... 4.standard:AISI,GB,JIS/PPGI prepainted steel coil or sheet/PPGIStandardASTM A653, JIS G3302,GB/T3830 ... in the middle and outside GI steel sheet to be covered by steel strips with lock 1 The ... steel coilStructural use ,roofing,commercial use,household appliance,industry,familySPECIAL APPLICATIONof prepainted steel coilWear resistant steel,high-strength-steel plateppgi steel coil Painted Galvanized Steel ...