garage doors, roller ...