... and DL/T 646 2006 Torlance: +- 2 % Colour: black,white,blue Welding standard: AWS D 1.1 Gavanization standard: ASTM ... ,drill holes ,quality check before galvanized, hot dip galvanized or powder coating , final quality check according by client required. 1 ... ,drill holes ,quality check before galvanized ,hot dip galvanized or powder coating ,final quality check according by client required. Features:1 ...