Galvanizing. Galvanizing shall be applied by the hot dipped process. The preparation for galvanizing and the galvanizing process shall not adversely affect the mechanical properties of the material being coated. The zinc coating shall be clean, of uniform thickness and free from defects. When zinc spray coating is used, surfaces shall be shot blasted before spraying. Drilling, punching, cutting, bending and removal of burrs shall be completed before galvanizing/zinc spray coating. The average thickness of the zinc coating shall be equivalent to not less than 0.6 kg/m2 of zinc for all surfaces, except steel wires. The thickness of the zinc coating for steel wires shall be in accordance with a national standard and shall be approved by the Engineer. Material on which galvanizing has been damaged shall be re-dipped unless, in the opinion of the Engineer, the damage is local and can be repaired by applying a coat of galvanizing repair paint. Where such a repair is authorized, tdamaged area shall be cleaned bwiping with clean rags saturated with mineral spirits or xylene followed by wire brushing. After wire brushing, the area shall be re-cleaned with solvent to remove residue and shall be given a minimum of two coats of zinc rich paint in accordance with the manufacturer’s instructions. Samples selected by the Engineer of all galvanized material shall be subjected to the galvanizing tests set out in the appropriate material standard (eg BS 443/BS 729). Sheradizing or other similar processes shall not be used unless expressly approved by the Engineer. Surfaces in contact with oil shall not be galvanized or cadmium plated.
Galvanizing. 6.10.1 Sample Tests Representative samples, selected by the Engineer of all galvanised material shall be submitted to galvanising tests. Galvanised fittings associated with insulators and steel cores for aluminium conductor steel reinforced cables shall be tested in line with the relevant IEC Recommendation. All other fittings, fabrications, hardware and fixings shall be inspected and tested in accordance with ISO Recommendations R1460 and R1461.
Galvanizing. Hot-Dip Galvanized Finish: Apply zinc coating by the hot-dip process to structural steel in accordance with ASTM A123/A123M.
Galvanizing. For those items indicated for galvanizing, apply zinc coating by the hot-dip process complying with ASTM A 123/A 123M.
Galvanizing. The process of applying molten zinc to steel. (The Towers, Steel Poles, Equipment Shelters, Steel Accessories Components, Installation Services and Galvanizing are hereinafter collectively referred to as the "PRODUCTS".)
Galvanizing. A. Hot-Dip Galvanized Finish: Apply zinc coating by the hot-dip process to structural steel according to ASTM A 123/A 123M.
1. Fill vent and drain holes that are exposed in the finished Work unless they function as weep holes, by plugging with zinc solder and filing off smooth.
Galvanizing a. Fabricate steel to be galvanized in accordance with ASTM A143, ASTM A384, and ASTM A385. Avoid fabrication techniques that could cause distortion or embrittlement of the steel.
b. Provide venting and drain holes for tubular members and fabricated assemblies in accordance with ASTM A385.
c. Remove welding slag, splatter, burrs, grease, oil, paint, lacquer, and other deleterious material prior to delivery for galvanizing.
d. Remove by blast cleaning or other methods surface contaminants and coatings not removable by normal chemical cleaning process in the galvanizing operation.
e. Hot-dip galvanize steel members, fabrications, and assemblies after fabrication in accordance with ASTM A123/A123M.
f. Hot-dip galvanize bolts, nuts, washers, and hardware components in accordance with ASTM A153/A153M. Oversize holes to allow for zinc alloy growth. Shop assemble bolts and nuts.
g. Galvanized steel sheets in accordance with ASTM A653.
h. Galvanize components of bolted assemblies separately before assembly. Galvanizing of tapped holes is not required.
Galvanizing. Galvanizing, as specified herein, shall conform to the requirements of ASTM A123 or ASTM A153, as applicable.
Galvanizing. For chain link fabric: to CAN/CGSB-138.1 Grade 2. .2 For pipe: 550 g/m² minimum to ASTM A 90.
Galvanizing. General Galvanising of iron and steel articles shall be carried out by the hot dip process. The preparation for galvanising and the galvanising process shall not adversely affect the mechanical properties of the material coated. All galvanising shall be in accordance with BS 729, ISO 1460 or an equivalent approved standard to give a uniform thickness, free from defects and a minimum average coating weight. Galvanised finned tubing shall have a minimum average thickness of 70 microns. Other methods of depositing zinc coating such as sheradising, electroplating or metal spraying shall not be used unless specifically approved. Surfaces which are in contact with fluid shall not be galvanised or cadmium plated. The identifying marks on any galvanised parts shall be stamped before galvanising is applied and shall be clearly legible afterwards. Zinc coated fasteners such as nuts and bolts should be lubricated with beeswax or other suitable lubricant prior to fitting and tightening. Material on which the galvanising has been damaged shall be re-dipped.
