The document outlines standards and acceptance tests for galvanizing and testing of materials. It discusses recommended practices for hot dip galvanizing of iron according to various Indian standards. Acceptance tests include visual examination, dimensional verification, and galvanizing tests. Standards are provided for the amount of zinc coating, specifying an average of 610 gm of zinc per square meter with a thickness of 80 microns. The quality of the zinc coating will be established through testing according to IS-2633 to ensure it is smooth, uniform and free of defects.

1. Galvanizing & Testing of material shall confirm to the latest edition of following standards
Recommended Practices for Hot Dip Galvanized of
1. IS 2629 (1966).-Recommended practices for hot dip galvanizing of Iron MS Tray
2. IS 2633 (1972)-Method of Testing, Weight, Thickness and Uniformity of coating on Hot Dip
Galvanized Article.
3. IS 5358 (1969)-Specification for coating fasteners.
4. IS 3203-Specification of Zinc Coating Thickness
Acceptance Test:
1. Visual examination test-
2. Dimensional verification length, width, height, thickness of sheet -
3. Galvanizing Test.
Hot Dip Galvanizing:
1. As per BS 729-1971, 610 gm/m2 – 80 micron.
2. IS 4759: 1966- Average zinc coating with not less than 600 gm/m2.
3. IS 2633- 1972 Galvanising quality.
4. Zn 98 as specified in IS 209- 1966.
610 gm of zinc per square meter surface with approximate thickness off 80 micron. Zinc coating
should be smooth, clean and uniform thickness and free from defects like ash and dross inclusion,
bare patches, black spots, pimples, lumpiness, rust stain blisters etc.
Quality of coating will be established by test as per IS-2633.
All manufacturing work including punching, cutting, bending and welding of cable trays will be
completed and burrs shall be removed before application of galvanizing process. Zinc should confirm
to at least Grade Zn98 as specified in IS 209- 1966.