Galvanising. All galvanising to be carried out in accordance with AS1627, AS2313.2, AS/NZS4680 and AS5131 and under the supervision of a competent person. Quality inspection, testing and reports are to be provided in accordance with AS2331.
Galvanising. 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.
Galvanising. (i) Hydraulic and/or mechanical press work and/or roll forming of pipe ends and/or collar type joints.
Galvanising. Gratings and the fixing clamps, bolts, nuts shall be cleaned with wire brush and galvanization shall be done in accordance with IS: 2629 and tested as per IS: 2633 and IS: 6745. Quantity of zinc coating shall be minimum 900 gms/sq.m. of surface area (0.12 mm uniform thickness).
Galvanising a) 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.
